《纳米研究》2019年第9期目录
Nano Research
Editorial
The Nano Research Young Innovators (NR45) Awards in nanoenergy
Hailiang Wang1,* and Hongjie Dai2,*
1 Yale University, USA
2 Stanford University, USA
1975–1977
Review Articles
Conductive polymers for stretchable supercapacitors
Yaqun Wang1,*, Yu Ding2, Xuelin Guo2, and Guihua Yu2,*
1 Shandong University of Science and Technology, China
2 The University of Texas at Austin, USA
This review summarizes the material and structural design for conductive polymer-based stretchable supercapacitors and discusses the challenge and important directions in this emerging field.
1978–1987
Aqueous organic redox flow batteries
Vikram Singh1,2, Soeun Kim1,2, Jungtaek Kang1, and Hye Ryung Byon1,2,*
1 Korea Advanced Institute of Science and Technology (KAIST), Republic of Korea
2 KAIST Institute for NanoCentury, Republic of Korea
Recent developments in aqueous organic redox flow batteries, including the molecular design and the corresponding cycling performance as these organic redox molecules are employed as either the negolyte or posolyte. New strategies using nanotechnology and our perspective for the future development of this rapidly growing field are included.
1988–2001
Vertically-aligned nanostructures for electrochemical energy storage
Xue Wang1,2, Tianyang Wang2, James Borovilas2, Xiaodong He1,*, Shanyi Du1,*, and Yuan Yang2,*
1 Harbin Institute of Technology, China
2 Columbia University, USA
This review summarizes battery kinetics to illustrate the importance of low tortuosity in electrodes, and then introduces various methods to create vertically aligned nanostructures, such as direct growth, templating and microfabrications.
2002–2017
Ni-based cathode materials for Na-ion batteries
Chenglong Zhao1,2, Yaxiang Lu1,2,*, Liquan Chen1, and Yong- Sheng Hu1,2,3,*
1 Institute of Physics, Chinese Academy of Sciences, China
2 University of Chinese Academy of Sciences, China
3 Yangtze River Delta Physics Research Center Co. Ltd, China
The potential strategies on designing layered oxide cathodes of Na-ion batteries have been introduced through the discussion of Ni-based cathode materials.
2018–2030
Crystal phase engineering on photocatalytic materials for energy an environmental applications
Song Bai1,2,*, Chao Gao2, Jingxiang Low2, and Yujie Xiong2,*
1 Zhejiang Normal University, China
2 University of Science and Technology of China, China
Phase design of photocatalytic materials has shown great promise for enhanced performance in energy and environmental applications. This review summarizes the state-of-the-art progress on the phase-engineered photocatalytic materials with fundamental mechanisms.
2031–2054
Rational design of three-phase interfaces for electrocatalysis
Yuqing Wang, Yuqin Zou*, Li Tao, Yanyong Wang, Gen Huang, Shiqian Du, and Shuangyin Wang*
Hunan University, China
This review covers a summarization of design principles and synthetic strategies for triple-phase interfaces to optimize electrocatalytic performance of gas-involving electrocatalysis.
2055–2066
Metal organic frameworks derived single atom catalysts for electrocatalytic energy conversion
Tingting Sun1, Lianbin Xu2, Dingsheng Wang1,*, and Yadong Li1
1 Tsinghua University, China
2 Beijing University of Chemical Technology, China
We summarize the recent progress in the synthesis and characterization of metal-organic framework (MOF)-derived single atom catalysts, mainly focusing on their electrocatalytic applications in the oxygen reduction reaction (ORR), hydrogen evolution reaction (HER), oxygen evolution reaction (OER), and CO2 reduction.
2067–2080
Nanoengineering of solid oxide electrochemical cell technologies: An outlook
Juliana Carneiro and Eranda Nikolla*
Wayne State University, USA
In this perspective, we discuss the progress in nanoengineering electrodes for solid oxide electrochemical cells (SOCs), highlighting the advantages and challenges of the use of nano-electrocatalysts. We suggest approaches that merge important nanoengineering strategies in order to obtain nano-structured electrodes with optimal electrocatalytic activity, selectivity and stability.
