智慧数据 | 高价值论文 | 用于海水电解的高选择性界面的可控生长 | 清洁能源 | 第23期【中国科讯】

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用于海水电解的高选择性界面的可控生长
Controlled growth of a high selectivity interface for seawater electrolysis

Sustainable 

Gao, Yang; Xue, Yurui; He, Feng; Li, Yuliang (CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, China)

PNAS | 2022-09-6| Vol 119, 36(2022)

Overall seawater electrolysis is an important direction for the development of hydrogen energy conversion. The key issues include how to achieve high selectivity, activity, and stability in seawater electrolysis reactions. In this report, the heterostructures of graphdiyne-RhO_x-graphdiyne (GDY/RhO_x/GDY) were constructed by in situ-controlled growth of GDY on RhO_x nanocrystals. A double layer interface of sp-hybridized carbon-oxide-Rhodium (sp-C∼O-Rh) was formed in this system. The microstructures at the interface are composed of active sites of sp-C∼O-Rh. The obvious electron-withdrawing surface enhances the catalytic activity with orders of magnitude, while the GDY outer of the metal oxides guarantees the stability. The electron-donating and withdrawing sp-C∼O-Rh structures enhance the catalytic activity, achieving high-performance overall seawater electrolysis with very small cell voltages of 1.42 and 1.52 V at large current densities of 10 and 500 mA cm⁻² at room temperatures and ambient pressures, respectively. The compositional and structural superiority of the GDY-derived (sp-C-metal-oxide active center offers great opportunities to engineer tunable redox properties and catalytic performance for seawater electrolysis and beyond. This is a typical successful example of the rational design of catalytic systems.

URL：

https://www.pnas.org/doi/10.1073/pnas.2206946119

Cite：Gao, Y.; Xue, Y.; He, F.; Li, Y. Controlled growth of a high selectivity interface for seawater electrolysis. Proceedings of the National Academy of Sciences 2022, 119 (36), e2206946119.

推荐人：孙朋垚

审核：赵昆华

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