FeOx-mediated valence-state and interface engineering of Co9S8 with enhanced performance for hydrogen evolution reaction
FeOx-mediated valence-state and interface engineering of Co9S8 with enhanced performance for hydrogen evolution reaction
研究概述
在Co9S8活性位附近引入FeOx水活化中心，调控Co价态、活性氢供应和脱附。优化材料在10 mA/cm²下析氢过电位231 mV，稳定运行48小时；计算显示Fe位点水解离能垒低于Co位点，XAFS及XPS支持组分间电子作用。
谱图与表征信息
Fig. 3. (a) H-D exchange spectra; (b) Co K-edge XANES spectra with Co foil as reference. (c, d) k3-weighted FT-EXAFS spectra of Co9S8-5FeOx/C-1 and Co9S8/C-1 at the Co K-edge. (e) Wavelet transforms (WTs) for k3-weighted Co K-edge EXAFS of Co9S8-5FeOx/C-1 and Co9S8/C-1.