First Author:Cengceng Du

Correspondence Author:Yuqiu Huo, Hongbin Sun

Co author:Zhenyu Wang, Yiming Wang, Wenjuan Xu, Guangwen Xu

Journal:Dalton Transactions

Issue:21

Volume:53

Impact Factor:3.5

DOI number:10.1039/d4dt00595c

Affiliation of Author(s):Department of Chemistry, Tsinghua University

Teaching and Research Group:物理化学

Place of Publication:ENGLAND

Abstract:Constructing an environmentally friendly and efficient electrocatalyst holds important and profound significance for energy-efficient hydrogen production. Replacing the oxygen evolution reaction with a lower potential urea oxidation reaction (UOR) may save energy in water electrolysis to produce hydrogen. The UOR is characterized by its high energy barrier, which results in slow reaction kinetics. In this study, we introduced Ba(OH)(2) into Ni(OH)(2) to form uniform nanosheets. Due to the introduction of Ba2+, the lattice expansion of Ni(OH)(2) was triggered, leading to significant improvement in UOR activity. The catalyst achieved a current density of 100 mA cm(-2) at only 1.316 V and exhibited remarkable stability over time. Density functional theory (DFT) calculations demonstrate that the Ba-Ni(OH)(2) site significantly reduces the energy barrier for urea adsorption, intermediate steps, and desorption. This work provides a novel and environmentally friendly strategy for constructing energy-efficient and highly efficient catalysts through the doping of alkaline earth metals.

Document Code:WOS:001217748300001

Discipline:Natural Science

First-Level Discipline:Chemistry

Page Number:9021-9027

ISSN No.:1477-9226

Translation or Not:no