文献类型：期刊文献

英文题名：Ni-CeO2 Heterostructure Promotes Hydrogen Evolution Reaction via Tuning of the O-H Bond Length of Adsorbed Water at the Electrolyte/Electrode Interface

作者：Yang, Xiaoling[1];Xi, Menghua[1];Guo, Xing[2];Shen, Jianhua[1];Liu, Zhen[2];Jiang, Hongliang[2];Zhu, Yihua[1]

机构：[1]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, Sch Mat Sci & Engn, Key Lab Ultrafine Mat,Minist Educ, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem Engn, Shanghai 200237, Peoples R China

年份：2023

卷号：16

期号：17

外文期刊名：CHEMSUSCHEM

收录：;EI(收录号：20232814391328);WOS:【SCI-EXPANDED(收录号:WOS:001022725100001)】；

基金：Acknowledgments This work was supported by the National Natural Science Foundation of China (21978087, 22178106, 22278136, U22B20143), the Science and Technology Commission of Shanghai Municipality (23ZR1416400, 22dz1205900), Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutes of High Learning, and the Fundamental Research Funds for the Central Universities (222201718002).

语种：英文

外文关键词：hydrogen evolution reaction; electrocatalysts; eterogeneous structures; interfaces; water dissociation

摘要：Understanding the properties and structure of reactant water molecules at the electrolyte solution/electrode interface is relevant to know the mechanisms of hydrogen evolution reaction (HER). However, this approach has rarely been implemented due to the elusive local microenvironment in the vicinity of the catalyst. Taking the Ni-CeO2 heterostructure immobilized onto carbon paper (Ni-CeO2/CP) as a model, the dynamic behavior of adsorbed intermediates during the reaction was measured by in situ surface-enhanced infrared absorption spectroscopy with attenuated total reflection configuration (ATR-SEIRAS). Theoretical calculations are used in combination to comprehend the potential causes of increased HER activity. The results show that the O-H bond of adsorbed water at the electrolyte solution/electrode interface becomes longer for promoting the dissociation of water and accelerating the kinetically slow Volmer step. In addition, forming the Ni-CeO2 heterostructure interface optimizes the hydrogen adsorption Gibbs free energy, thus increasing HER activity. Therefore, the Ni-CeO2/CP electrode exhibits remarkably low HER overpotentials of 37 and 119 mV at 10 and 100 mA cm(-2), which are close to commercial Pt/C (16 and 102.6 mV, respectively).