2081–2092
Heterogeneous molecular catalysts for electrocatalytic CO2 reduction
Nathan Corbin, Joy Zeng, Kindle Williams, and Karthish Manthiram*
Massachusetts Institute of Technology, USA
Molecular catalysts immobilized onto electrodes are discussed for electrocatalytic CO2 reduction. The various underlying factors and design strategies contributing to observed performance are discussed to provide an overview of the field.
2093–2125
Recent progress on in situ characterizations of electrochemically intercalated transition metal dichalcogenides
Sajad Yazdani1,2, Milad Yarali1,2, and Judy J. Cha1,2,*
1 Yale University, USA
2 Yale University West Campus, USA
This review outlines the recent progress on the in situ studies of the electrochemical intercalation in transition metal dichalcogenides.
2126–2139
Microscopic insights into the catalytic mechanisms of monolayer MoS2 and its heterostructures in hydrogen evolution reaction
Min Hong, Jianping Shi, Yahuan Huan, Qin Xie, and Yanfeng Zhang*
Peking University, China
The model systems of MoS2/Au, MoS2/graphene (Gr)/Au and MoS2/WS2/Au constructed for hydrogen evolution reaction are comprehensively introduced. The underlying catalytic mechanisms based on the on-site scanning tunneling microscopy/spectroscopy investigations are also discussed.
2140–2149
Oxygen-deficient metal oxides: Synthesis routes and applications in energy and environment
Di Zu, Haiyang Wang, Sen Lin, Gang Ou, Hehe Wei, Shuqing Sun*, and Hui Wu*
Tsinghua University, China
We have summarized recent progress of oxygen-deficient metal oxide nanomaterials in preparation methods and applications in energy and environment fields.
2150–2163
Plasmon-exciton interaction in colloidally fabricated metal nanoparticle quantum emitter nanostructure
Yi Luo and Jing Zhao*
University of Connecticut, USA
Colloidal methods have been applied to hybrid nanostructures composed of plasmonic nanoparticle and quantum emitters. Unique optical features of these nanostructures arise from the energy exchange between plasmons and excitons in the weak, semi-strong and strong coupling regimes.
2164–2171
Optical materials and metamaterials from nanostructured soft matter
Uri R. Gabinet and Chinedum O. Osuji*
University of Pennsylvania, USA
Self-assembly of soft matter leads to nanostructured materials. In this review we address how such systems can be utilized to advance myriad optical and metamaterial applications.
2172–2183
Enhancing bioelectricity generation in microbial fuel cells and biophotovoltaics using nanomaterials
Mohammed Mouhib1, Alessandra Antonucci1, Melania Reggente1, Amirmostafa Amirjani1,2, Alice J. Gillen1, and Ardemis A. Boghossian1,*
1 Ecole Polytechnique Fédérale de Lausanne (EPFL), Switzerland
2 Amirkabir University of Technology (Tehran Polytechnic), Iran
Interfacing biological parts with nanoparticles is a promising approach to increase the overall efficiency of microbial fuel cells and biophotovoltaics.
2184–2199
Challenges and opportunities in IR nanospectroscopy measurements of energy materials
Elad Gross*
The Hebrew University of Jerusalem, Israel
Infrared (IR) nanospectroscopy enables the extraction of detailed chemical information at the nanoscale. As described in this review paper, these measurements provide the capabilities to identify the ways by which local properties influence the global performances of energy materials, such as solar cells and heterogeneous catalysts.
