A fast and in-depth self-reconstruction of anion ligands optimized CoFe-based pre-catalysts for water oxidation  

作　　者：Qiuyan Jin Hao Cui Chengxin Wang 

机构地区：[1]School of Materials Science and Engineering,State Key Laboratory of Optoelectronic Materials and Technologies,Key Laboratory of Low-Carbon Chemistry&Energy Conservation of Guangdong Province,Sun Yat-sen University,Guangzhou,510275,China

出　　处：《Green Energy & Environment》2023年第3期812-819,共8页绿色能源与环境（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (Grants Nos.51772338,51972349,91963210 and U1801255).

摘　　要：The design of efficient and robust non-precious metal electrocatalysts towards oxygen evolution reaction(OER)is of great value for developing green energy technologies.The in-situ formed high-valence(oxy)hydroxides species during the reconstruction process of pre-catalysts are recognized as the real contributing sites for OER.However,pre-catalysts generally undergo a slow and inadequate self-reconstruction.Herein,we reported a PO^(3-)_(4)optimized CoFe-based OER catalysts with amorphous structure,which enables a fast and deep reconstruction during the OER process.The amorphous structure induced by ligands PO^(3-)_(4)is prone to evolution and further form active species for OER.The electron interaction between metal sites can be modulated by electron-rich PO^(3-)_(4),which promotes generation of high active CoOOH.Simultaneously,the etching of PO^(3-)_(4)from the pre-catalysts during the catalytic process is in favor of accelerating the self-reconstruction.As a result,as-prepared precatalyst can generate high active CoOOH at a low potential of 1.4 V and achieve an in-depth reconstructed nanosheet structure with abundant OER active sites.Our work provides a promising design of pre-catalysts for realizing efficient catalysis of water oxidation.

关 键 词：Oxygen evolution reaction Pre-catalysts Reconstruction Anion ligands Bimetallic catalysts 

分 类 号：TQ426[化学工程]