析氧
催化作用
电催化剂
电化学
氧气
铱
材料科学
分解水
化学
化学工程
化学物理
无机化学
纳米技术
物理化学
电极
生物化学
光催化
工程类
有机化学
作者
Wenli Zhao,Fenghua Xu,Zhaoyang Wang,Zhipeng Pan,Yiming Ye,Shiqiang Hu,Baicheng Weng,Rilong Zhu
出处
期刊:Small
[Wiley]
日期:2022-10-30
卷期号:18 (50)
被引量:13
标识
DOI:10.1002/smll.202205495
摘要
The sluggish kinetics of the oxygen evolution reaction (OER) limits the commercialization of oxygen electrochemistry, which plays a key role in renewable energy technologies such as fuel cells and electrolyzers. Herein, a facile and practical strategy is developed to successfully incorporate Ir single atoms into the lattice of transition metal oxides (TMOs). The chemical environment of Ir and its neighboring lattice oxygen is modulated, and the lattice oxygen provides lone-pair electrons and charge balance to stabilize Ir single atoms, resulting in the enhancement of both OER activity and durability. In particular, Ir0.08 Co2.92 O4 NWs exhibit an excellent mass activity of 1343.1 A g-1 and turnover frequency (TOF) of 0.04 s-1 at overpotentials of 300 mV. And this catalyst also displays significant stability in acid at 10 mA cm-2 over 100 h. Overall water splitting using Pt/C as the hydrogen evolution reaction catalyst and Ir0.08 Co2.92 O4 NWs as the OER catalyst takes only a cell voltage of 1.494 V to achieve 10 mA cm-2 with a perfect stability. This work demonstrates a simple approach to produce highly active and acid-stable transition metal oxides electrocatalysts with trace Ir.
科研通智能强力驱动
Strongly Powered by AbleSci AI