析氧
旋转
催化作用
材料科学
磁化
电解质
铁磁性
制氢
动力学
化学工程
化学
自旋(空气动力学)
氢
化学物理
分解水
凝聚态物理
物理化学
电极
磁场
热力学
物理
电化学
工程类
有机化学
光催化
量子力学
生物化学
作者
Riccardo Ruixi Chen,Gao Chen,Xiao Ren,Jingjie Ge,Samuel Jun Hoong Ong,Shibo Xi,Xin Wang,Zhichuan J. Xu
标识
DOI:10.1002/anie.202109065
摘要
The efficiency of electrolytic hydrogen production is limited by the slow reaction kinetics of oxygen evolution reaction (OER). Surface-reconstructed ferromagnetic (FM) catalysts with a spin-pinning effect at the FM/oxyhydroxide interface could enhance the spin-dependent OER kinetics. However, in real-life applications, electrolyzers are operated at elevated temperature, which may disrupt the spin orientations of FM catalysts and limit their performance. In this study, we prepared surface-reconstructed SmCo5 /CoOx Hy , which possesses polarized spins at the FM/oxyhydroxide interface that lead to excellent OER activity. These interfacial polarized spins could be further aligned through a magnetization process, which further enhanced the OER performance. Moreover, the operation temperature was elevated to mimic the practical operation conditions of water electrolyzers. It was found that the OER activity enhancement of the magnetized SmCo5 /CoOx Hy catalyst could be preserved up to 60 °C.
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