第一作者：Cengceng Du

通讯作者：Yuqiu Huo, Hongbin Sun

合写作者：Zhenyu Wang, Yiming Wang, Wenjuan Xu, Guangwen Xu

发表刊物：Dalton Transactions

期号：21

卷号：53

影响因子：3.5

DOI码：10.1039/d4dt00595c

所属单位：Department of Chemistry, Tsinghua University

教研室：物理化学

刊物所在地：ENGLAND

摘要：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.

论文编号：WOS:001217748300001

学科门类：理学

一级学科：化学

页面范围：9021-9027

ISSN号：1477-9226

是否译文：否