Regulating the electronic structure of CoMoO4via La doping for efficient and durable electrochemical water splitting reactions
學年 113
學期 2
出版（發表）日期 2025-03-07
作品名稱 Regulating the electronic structure of CoMoO4via La doping for efficient and durable electrochemical water splitting reactions
作品名稱（其他語言）
著者 Bharathi Arumugam; Erakulan E. Siddharthan; Pandian Mannu; Ranjit Thapa; Chung-Li Dong; Arokia Anto Jeffery; Seong-Cheol Kim
單位
出版者
著錄名稱、卷期、頁數 Journal of Materials Chemistry A 13(9), p.6749-6767
摘要 Metal molybdates (M′MoO4, M = Fe, Co, and Ni) are recognized as active catalysts for water-splitting reactions. However, their poor electronic conductivity and low intrinsic activity hamper overall water-splitting activity and durability, limiting their widespread applications. Herein, the influence of lanthanum doping on the electrocatalysis of CoMoO4 toward overall water-splitting activity and durability in high-pH media was investigated. Varying La-dopant percentages in the CoMoO4 lattice tuned the electrocatalytic activity, and optimal performance was achieved at 5% La_CoMoO4 for hydrogen (η20 at 0.219 VRHE) and oxygen evolution reactions (η20 at 0.272 VRHE). Notably, La doping in CoMoO4 mitigated significant MoO42− leaching in the electrolyte, maintaining excellent structural integrity and demonstrating high durability for over 45 h in a two-electrode system, demanding a cell potential of only 1.68 V toward overall water splitting in 1 M KOH. Structural characterizations and in situ Raman studies established a dynamic surface reconstruction of active components toward the HER/OER. DFT analyses proved the modified electronic structure of CoMoO4 through La doping, effectively optimizing adsorption energies of reactive hydrogen and oxygen intermediates and boosting the intrinsic activity of CoMoO4 toward hydrogen and oxygen evolution reactions (HER/OER). This work depicts the prospect of rare-earth metal incorporation in non-noble metal-based electrocatalysts to design highly efficient and durable electrocatalysts for electrochemical applications.
關鍵字
語言 en
ISSN 2050-7496; 2050-7488
期刊性質 國外
收錄於 SCI
產學合作
通訊作者
審稿制度 是
國別 GBR
公開徵稿
出版型式 ,電子版,紙本
相關連結

機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/129522 )