分解水
材料科学
电子转移
催化作用
异质结
化学工程
基质(水族馆)
电解质
无定形固体
氢
纳米技术
化学物理
化学
电极
物理化学
结晶学
光电子学
有机化学
光催化
工程类
地质学
海洋学
作者
Z. Y. Wang,Sirong Li,Guofei Zhang,Xin Yu,Zhengyi Zhao,Yipeng Zhang,Yang Shi,Hai‐Bin Zhu,Xuechun Xiao
标识
DOI:10.1016/j.apcatb.2023.123387
摘要
Achieving efficient oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) simultaneously in the electrocatalytic water-splitting is essential to achieve a green hydrogen economy. However, a rational catalyst design still faces great challenges due to the slow kinetic limitations such as electron transfer at the electrode-electrolyte interface. Herein, a porous 3D CoPt3/a-FCWO-NS heterostructures was formed by morphology modulation and interfacial engineering. Notably, the catalyst requires only 1.51 V to achieve 10 mA cm-2 in 1 M KOH, and a commercial 1.5 V cell can drive the overall water-splitting with excellent stability. DFT combined with XPS results reveal the electron transfer between CoPt3 and FeCoW oxides. Due to the ensemble effect CoPt3 exhibits an electron deficient state moderating the slow kinetics of the OER process. Furthermore, the substrate FeCoW oxides modulates the d-band position of CoPt3, and the suitable adsorption energy for hydrogen-containing intermediates makes CoPt3/a-FCWO favorable for the HER process.
科研通智能强力驱动
Strongly Powered by AbleSci AI