Boosting the Stability of Oxygen Vacancies in α-Co(OH)_2 Nanosheets with Coordination Polyhedrons as Rivets for High-Performance Alkaline Hydrogen Evolution Electrocatalyst

Li-Wen Jiang; Yuan Huang; Yang ZouChao MengYi XiaoHong LiuJian-Jun Wang

首页> 外文期刊>Advanced energy materials >Boosting the Stability of Oxygen Vacancies in α-Co(OH)_2 Nanosheets with Coordination Polyhedrons as Rivets for High-Performance Alkaline Hydrogen Evolution Electrocatalyst

【24h】

Boosting the Stability of Oxygen Vacancies in α-Co(OH)_2 Nanosheets with Coordination Polyhedrons as Rivets for High-Performance Alkaline Hydrogen Evolution Electrocatalyst

机译：Boosting the Stability of Oxygen Vacancies in α-Co(OH)_2 Nanosheets with Coordination Polyhedrons as Rivets for High-Performance Alkaline Hydrogen Evolution Electrocatalyst

获取原文

获取原文并翻译 | 示例

掌桥外文数据库（机构版） >>

开具论文收录证明 >>

文献代查 >>

页面导航

摘要
著录项
相关主题

摘要

The strong alkaline electrolytes are utilized in various key electrochemicalapplications and the severe corrosion by hydroxyl ions endows the developmentof high-performance electrode materials with a great challenge. Here,an effective strategy is demonstrated to stabilize α-Co(OH)_2 under harsh alkalineelectrochemical condition by coordination polyhedron pinning (MoO_4~(2?),WO_4~(2?)) on the surface for hydrogen evolution reaction (HER). The addition ofMoO_4~(2?) in 1 m KOH can inhibit the attack of hydroxyl ions on oxygen vacanciesin α-Co(OH)_2, and simultaneously modulate the electronic structure ofactive sites for HER. The theoretical calculations and experimental resultsreveal that MoO_4~(2?) can be riveted on the surface of α-Co(OH)_2 to greatly stabilizeoxygen vacancies and inhibit the formation of soluble ions of Co(OH)_3~?.The resultant active sites exhibit reduced maximum energy barriers for theoptimized alkaline HER. Additionally, MoO_4~(2?) near the interface betweenα-Co(OH)_2 and electrolyte can alleviate the accumulation of hydroxyl ions onα-Co(OH)_2 due to the electrostatic repulsion, improving the stability towardHER. This work offers insight into the role of coordination polyhedron ionsin regulating and enhancing the stability of α-Co(OH)_2 for various potentialelectrochemical applications in alkaline electrolyte.

著录项

来源
《Advanced energy materials》 |2022年第43期|2202351.1-2202351.9|共9页
作者
Li-Wen Jiang; Yuan Huang; Yang ZouChao MengYi XiaoHong LiuJian-Jun Wang;
展开▼
作者单位

State Key Laboratory of Crystal MaterialsShandong UniversityJinan, Shandong 250100, China;

State Key Laboratory of Crystal MaterialsShandong UniversityJinan, Shandong 250100, China, Shenzhen Research Institute of Shandong UniversityShenzhen 518057, China;

Institute of Materials ScienceTechnical University of Darmstadt64287 Darmstadt, GermanyState Key Laboratory of Crystal MaterialsShandong UniversityJinan, Shandong 250100, China, Institute for Advanced Interdisciplinary Research (IAIR)University of JinanJinan 250022, China;

展开▼
收录信息
原文格式 PDF
正文语种英语
中图分类
关键词
α-Co(OH)_2; alkaline HER; MoO_4~(2?); oxygen vacancy;

Boosting the Stability of Oxygen Vacancies in α-Co(OH)_2 Nanosheets with Coordination Polyhedrons as Rivets for High-Performance Alkaline Hydrogen Evolution Electrocatalyst

摘要

著录项

相关主题

期刊订阅