文献类型：期刊文献

英文题名：Phosphorus and Cobalt Codoped Transition-Metal Oxides with Accelerated Surface Reconstruction for Efficient Alkaline Oxygen Evolution Reactions

作者：Cheng, Junfang[1];Nie, Junyu[1];Li, Xinyi[1];Huang, Jiawei[1];Zhang, Zuyu[1];Feng, Ziye[1];Zhang, Guozhu[2];Wu, Rui[4];Shen, Shuiyun[3];Wei, Guanghua[1];Zhang, Junliang[3]

机构：[1]Shanghai Jiao Tong Univ, SJTU Paris Elite Inst Technol, Shanghai 200240, Peoples R China;[2]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai Key Lab Intelligent Sensing & Detect Tech, Shanghai 200237, Peoples R China;[3]Shanghai Jiao Tong Univ, Inst Fuel Cells, Sch Mech Engn, Shanghai 200240, Peoples R China;[4]Shanghai Jiao Tong Univ, Sch Mech Engn, Shanghai 200240, Peoples R China

年份：2025

卷号：41

期号：10

起止页码：6872

外文期刊名：LANGMUIR

收录：;EI(收录号：20251018008918);WOS:【SCI-EXPANDED(收录号:WOS:001437074100001)】；

基金：This work was supported by the Natural Science Foundation of Shanghai Municipality General Project (No. 24ZR1430400), and the authors gratefully acknowledge the support from Instrumental Analysis Center of Shanghai Jiao Tong University.

语种：英文

外文关键词：Bioremediation - Cobalt - Cobalt alloys - Cobalt compounds - Hydrogen evolution reaction - Melt spinning - Molybdenum - Molybdenum alloys - Molybdenum compounds - Oxygen evolution reaction - Semiconductor doping

摘要：Developing highly efficient nonprecious metal catalysts for oxygen evolution reactions (OERs) is crucial for the development of water electrolysis; however, these catalysts face challenges such as high overpotential and insufficient durability at high current densities. In this study, we successfully prepared ordered needlelike structured Co-Fe hydroxide with F-ion immersion (Fe/Co(OH)F) on the surface of nickel foam and explored the synergistic strengthening effects of Mo cation doping and P anion doping. The ordered needlelike structure of Fe/Co(OH)F was destroyed during the phosphating calcination process, while Mo doping transformed it into a rough surface platelike structure. By combining Mo doping with phosphating treatment, the obtained Fe/F-MoCo-PO x catalyst presented a crystalline-amorphous heterostructure and platelike morphology with enhanced OER performance. At a high current density of 200 mA cm-2, the Fe/F-MoCo-PO x catalyst exhibited an overpotential of 300 mV without i-R compensation and maintained a potential decay rate of only 0.16 mV h-1 after a 560 h durability test. Electrochemical testing combined with phase structure and composition analysis revealed that P doping induced the formation of an amorphous surface layer of hypophosphite Fe(PO3)3, which was found to undergo anion exchange with *OH during electrochemical testing. This surface reconstruction thus formed a rich -OH catalytic layer on the surface of Fe/F-MoCo-PO x , which then exhibited a remarkably lowered overpotential and boosted OER kinetics, surpassing most state-of-the-art OER electrocatalysts. This finding underscores the synergistic effect of Mo and P doping in forming a crystalline-amorphous heterostructure, which boosts alkaline OER performance, aiding in cost reduction and improvement of the hydrogen production efficiency through water electrolysis at high current densities.