文献类型：期刊文献

英文题名：Phosphorus doping engineering induces the oxygen defect-rich metallic IrOx layer on the cobalt oxide surface for efficient and stable OER

作者：Li, Xinyi[1];Zhang, Guozhu[2];Nie, Junyu[1];Chen, Hao[1];Feng, Ziye[1];Zheng, Fenghua[3];Wei, Guanghua[1];Shen, Shuiyun[3];Cheng, Junfang[1];Zhang, Junliang[3]

机构：[1]Shanghai Jiao Tong Univ, 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

年份：2025

卷号：48

外文期刊名：MATERIALS TODAY ENERGY

收录：;EI(收录号：20245117544463);WOS:【SCI-EXPANDED(收录号:WOS:001391102400001)】；

基金：This work was supported by the National Natural Science Foundation of China (No. 22372101) and gratefully acknowledge the supports from Research start-up funds and Instrumental Analysis Center of Shanghai Jiao Tong University.

语种：英文

外文关键词：Alkaline OER catalyst; P -doped supported Ir-Based catalyst; Lattice oxygen mechanism; Metal-oxides-support interaction; Low Ir-O covalency

摘要：The development of highly active and stable catalysts for the oxygen evolution reaction (OER) is pivotal for electrochemical water splitting. This study successfully phosphorized IrOx@Co3O4 catalyst and introduced oxygen defect structure, which shifts the reaction pathway towards lattice oxygen mechanism (LOM) to enhance OER activity, while phosphorylation weakens Ir-O covalency, prevents the overoxidation of Ir and optimizes stability issues under the LOM pathway. The obtained catalyst exhibits notable performance in 1 M KOH, achieving an overpotential of 160 mV at 10 mA/cm2 and a mass activity of 2061 A/gIr at an overpotential of 300 mV, with only a 7.0 % decrease in potential after 80 h of operation. The LOM pathway of the catalyst was experimentally conformed and supported by density functional theory (DFT) calculations, which also reveal the P-doping-induced expanding of the gap between the Ir d-band center and the O p-band center. These findings offer valuable insights into improving both the activity and stability of Ir-based catalysts for alkaline water splitting applications, potentially accelerating their commercialization and integration into industrial processes by enhancing their operational efficiency, lifespan, and affordability.