Synergistic Dual‐Defect Engineering in Amorphous‐Nanocrystalline Heterostructures for Accelerated Oxygen Evolution
Synergistic Dual‐Defect Engineering in Amorphous‐Nanocrystalline Heterostructures for Accelerated Oxygen Evolution
研究概述
将纳秒激光处理碳纸与脉冲电沉积结合，制备兼具非晶–纳米晶界面及孪晶界的NiFeMo析氧催化剂。10 mA/cm²下过电位196 mV，Tafel斜率18.9 mV/dec；原位拉曼及计算表明两类缺陷协同引导活性物种迁移并降低限速步骤能垒。
谱图与表征信息
FIGURE 5 | Mechanistic insights into the OER activity of NFM@L‐CP. (A–D) XPS spectra of Ni, Fe, Mo, and O in NFM@L‐CP before and after OER. (E, F) In situ Raman spectra of NFM@L‐CP under applied potential in 1 M KOH solution, and schematic illustration of the adsorption evolution mechanism (AEM) reaction pathway. (G–I) XANES and EXAFS spectra of Ni, NiMo, NiFe, and NiFeMo.