期刊
ADVANCED ENERGY MATERIALS
卷 11, 期 41, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.202102361
关键词
bimetallic nanosheets; electronic structure modulation; hydrogen evolution reaction; overall water splitting; oxygen evolution reaction
类别
资金
- National Natural Science Foundation of China [22176001, 21675001]
- Natural Science Foundation of Anhui Province [1608085MB46]
The study demonstrates the importance of rational design and construction of bifunctional electrocatalysts for water splitting. By optimizing the electronic structure of the active centers, a highly efficient bifunctional electrocatalyst was developed for overall water splitting, achieving significantly improved catalytic activity.
Rational design and construction of bifunctional electrocatalysts with excellent activity and durability is imperative for water splitting. The regulation of the local electronic structure of the active metal sites in polymetallic composites provides a basic idea. Herein, the ultrathin bimetallic molybdate nanosheets are evenly deposited on the CuOx hollow nanotubes on the copper foam substrate to form a hierarchical heterostructure, which can be used as an efficient bifunctional electrocatalyst for overall water splitting. Experimental results prove that the introduction of Ni to form a double metal salt molybdate and CuOx heterostructure design can be optimized by Co cation as best electronic structure of electric catalytic activity center, and can effectively promote the generation of CoOOH active phase at the same time, so that can skillfully optimize the binding strength between the Co site and the oxygen-containing intermediate, and enhancing catalytic activity. When it is used in the overall water splitting of a double-electrode alkaline electrolytic cell, the cell voltage of CoNiMoO4-21/CuOx/CF is 1.532 V at 50 mA cm(-2), far exceeding most of the reported conventional bifunctional electrocatalyst. This work has contributed to understanding the central active sites of polymetallic composites and has provided a useful value for the design of efficient electrocatalysts.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据