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Anion Structure Regulation of Cobalt Silicate Hydroxide Endowing Boosted Oxygen Evolution Reaction.
Wang, Yang; Li, Longmei; Wang, Shengguo; Dong, Xueying; Ding, Chongtao; Mu, Yang; Cui, Miao; Hu, Tao; Meng, Changgong; Zhang, Yifu.
Afiliación
  • Wang Y; School of Chemistry, Dalian University of Technology, Dalian, 116024, China.
  • Li L; School of Chemistry, Dalian University of Technology, Dalian, 116024, China.
  • Wang S; School of Chemistry, Dalian University of Technology, Dalian, 116024, China.
  • Dong X; School of Chemistry, Dalian University of Technology, Dalian, 116024, China.
  • Ding C; School of Chemistry, Dalian University of Technology, Dalian, 116024, China.
  • Mu Y; School of Chemistry, Dalian University of Technology, Dalian, 116024, China.
  • Cui M; College of Environmental and Chemical Engineering, Dalian University, Dalian, 116622, China.
  • Hu T; School of Chemistry, Dalian University of Technology, Dalian, 116024, China.
  • Meng C; School of Chemistry, Dalian University of Technology, Dalian, 116024, China.
  • Zhang Y; School of Chemistry, Dalian University of Technology, Dalian, 116024, China.
Small ; : e2401394, 2024 May 06.
Article en En | MEDLINE | ID: mdl-38709222
ABSTRACT
Transition metal silicates (TMSs) are attempted for the electrocatalyst of oxygen evolution reaction (OER) due to their special layered structure in recent years. However, defects such as low theoretical activity and conductivity limit their application. Researchers always prefer to composite TMSs with other functional materials to make up for their deficiency, but rarely focus on the effect of intrinsic structure adjustment on their catalytic activity, especially anion structure regulation. Herein, applying the method of interference hydrolysis and vacancy reserve, new silicate vacancies (anionic regulation) are introduced in cobalt silicate hydroxide (CoSi), named SV-CoSi, to enlarge the number and enhance the activity of catalytic sites. The overpotential of SV-CoSi declines to 301 mV at 10 mA cm-2 compared to 438 mV of CoSi. Source of such improvement is verified to be not only the increase of active sites, but also the positive effect on the intrinsic activity due to the enhancement of cobalt-oxygen covalence with the variation of anion structure by density functional theory (DFT) method. This work demonstrates that the feasible intrinsic anion structure regulation can improve OER performance of TMSs and provides an effective idea for the development of non-noble metal catalyst for OER.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Small Asunto de la revista: ENGENHARIA BIOMEDICA Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Alemania
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Small Asunto de la revista: ENGENHARIA BIOMEDICA Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Alemania