首页|Multifunctional catalytic sites regulation of atomic-scale iridium on orthorhombic-CoSe2 for high efficiency dual-functional alkaline hydrogen evolution and organic degradation

Multifunctional catalytic sites regulation of atomic-scale iridium on orthorhombic-CoSe2 for high efficiency dual-functional alkaline hydrogen evolution and organic degradation

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The earth-abundant and high-performance catalysts are crucial for commercial implementation of hydro-gen evolution reaction(HER).Herein,a multifunctional site strategy to construct excellent HER catalysts by incorporating iridium(Ir)ions on the atomic scale into orthorhombic-CoSe2(lr-CoSe2)was reported.Outstanding hydrogen evolution activity in alkaline media such as a low overpotential of 48.7 mV at a current density of 10 mA cm-2 and better performance than commercial Pt/C catalysts at high current densities were found in the Ir-CoSe2 samples.In the experiments and theoretical calculations,it was revealed that Ir enabled CoSe2 to form multifunctional sites to synergistically catalyze alkaline HER by promoting the adsorption and dissociation of H2O(Ir sites)and optimizing the binding energy for H*on Co sites.It was noticeable that the electrolytic system comprising the Ir-CoSe2 electrode not only pro-duced hydrogen efficiently via HER,but also degraded organic pollutants(Methylene blue).The cell volt-age of the dual-function electrolytic system was 1.58 V at the benchmark current density of 50 mA cm-2,which was significantly lower than the conventional water splitting voltage.It was indicated that this method was a novel strategy for designing advanced HER electrocatalysts by constructing multifunc-tional catalytic sites for hydrogen production and organic degradation.

Orthorhombic-CoSe2Multifunctional sites designHydrogen evolution reactionSynergistically catalyzeMethylene blue oxidation

Jingjing Huang、Chenglin Zhong、Yanjie Xia、Jia Liu、Guizhen Li、Chao Yang、Jiahong Wang、Qian Wang、Zhenbao Zhang、Feng Yan、Jianghua Wu、Yu Deng、Zhenjiang Zhou、Xingchen He、Paul K.Chu、Woon-Ming Lau、Xue-Feng Yu

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College of Chemistry and Chemical Engineering,Linyi University,Linyi 276005,Shandong,China

Shenzhen Engineering Center for the Fabrication of Two-Dimensional Atomic Crystals,Shenzhen Institute of Advanced Technology,Chinese Academy of Sciences,Shenzhen 518055,Guangdong,China

National Laboratory of Solid State Microstructures,Jiangsu Key Laboratory of Artificial Functional Materials,College of Engineering and Applied Sciences and Collaborative Innovation Center of Advanced Microstructures,Nanjing University

National Laboratory of Solid State Microstructures,Jiangsu Key Laboratory of Artificial Functional Materials,College of Engineering and Applied Sciences and Collaborative Innovation Center of Advanced Microstructures,Nanjing University,Nanjing 210093,Jiangsu,China

College of Biosystems Engineering and Food Science,Zhejiang University,Hangzhou 310058,Zhejiang,China

Department of Physics,Department of Materials Science and Engineering,Department of Biomedical Engineering,City University of Hong Kong,Tat Chee Avenue,Kowloon,Hong Kong,China

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Doctoral Research Initiation Foundation of Linyi UniversityNational Natural Science Foundation of Shandong ProvinceNational Natural Science Foundation of Shandong ProvinceNational Natural Science Foundation of ChinaSIAT Innovation Program for Excellent Young Researchers(2022)Shenzhen Science and Technology Program GrantShenzhen Science and Technology Program GrantCity University of Hong Kong Donation Research GrantsCity University of Hong Kong Donation Research GrantsCity University of Hong Kong Strategic Research Grant

LYDX2020BS016ZR2021QB208ZR2022MB05422305262RCJC20200714114435061ZDSYS2022052717140601492200619229021SRG 7005505

2024

10.1016/j.jechem.2023.12.051

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.92(5)