Strongly Coupled Cobalt Diselenide Monolayers for Selective Electrocatalytic Oxygen Reduction to H 2 O 2 under Acidic Conditions
| Autor: | Xusheng Zheng, Chao Gu, Shuai Qin, Lei Shi, Min-Rui Gao, Zhi-Zheng Wu, Peng-Peng Yang, Junfa Zhu, Fei-Yue Gao, Xiao-Long Zhang, Ya-Rong Zheng, Yu Duan, Rui Wu, Zhuang-Zhuang Niu, Shaojin Hu, Xiaozhi Su |
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| Rok vydání: | 2021 |
| Předmět: |
Strongly coupled
Materials science Inorganic chemistry chemistry.chemical_element General Medicine General Chemistry Electrolyte Photochemistry Electrosynthesis Oxygen reduction Catalysis Diselenide chemistry.chemical_compound Adsorption chemistry Monolayer Hydrogen peroxide Cobalt Faraday efficiency |
| Zdroj: | Angewandte Chemie International Edition. 60:26922-26931 |
| ISSN: | 1521-3773 1433-7851 |
| DOI: | 10.1002/anie.202111075 |
| Popis: | Electrosynthesis of hydrogen peroxide (H2 O2 ) in the acidic environment could largely prevent its decomposition to water, but efficient catalysts that constitute entirely earth-abundant elements are lacking. Here we report the experimental demonstration of narrowing the interlayer gap of metallic cobalt diselenide (CoSe2 ), which creates high-performance catalyst to selectively drive two-electron oxygen reduction toward H2 O2 in an acidic electrolyte. The enhancement of the interlayer coupling between CoSe2 atomic layers offers a favorable surface electronic structure that weakens the critical *OOH adsorption, promoting the energetics for H2 O2 production. Consequently, on the strongly coupled CoSe2 catalyst, we achieved Faradaic efficiency of 96.7 %, current density of 50.04 milliamperes per square centimeter, and product rate of 30.60 mg cm-2 h-1 . Moreover, this catalyst shows no sign of degradation when operating at -63 milliamperes per square centimeter over 100 hours. |
| Databáze: | OpenAIRE |
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