【学术视频】慕尼黑工业大学Roland A. Fischer教授：Integration of Metal-Organic...

原创 KouShare 蔻享学术

更多精彩视频登陆网站

www.koushare.com

图 | Roland A. Fischer

题目：Integration of Metal-Organic Frameworks to Devices: SURMOF-Derived Electrocatalysts for Water-Splitting and Fuel Cell Applications

报告人：Roland A. Fischer

单位：Technical University of Munich (TUM)

时间：2019-11-22

地点：中国科学技术大学

扫码观看精彩报告视频

报告摘要

Metal-Organic Frameworks (MOFs) are crytalline and porous coordination network materials which are composed of metal ion building units connected by organic linkers via coordination bonds. MOFs feature a wide range of fascinating structures, and offer unique opportunities of molecular materials design and a huge paremeter space of fine tuning of chemical and physical properties. Applications of MOF inculde energy, environment, health and information technologies. MOF crystallite and thin film deposition and selective positioning to substrate surfaces. Within the past decade, surface anchored MOF (SURMOF) research has seen a tremendous evolution. The lecture summarizes this development, highlighting vapor-phase assisted growth being compatible with Chemical Vapor Deposition (CVD) and Atomic Layer Deposition (ALD) techniques and the coordination modulated quasi-epitaxial stepwise layer-by-layer growth in the liquid phase (CM-LPE) of SURMOFs.

A novel application of SURMOF-derived materials is presented. For example, unprecedented OER catalyst mass specific activity and stability in alkaline solution were discovered for mixed NiCo hydroxide electrocatalysts, which were derived from NiCo-BDC SURMOFs on macro-and microelectrode substrates. The activity of ~2.5 mA·μg^-1 at the overpotential of 300 mV is superior to benchmarked electrocatalysts. The excellent morphology of the SURMOF-derived ultrathin electrocatalyst coating led to a high exposure of the most active Ni and Co sites.

The performance can be further improved by a lattice strain modulation approach. NiFe-BDC SURMOF derivatives were obtained reaching a current density of 200 mA·cm^-2 at a small overpotential of 210 mV, and long-term stability of over 120 h at a current density of 500 mA cm^-2. This bi-functional catalyst for OER and ORR features a very narrow overpotential window of 0.68 V in 0.1 M KOH, in which the mass loading was two orders of magnitude lower than bench mark electrocatalysts.

个人简介

Roland A. Fischer教授，德国慕尼黑工业大学催化硏究中心主仼、欧洲科学院院士和徳国DFG分管亚洲事务的副主席。Fischer教授曾担任多个高质量杂志编委，包括Angewandte Chemie, Chem. Vap. Depos. Dalton Transactions, J. Organomet. Chem. Fischer教授已经发表了500多篇研究论文（非自引数>17500次），入选2018年度高被引科学家 ( Web of science)。