Ni_(3)S_(2)@NiFePx electrode with dual-anion-modulated layer for efficient and stable oxygen evolution  

作　　者：Xijie Chen Keqiang Xu Jinhan Li Xiao Wang Tete Zhao Fangming Liu Meng Yu Fangyi Cheng 

机构地区：[1]Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education),Engineering Research Center of High-efficiency Energy Storage(Ministry of Education),College of Chemistry,Nankai University,Tianjin 300071,China [2]Haihe Laboratory of Sustainable Chemical Transformations,Tianjin 300192,China

出　　处：《Chinese Chemical Letters》2023年第11期291-296,共6页中国化学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(NSFC,Nos.21925503,22102076);the Ministry of Science and Technology of the People’s Republic of China(MOST,No.2022YFA1504001);the Ministry of Education of the People’s Republic of China(MOE,No.B12015);the Fundamental Research Funds for the Central Universities.

摘　　要：The rational construction of high-performance and stable electrocatalyst for oxygen evolution reaction(OER)is a prerequisite for efficient water electrolysis.Herein,we develop a broccoli-like Ni_(3)S_(2)@NiFeP_(x)(Ni_(3)S_(2)@NFP)catalyst on nickel foam(NF)via a sequential two-step layer-by-layer assembly electrodeposition method.X-ray diffraction,in situ Raman and Fourier-transform infrared spectra have mutually validated the element segregation and phase refusion during OER condition.The reconstruction of double layer Ni_(3)S_(2)@NFP facilitates the formation of the active(oxy)hydroxides,which is modulated by the dual anionic layer with mixed sulfate and phosphate ions.As a result,the obtained Ni_(3)S_(2)@NFP electrode exhibits low overpotential(329 mV)and long-term durability(∼500 h)for OER at current density of 500mA/cm^(2).Moreover,the self-supported Ni_(3)S_(2)@NFP can act as an efficient and durable anode in alkaline anion exchange membrane water electrolysis device(AEMWE).This work provides a facile and scaled-up strategy to construct self-supported electrocatalyst and emphasizes the crucial role of anions in pre-catalyst reconstruction and enhancing OER performance.

关 键 词：Oxygen evolution reaction Anion-modulated layer Electrochemical reconstruction PHOSPHIDE SULFIDE Membrane electrode assembly 

分 类 号：O64[理学—物理化学]