Atomic ruthenium modification of nickel-cobalt alloy for enhanced alkaline hydrogen evolution
Density functional theory (DFT) is used to predict the behavior of ruthenium-doped nickel cobalt alloy in the alkaline hydrogen evolution reaction (HER). According to DFT calculation, a synergistic effect at the Ru-Ni/Co interface is generated to accelerate water dissociation and optimize the adsorption-desorption energetics toward the H intermediate. However, excessive Ru introduction will lead to over-strong hydrogen adsorption on the catalyst surface, thus limiting H release. As a proof of concept, we design a series of NiCoRu/SP, among which the optimized NiCoRu/SP electrocatalyst achieves an overpotential of 59 mV at 10 mA cm, while excessive Ru incorporation (NiCoRu/SP) diminishes the HER activity. X-ray absorption spectroscopy and other characterizations further confirm that the interface-induced electron transfer from atomic Ru to its surrounding Ni/Co, and the activity degradation caused by excessive Ru incorporation is attributed to the generation of Ru cluster that sacrifices the interface between Ru atom and Ni/Co.
Hong Kong Polytechnic University[1-YWB6];Hong Kong Polytechnic University[1-YY4A];Hong Kong Polytechnic University[1-ZE2F];
|WOS Research Area|
Chemistry ; Engineering
Chemistry, Physical ; Engineering, Environmental ; Engineering, Chemical
|WOS Accession No|
|ESI Research Field|
Cited Times [WOS]:1
|Document Type||Journal Article|
|Department||Department of Materials Science and Engineering|
1.Department of Applied Physics,The Hong Kong Polytechnic University,Hung Hom,Kowloon,Hong Kong
2.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,Nanshan District, Guangdong,China
3.Faculty of System Design and Intelligent Manufacturing,Southern University of Science and Technology,Shenzhen,Nanshan District, Guangdong,China
|First Author Affilication||Department of Materials Science and Engineering|
Li，Liuqing,Qiu，Haifa,Zhu，Yanping,et al. Atomic ruthenium modification of nickel-cobalt alloy for enhanced alkaline hydrogen evolution[J]. Applied Catalysis B: Environmental,2023,331.
Li，Liuqing.,Qiu，Haifa.,Zhu，Yanping.,Chen，Gao.,She，Sixuan.,...&Huang，Haitao.(2023).Atomic ruthenium modification of nickel-cobalt alloy for enhanced alkaline hydrogen evolution.Applied Catalysis B: Environmental,331.
Li，Liuqing,et al."Atomic ruthenium modification of nickel-cobalt alloy for enhanced alkaline hydrogen evolution".Applied Catalysis B: Environmental 331(2023).
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