[ACIE] 我室孙世刚教授发表论文:Interfacial structure of water as a new descriptor of hydrogen evolution reaction

发布日期:2020年09月15日   浏览次数:

我室孙世刚教授在 ACIE 上发表论文:Interfacial structure of water as a new descriptor of hydrogen evolution reaction

文章链接:https://onlinelibrary.wiley.com/doi/10.1002/anie.202007567

摘要:Driven by the persisting poor understanding of the sluggish kinetics of the hydrogen evolution reaction (HER) on Pt in alkaline media, a direct correlation of the interfacial water structure and activity is still yet to be established. Here, we first demonstrated a strong dependence of the proton donor structure on the HER activity and pH. The structure of the first layer evolutes from the proton acceptors to the donors with increasing pH. In the base, the reactivity of the interfacial water varied with their structure, and the activation energies of water dissociation increased in the sequence: the dangling O–H bonds < the trihedrally coordinated water < the tetrahedrally coordinated water. Moreover, optimizing the adsorption of H and OH intermediate can re‐orient the interfacial water molecules with their H atoms pointing towards the electrode surface, thereby enhancing the kinetics of HER. Our results clarified the dynamic role of the water structure at the electrode‐electrolyte interface during HER and the design of highly efficient HER catalysts.