异质结
催化作用
析氧
材料科学
氧气
电子
曲面重建
光电子学
纳米技术
曲面(拓扑)
化学
电极
物理
物理化学
电化学
生物化学
几何学
有机化学
量子力学
数学
作者
Ze Sheng Lu,Jingkun Wang,Pengfei Zhang,Wenhao Guo,Yongqing Shen,Peizhi Liu,Jianlong Ji,Huayun Du,Min Zhao,Haojie Liang,Junjie Guo
标识
DOI:10.1016/j.apcatb.2024.124073
摘要
As promising non-noble candidates for oxygen evolution reaction (OER), NiFe-based layered double hydroxides (NiFe-LDH) has been proven to transform into its high-oxidation-state Ni/Fe oxyhydroxide, which act as the primary active sites. However, advancing the emergence of high-oxidation-state Ni/Fe oxyhydroxide during OER process currently remains a challenge. Herein, a novel 2D NiFe-LDH/stanene p-n junction catalyst is achieved by inserting stanene between NiFe-LDH and Ni foam. In-situ Raman spectra and density functional theory calculations (DFT) confirm that stanene not only benefits for the construction of built-in electric field, but also serves as an electron absorber to induce a directed electron transport from Ni, Fe to Sn, which thus facilitates the surface reconstruction to form the catalytically active Ni/FeOOH. Consequently, an ultralow OER overpotential (230 mV) at 100 mA cm-2 is achieved, corresponding to a considerable decrease of 22.3% and 42.1% compared with the individual NiFe-LDH and stanene, respectively. This work provides a promising avenue for the development of efficient OER catalysts for water electrolysis.
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