Multifunctional catalytic sites regulation of atomic-scale iridium on orthorhombic-CoSe_(2)for high efficiency dual-functional alkaline hydrogen evolution and organic degradation  

作　　者：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 

机构地区：[1]College of Chemistry and Chemical Engineering,Linyi University,Linyi 276005,Shandong,China [2]Shenzhen Engineering Center for the Fabrication of Two-Dimensional Atomic Crystals,Shenzhen Institute of Advanced Technology,Chinese Academy of Sciences,Shenzhen 518055,Guangdong,China [3]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 [4]College of Biosystems Engineering and Food Science,Zhejiang University,Hangzhou 310058,Zhejiang,China [5]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

出　　处：《Journal of Energy Chemistry》2024年第5期271-281,共11页能源化学（英文版）

基　　金：the financial support of the Doctoral Research Initiation Foundation of Linyi University(LYDX2020BS016);the National Natural Science Foundation of Shandong Province(ZR2021QB208,ZR2022MB054);the National Natural Science Foundation of China(22305262);SIAT Innovation Program for Excellent Young Researchers(2022);Shenzhen Science and Technology Program Grant(RCJC20200714114435061,ZDSYS20220527171406014);the City University of Hong Kong Donation Research Grants(9220061 and 9229021);City University of Hong Kong Strategic Research Grant(SRG 7005505)。

摘　　要：The earth-abundant and high-performance catalysts are crucial for commercial implementation of hydrogen 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(Ir-CoSe_(2))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-CoSe_(2) samples.In the experiments and theoretical calculations,it was revealed that Ir enabled CoSe_(2)to form multifunctional sites to synergistically catalyze alkaline HER by promoting the adsorption and dissociation of H_(2)O(Ir sites)and optimizing the binding energy for H^(*)on Co sites.It was noticeable that the electrolytic system comprising the Ir-CoSe_(2)electrode not only produced hydrogen efficiently via HER,but also degraded organic pollutants(Methylene blue).The cell voltage 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 multifunctional catalytic sites for hydrogen production and organic degradation.

关 键 词：Orthorhombic-CoSe_(2) Multifunctional sites design Hydrogen evolution reaction Synergistically catalyze Methylene blue oxidation 

分 类 号：X703[环境科学与工程—环境工程] TQ426[化学工程] TQ116.2