文献类型：期刊文献

英文题名：Regulating the Rate-Determining Step of Urea Oxidation Over a Vanadium Single Atom Incorporated Co Hydroxide Electrocatalyst

作者：Zhang, Baojie[1]; Pan, Changti[1]; Liu, Hengjie[2]; Wu, Xingshun[1]; Jiang, Hongliang[3]; Yang, Li[1]; Qi, Zeming[2]; Li, Guang[1]; Shan, Lei[1]; Lin, Yunxiang[1]; Song, Li[2]; Jiang, Yong[4,5]

机构：[1] Institutes of Physical Science and Information Technology, School of Materials Science and Engineering, Anhui Key Laboratory of Information Materials and Device, Anhui University, Hefei, 230601, China; [2] National Synchrotron Radiation Laboratory, CAS, Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, 230029, China; [3] School of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China; [4] School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China; [5] School of Electronic and Information Engineering, Tiangong University, Tianjin, 300387, China

年份：2022

外文期刊名：SSRN

收录：EI(收录号：20220045221)

语种：英文

外文关键词：Atoms - Catalytic oxidation - Cobalt compounds - Electrocatalysts - Electronic structure - Fourier transform infrared spectroscopy - Metabolism - Synchrotron radiation - Urea - Vanadium - Vanadium compounds

摘要：Urea oxidation reaction (UOR) has emerged as a competitive approach for many energy-related technologies due to the low overpotential and fast reaction dynamics. The main challenge lies in fabricating high-efficient catalysts with optimized electronic structure and understanding the intrinsic structure-related mechanisms. Here, we report a feasible strategy of regulating the rate-determining step (RDS) of UOR via an electrochemical reconstructed Co hydroxide catalyst incorporated with V single atoms. The optimal catalysts exhibit an enhanced UOR performance after V incorporation while remarkably suppressed the competitive oxygen evolution. Operando synchrotron-radiation Fourier transform infrared spectroscopy (SR-FTIR) combining density functional theory (DFT) calculations reveal that enabled by single atom V incorporation, the RDS of UOR has been changed from the first deprotonation step to the second one with a lower energy barrier, which is thermodynamically favorable for the overall reaction process. ? 2022, The Authors. All rights reserved.