动力学
空位缺陷
材料科学
金属
自旋(空气动力学)
核工程
化学工程
化学
冶金
结晶学
热力学
物理
工程类
量子力学
作者
Jianyong Lou,Junhui Liang,Xin Yao,Ma Hong,Yiqing Zhang,Huayu Chen,Laishun Qin,Yuexiang Huang,Ying Zhao,Da Chen
出处
期刊:ACS applied energy materials
[American Chemical Society]
日期:2024-02-27
标识
DOI:10.1021/acsaem.3c03125
摘要
The efficiency of water splitting is primarily hampered by the sluggish kinetics of the oxygen evolution reaction (OER). Recently, increasing attention has been drawn to leverage spin polarization under an external magnetic field. However, the application of a magnetic field requires additional energy consumption and poses design challenges. Herein, we propose a simple defect engineering strategy aimed at aligning spins in paramagnetic materials to achieve an enhanced intrinsic OER activity. The hydrogenated NiFeP with P vacancies demonstrates elevated saturation magnetization (MS) and reduced overpotential (MS = 5.8 emu/mg, η10 = 303 mV) compared to the untreated NiFeP sample (MS = 1.2 emu/mg, η10 = 341 mV). We elucidate the underlying mechanism of the spin magnetic effect on the OER performance and provide insights into the intricate relationship among vacancies, saturation magnetization, spin state alignment, and oxygenated intermediates. These insights contribute to a better understanding and design of catalysts at the spintronic level, paving the way for more efficient water splitting processes.
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