电催化剂
钌
催化作用
化学
电化学
无机化学
电解质
过渡金属
吸附
光化学
电极
物理化学
有机化学
作者
Yimin Jin,Xinran Fan,Wenjing Cheng,Yuheng Zhou,Xiao Li,Wei Wang
标识
DOI:10.1002/ange.202406888
摘要
Transition metal/p‐block compounds are regarded as the most essential materials for electrochemical energy converting systems involving various electrocatalysis. Understanding the role of p‐block element on the interaction of key intermediates and interfacial water molecule orientation at the polarized catalyst‐electrolyte interface during the electrocatalysis is important for rational designing advanced p‐block modified metal electrocatalysts. Herein, taking a sequence of ruthenium phosphides (including Ru2P, RuP and RuP2) as model catalysts, we establish a volcanic‐relation between P‐proportion and alkaline hydrogen oxidation reaction (HOR) activity. The dominant role of P for regulating hydroxyl binding energy is validated by active sites poisoning experiments, pH‐dependent infection‐point behavior, in situ surface enhanced absorption spectroscopy, and density functional theory calculations, in which P could tailor the d‐band structure of Ru, optimize the hydroxyl adsorption sites across the Ru‐P moieties, thereby leading to improved proportion of strongly hydrogen‐bonded water and facilitated proton‐coupled electron transfer process, which are responsible for the enhanced alkaline HOR performance.
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