2200–2210
Research Articles
Boosting the rate capability of multichannel porous TiO2 nanofibers with well-dispersed Cu nanodots and Cu2+-doping derived oxygen vacancies for sodium-ion batteries
Ying Wu1, Zengxi Wei2, Rui Xu1, Yue Gong3, Lin Gu3,4, Jianmin Ma2, and Yan Yu1,5,*
1 University of Science and Technology of China, China
2 Hunan University, China
3 Institute of Physics, Chinese Academy of Sciences, China
4 Collaborative Innovation Center of Quantum Matter, China
5 Dalian National Laboratory for Clean Energy, Chinese Academy of Sciences, China
The multichannel porous TiO2 nanofibers with well-dispersed Cu nanodots and Cu2+-doping derived oxygen vacancies (denoted as Cu-MPTO) have been fabricated via electrospinning. When used as anode material for sodium ion batteries, an outstanding rate performance (120 mAh·g–1 at 20 C) and a superior cycling stability for ultralong cycle life (120 mAh·g–1 at 20 C and 96.5% retention over 2,000 cycles) could be obtained.
2211–2217
Co-doped 1T-MoS2 nanosheets embedded in N, S-doped carbon nanobowls for high-rate and ultra-stable sodium-ion batteries
Peihao Li1, Yong Yang1, Sheng Gong2, Fan Lv1, Wei Wang1, Yiju Li1, Mingchuan Luo1, Yi Xing1, Qian Wang1, and Shaojun Guo1,*
1 Peking University, China
2 Massachusetts Institute of Technology, USA
Co-doped 1T-MoS2 nanosheets embedded in N, S-doped carbon nanobowls show extraordinary rate and cycling capability in sodium-ion batteries.
2218–2223
Dendrite-free sandwiched ultrathin lithium metal anode with even lithium plating and stripping behavior
Tao Li, Peng Shi, Rui Zhang, He Liu, Xin-Bing Cheng, and Qiang Zhang*
Tsinghua University, China
Sandwiched Li enables even Li stripping/plating morphologies through diminishing the metallurgical nonuniformity effects (slip lines) on stripping as well as by providing rich nucleation sites for Li plating.
2224–2229
Flame-retardant quasi-solid polymer electrolyte enabling sodium metal batteries with highly safe characteristic and superior cycling stability
Jinfeng Yang1,2, Min Zhang1,3, Zheng Chen1, Xiaofan Du1, Suqi Huang1,3, Ben Tang1,2, Tiantian Dong1, Han Wu1, Zhe Yu1, Jianjun Zhang1,*, and Guanglei Cui1,*
1 Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, China
2 University of Chinese Academy of Sciences, China
3 Qingdao University, China
The as-obtained flame-retardant quasi-solid polymer electrolyte consisted of poly(methyl vinyl ether-alt-maleic anhydride) (P(MVE-alt-MA)) as host, bacterial cellulose as reinforcement, and triethyl phosphate/vinylene carbonate/sodium perchlorate (TEP/VC/NaClO4) as plasticizer, which endows Na3V2(PO4)3/Na metal batteries with superior long-term cycling stability.
2230–2237
Comprehensive study of a versatile polyol synthesis approach for cathode materials for Li-ion batteries
Hyeseung Chung1, Antonin Grenier2, Ricky Huang1, Xuefeng Wang1, Zachary Lebens-Higgins3, Jean-Marie Doux1, Shawn Sallis4, Chengyu Song4, Peter Ercius4, Karena Chapman2, Louis F. J. Piper3, Hyung-Man Cho1, Minghao Zhang1,*, and Ying Shirley Meng1,*
1 University of California, San Diego, USA
2 Stony Brook University, USA
3 Binghamton University, USA
4 Lawrence Berkeley National Laboratory, USA
A novel polyol synthesis method has been developed for layered LiNi0.4Mn0.4Co0.2O2 (NMC), spinel LiNi0.5Mn1.5O4 (LNMO), and olivine LiCoPO4 (LCP) cathode materials. Reaction mechanism has been studied in detail with combination of in situ and ex situ techniques.
2238–2249
Solvent-free nanocasting toward universal synthesis of ordered mesoporous transition metal sulfide@N-doped carbon composites for electrochemical applications
Jiahui Zhu, Zhi Chen, Lin Jia, Yuqi Lu, Xiangru Wei, Xiaoning Wang, Winston Duo Wu, Na Han, Yanguang Li*, and Zhangxiong Wu*
Soochow University, China
Ordered mesoporous transitional metal sulfide@N-doped carbon composites with ultrahigh surface areas, unique chemical stoichiometries and variable nano-architectures are synthesized by using a solvent-free nanocasting approach. The structure evolution over the synthesis process is depicted. The obtained materials are promising for electrochemical applications.
