Electronic structure regulation of Fe-doped Ni2P nanocrystals towards durable electrocatalytic oxygen evolution  

作　　者：Ya Liu Xing Cao Jia-Jia Liu Mei-Sheng Han Gao-Wei Zhang Yu-Bin Zhao Huan-Hui Chen Liang Yu Jun-Rong Zeng Zhi-Kai Cheng Liu-Biao Zhong Li-Juan Song Ye-Jun Qiu 

机构地区：[1]Shenzhen Engineering Lab of Flexible Transparent Conductive Films,School of Materials Science and Engineering,Harbin Institute of Technology,Shenzhen,518055,China [2]School of Physics,Harbin Institute of Technology,Harbin,150001,China [3]Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,518055,China [4]School of Science,Harbin Institute of Technology,Shenzhen 518055,China [5]Guangdong Provincial Key Laboratory of Semiconductor Optoelectronic Materials and Intelligent Photonic Systems,Harbin Institute of Technology,Shenzhen,518055,China

出　　处：《Rare Metals》2024年第12期6405-6415,共11页稀有金属(英文版)

基　　金：financially supported by Shenzhen Bureau of Science,Technology and Innovation Commission(No.JSGG20200914113601003);the National Natural Science Foundation of China(No.51971080)。

摘　　要：The inherent electrocatalytic potential of transition metal phosphides(TMPs)for oxygen evolution is influenced by the reduced efficiency of electron transfer resulting from the interaction between electronegative phosphorus atoms and transition metals.Here,we introduce Fe into Ni_(2)P nanocrystals by thermal injection synthesis method,and anchor them on nickel foam(NF)by facile spraying to prepare self-supporting oxygen evolution reaction(OER)electrocatalyst.Promisingly,the optimized electrode of Ni_(2)P-Fe-2/NF demonstrates low overpotentials of 212 mV with 10 mA·cm^(-2)and a 0.9%decay within300 h test of 50 mA·cm^(-2).Notably,when electrode size was expanded to 600 cm^(2)and applied to a larger electrolyzer,its 9 h decay rate at 6 A current was only 1.69%.Characterization results show that Fe doped NiOOH is generated during OER reaction as actual catalyst,Results from density functional theory(DFT)computations suggest that Fe doping shifts NiOOH d-band center to Fermi level,lowering critical *OOH intermediates formation energy barrier during the OER reaction.These findings inform the large-scale industrial application of TMPs as robust electrocatalysts.

关 键 词：Electronic structure regulation Fe doping Colloidal nanocrystals NI2P Oxygen evolution reaction 

分 类 号：TQ116.2[化学工程—无机化工] O643.36[理学—物理化学]