CO Adsorption Energy Match at Dual Sites Drives C–C Coupling Activity in Rare Earth–Cu CO2 Reduction Catalysts
CO Adsorption Energy Match at Dual Sites Drives C–C Coupling Activity in Rare Earth–Cu CO2 Reduction Catalysts
研究概述
提出稀土与Cu双位点的*CO吸附能匹配度作为筛选指标，优化CO2还原中的C—C偶联。0.16% Yb掺杂Cu在膜电极中获得65%乙烯法拉第效率，并在超过1.5 A/cm²下稳定50小时；原位表征支持替位Yb参与偶联。
谱图与表征信息
FIGURE 4 Morphology and structural characterization of Yb@Cu-2 during reaction. (a) In situ Cu K-edge XANES spectra of Yb@Cu-2 at all working potential. (b) Cu K-edge Fourier transform EXAFS spectra. (c) Wavelet transform images of EXAFS data with optimized Morlet parameter (i.e., κ = 5, σ = 1) at Cu K-edge for Yb@Cu-2, Cu-foil, Cu2O and CuO. (d) and (e) XPS of Yb@Cu-2 (Cu 2p1/2, Cu 2p3/2) after different working potential. (f) XRD of Yb@Cu-2 after reaction. (g) SEM image of Yb@Cu-2 after reaction. (h) AC-HAADF-STEM image of Yb@Cu-2 at 1 nm after reaction.