2250–2258
Millisecond synthesis of CoS nanoparticles for highly efficient overall water splitting
Yanan Chen, Shaomao Xu, Shuze Zhu, Rohit Jiji Jacob, Glenn Pastel, Yanbin Wang, Yiju Li, Jiaqi Dai, Fengjuan Chen, Hua Xie, Boyang Liu, Yonggang Yao, Lourdes G. Salamanca-Riba, Michael R. Zachariah, Teng Li, and Liangbing Hu*
University of Maryland，College Park, USA
This work reports an ultrafast (~ 7 ms), in-situ synthesis technique for transition metal chalcogenides@ultrathin graphene core-shell electrocatalyst assisted by high temperature treatment. It is demonstrated that the cobalt sulfide (~ 20 nm in diameter)@ultrathin graphene (~ 2 nm in thickness) core-shell nanoparticles embedded in RGO nanosheets exhibit remarkable bifunctional electrocatalytic activity and stability for overall water splitting.
2259–2267
Fabrication of bilayer Pd-Pt nanocages with sub-nanometer thin shells for enhanced hydrogen evolution reaction
Yihe Wang, Lei Zhang, Congling Hu, Shengnan Yu, Piaoping Yang, Dongfang Cheng, Zhi-Jian Zhao, and Jinlong Gong*
Tianjin University, China
This paper describes the fabrication of bilayer Pd-Pt nanocages by etching away the Pd templates of multishelled nanocubes. These nanocages with high dispersion of the active atoms reduce hydrogen evolution reaction (HER) overpotentials and maintain long-term stability.
2268–2274
Towards maximized utilization of iridium for the acidic oxygen evolution reaction
Marc Ledendecker1,*, Simon Geiger1, Katharina Hengge1, Joohyun Lim1, Serhiy Cherevko3, Andrea M. Mingers1, Daniel Göhl1, Guilherme V. Fortunato1,5, Daniel Jalalpoor2, Ferdi Schüth2, Christina Scheu1, Karl J. J. Mayrhofer1,3,4,*
1 Nanoanalytics and Interfaces Max-Planck-Institut für Eisenforschung GmbH, Germany
2 Max-Planck-Institut für Kohlenforschung, Germany
3 Forschungszentrum Jülich, Germany
4 Friedrich-Alexander-Universität Erlangen-Nürnberg, Germany
5 Universidade Federal de Mato Grosso do Sul, Brazil
Strategies how to obtain stable and active catalysts with maximized iridium utilization for the oxygen evolution reaction are discussed.
2275–2280
Ternary mesoporous cobalt-iron-nickel oxide efficiently catalyzing oxygen/hydrogen evolution reactions and overall water splitting
Lulu Han1, Limin Guo2,3,*, Chaoqun Dong1, Chi Zhang4, Hui Gao1, Jiazheng Niu1, Zhangquan Peng3,4,*, and Zhonghua Zhang1,4,*
1 Shandong University, China
2 Jilin Engineering Normal University, China
3 Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, China
4 Wuyi University, China
CoFeNi-O with hierarchical bimodal channel structure was prepared via dealloying and it shows superior performance for oxygen evolution reaction (OER)/hydrogen evolution reaction (HER) with extremely low overpotentials. Overall water splitting is featured with a low voltage of 1.558 V@10 mA·cm–2 for 25 h. Catalytic performance was enhanced because of the Co-Fe-Ni alloying effect and metallic Ni residual.
2281–2287
Ternary Ni-Co-Fe oxyhydroxide oxygen evolution catalysts: Intrinsic activity trends, electrical conductivity, and electronic band structure
Michaela Burke Stevens1, Lisa J. Enman1, Ester Hamal Korkus2, Jeremie Zaffran2, Christina D. M. Trang1, James Asbury1, Matthew G. Kast1, Maytal Caspary Toroker2,*, and Shannon W. Boettcher1,*
1 University of Oregon, USA
2 Israel Institute of Technology, Israel
The electronic/electrochemical properties and activity of ternary Co-Ni-Fe oxyhydroxide oxygen evolution electrocatalysts are shown to be tunable based on composition. The addition of Co to Ni oxyhydroxide shifts the onset of electrical conductivity to more-negative potentials while the addition of Fe dramatically enhances activity. Calculations further show strong electronic hybridization between all the metal cations and oxygen at the valence band edge.
2288–2295
Room-temperature ligancy engineering of perovskite electro-catalyst for enhanced electrochemical water oxidation
Junchi Wu1, Yuqiao Guo1, Haifeng Liu2, Jiyin Zhao1, Haodong Zhou1, Wangsheng Chu1, and Changzheng Wu1,*
1 University of Science and Technology of China, China
2 Southwest University of Science and Technology, China
Ligancy engineering of perovskite electrocatalyst with ordered oxygen vacancies and excellent electric conductivity accelerates electrochemical evolution of O2 in alkaline solution.
2296–2301
Enhancing oxygen evolution reaction by cationic surfactants
Qixian Xie, Daojin Zhou, Pengsong Li, Zhao Cai, Tianhui Xie, Tengfei Gao, Ruida Chen, Yun Kuang*, and Xiaoming Sun*
Beijing University of Chemical Technology, China
Superaerophobic nanoarray electrodes have shown their advantage in bubble releasing behavior in various gas evolution reactions. Herein we introduce cationic surfactants on the electrode surface to further enhance the water splitting performance, which pave a new way for better electrolysis system design.
2302–2306
Influence of 3d transition-metal substitution on the oxygen reduction reaction electrocatalysis of ternary nitrides in acid
Kevin E. Fritz1, Yichen Yan1, and Jin Suntivich1,2,*
1 Cornell University, USA
2 Kavli Institute at Cornell for Nanoscale Science, USA
More electronegative 3d metals yield improved oxygen reduction reaction (ORR) activity in acidic environments for 3d metal substituted molybdenum and tungsten nitride catalysts.
2307–2312
Multiscale carbon foam confining single iron atoms for efficient electrocatalytic CO2 reduction to CO
Zheng Zhang1,2, Chao Ma3, Yunchuan Tu1,2, Rui Si4, Jie Wei1, Shuhong Zhang1, Zhen Wang5, Jian-Feng Li1, Ye Wang1, and Dehui Deng1,2,*
1 Xiamen University, China
2 Dalian Institute of Chemical Physics, Chinese Academy of Sciences, China
3 Hunan University, China
4 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, China
5 Thermo Fisher Scientific, International Bioisland, China
A multiscale carbon foam confining single iron atoms was synthesized with the assistant of SiO2 template. The optimized catalyst achieves a maximal CO Faradaic efficiency of 94.9% at a moderate potential of –0.5 V vs. RHE, and maintains stable over 60 h.
2313–2317
Highly efficient and selective CO2 electro-reduction with atomic Fe-C-N hybrid coordination on porous carbon nematosphere
Haixia Zhong1, Fanlu Meng1,2, Qi Zhang1, Kaihua Liu1,2, and Xinbo Zhang1,*
1 Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, China
2 Jilin University, China
Fe and N doping porous carbon nematosphere (FeNPCN) is developed as the excellent carbon dioxide reduction (CO2RR) electrocatalyst in aqueous electrolyte, which possesses great potential application in CO2 reduction and syngas related industry.
2318–2323
Enhanced N-doping in mesoporous carbon for efficient electrocatalytic CO2 conversion
Min Kuang, Anxiang Guan, Zhengxiang Gu, Peng Han, Linping Qian, and Gengfeng Zheng*
Fudan University, China
We developed a facile strategy to generate mesoporous N-doped carbon frameworks with tunable configurations and contents of N dopants, by using a secondary doping process via the treatment of a N,N-dimethylformamide (DMF) solvent. After the DMF treatment, the obtained N-doped carbon catalyst possesses a much increased density of pyridinic N and defects, which enhance the activation and adsorption of CO2 molecules, thus increasing the activity of CO2 reduction reaction (CO2RR).
2324–2329
Revealing the hidden performance of metal phthalocyanines for CO2 reduction electrocatalysis by hybridization with carbon nanotubes
Zhan Jiang1,2, Yang Wang1,2,*, Xiao Zhang2, Hongzhi Zheng2, Xiaojun Wang2, and Yongye Liang2,*
1 Harbin Institute of Technology, China
2 Southern University of Science and Technology, China
Metal phthalocyanine/carbon nanotube hybrids are prepared to study their cata-lytic performance for CO2 electroreduction. These hybrids show higher activity, better stability and unambiguous performance compared to molecules directly loaded on electrode with significant aggregation.
2330–2334
Enhancing catalytic H2 generation by surface electronic tuning of systematically controlled Pt-Pb nanocrystals
Bin E1,3,4, Bolong Huang2, Nan Zhang1, Qi Shao1,Yujing Li3,4, and Xiaoqing Huang1,*
1 Soochow University, China
2 The Hong Kong Polytechnic University, Hong Kong, China
3 Beijing Institute of Technology, China
4 China University of Petroleum, China
Well-defined PtPb nanocrystals (NCs) have been selectively synthesized via an effective method, and the optimized PtPb octahedra nanocrystals (ONCs)/C is the most active catalyst for the ethanol reforming to H2. X-ray photoelectron spectroscopy (XPS) reveals that the high Pt(0)/Pt(II) ratio in PtPb NCs/C enhances the alcohols reforming. The density functional theory (DFT) studies show the PtPb ONCs possess the highest surface averaged electronic occupation for unit Pt-atom, matching well with XPS results.
2335–2340
Highly efficient K-Fe/C catalysts derived from metal-organic frameworks towards ammonia synthesis
Pengqi Yan1, Wenhan Guo1, Zibin Liang1, Wei Meng1, Zhen Yin2, Siwei Li1, Mengzhu Li1, Mengtao Zhang1, Jie Yan1, Dequan Xiao3, Ruqiang Zou1,*, and Ding Ma1,*
1 Peking University, China
2 Tianjin Polytechnic University, China
3 University of New Haven, USA
K-Fe/C catalyst developed by Fe-based metal-organic framework (MOF) gel shows high efficiency and thermal stability on ammonia synthesis. The promotion of potassium was studied.
2341–2347
Controlled growth of uniform two-dimensional ZnO overlayers on Au(111) and surface hydroxylation
Hao Wu1,2, Qiang Fu1,*, Yifan Li1,2, Yi Cui3, Rui Wang3, Nan Su1,2, Le Lin1, Aiyi Dong1, Yanxiao Ning1, Fan Yang1, and Xinhe Bao1,2
1 Dalian Institute of Chemical Physics, Chinese Academy of Sciences, China
2 University of Science and Technology of China, China
3 Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, China
Controlled growth of uniform monolayer and bilayer ZnO nanostructures on Au(111) has been achieved using O3 and NO2, respectively, and strong hydroxylation of the two-dimensional ZnO overlayers was observed in milli-bar water vapor or with atomic hydrogen species.
2348–2354
Assessment of oxide nanoparticle stability in liquid phase transmission electron microscopy
Mark J. Meijerink, Krijn P. de Jong, and Jovana Zečević*
Utrecht University, The Netherlands
Liquid phase transmission electron microscopy (LP-TEM) has a power to provide unique insight in nanoscale dynamic processes involving oxides nanomaterials, but material stability during imaging remains a challenge. Here we demonstrate that there is a correlation between oxide stability in LP-TEM and Gibbs free energy of hydration, which can aid in assessment of oxide suitability for LP-TEM.
2355–2363
Anisotropic iron-doping patterns in two-dimensional cobalt oxide nanoislands on Au(111)
Anthony Curto1, Zhaozong Sun2, Jonathan Rodríguez- Fernández2, Liang Zhang1, Ayush Parikh1, Ting Tan1, Jeppe V. Lauritsen2, and Aleksandra Vojvodic1,*
1 University of Pennsylvania, USA
2 Aarhus University, Denmark
A combined density functional theory (DFT) and scanning tunneling microscopy (STM) approach is used to predict the Fe-dopant distribution and clustering of Fe-doped CoO nanoisland. We find an anisotropic Fe-dopant incorporation pattern throughout the nanoisland with the most favorable Fe incorporation site at the oxygen edge and a change in Fe incorporation site preference upon clustering occurring at high Fe-dopant densities.
2364–2372
Pressure-dependent phase transition of 2D layered silicon telluride (Si2Te3) and manganese intercalated silicon telluride
Virginia L. Johnson, Auddy Anilao, and Kristie J. Koski*
University of California, Davis, USA
Two-dimensional (2D) layered silicon telluride (Si2Te3) and Mn-intercalated Si2Te3 nanoplates were compressed to 12 GPa using diamond anvil cell techniques and Raman spectroscopy. A semiconductor to metal phase transition is identified.
2373–2377
Dependence of interface energetics and kinetics on catalyst loading in a photoelectrochemical system
Yumin He1, Srinivas Vanka2,4, Tianyue Gao1, Da He1, Jeremy Espano1, Yanyan Zhao1, Qi Dong1, Chaochao Lang1, Yongjie Wang2, Thomas W. Hamann3, Zetian Mi2, and Dunwei Wang1,*
1 Boston College, USA
2 University of Michigan, USA
3 Michigan State University, USA
4 McGill University, Canada
Pt loading amount affects charge transfer and charge recombination at the Si/GaN interface in a GaN-protected Si photocathode with a buried junction.
2378–2384
Supramolecular precursor strategy for the synthesis of holey graphitic carbon nitride nanotubes with enhanced photocatalytic hydrogen evolution performance
Xiaoshuai Wang1,3, Chao Zhou1, Run Shi1, Qinqin Liu3, Geoffrey I. N. Waterhouse4, Lizhu Wu1, Chen-Ho Tung1, and Tierui Zhang1,2,*
1 Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, China
2 University of Chinese Academy of Sciences, China
3 Jiangsu University, China
4 The University of Auckland, New Zealand
A simple one-step thermal polymerization method has been developed for synthesis of holey graphitic carbon nitride (g-C3N4) nanotubes, which showed enhanced photocatalytic H2 production activity under visible-light irradiation compared to traditional g-C3N4 samples obtained by direct calcination of melamine or urea alone.
2385–2389
The role of phase impurities and lattice defects on the electron dynamics and photochemistry of CuFeO2 solar photocathodes
Elizabeth A. Fugate, Somnath Biswas, Mathew C. Clement, Minkyu Kim, Dongjoon Kim, Aravind Asthagiri*, and L. Robert Baker*
The Ohio State University, USA
In this work we investigate the role of phase impurities and lattice defect states on the electron dynamics and photochemical efficiency of CuFeO2. Visible light transient absorption and density functional theory (DFT) calculations provide insight on effects of Cu vacancies, O interstitials, and CuO/CuFeO2 heterostructures on the competition between charge separation and recombination dynamics in this material.
2390–2399
The impact of fluorination on both donor polymer and non-fullerene acceptor: The more fluorine, the merrier
Nicole Bauer1, Qianqian Zhang1, Jeromy James Rech1, Shuixing Dai2, Zhengxing Peng3, Harald Ade3, Jiayu Wang2, Xiaowei Zhan2, and Wei You1,*
1 University of North Carolina at Chapel Hill, USA
2 Peking University, China
3 North Carolina State University, USA
More fluorination leads to higher overall efficiency yet the trade-off between Voc and Jsc still exists.
2400–2405
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