Unlocking Synergistic Electron Redistribution via Dual‐Site Reconstruction in Tandem
Unlocking Synergistic Electron Redistribution via Dual‐Site Reconstruction in Tandem
研究概述
静电纺丝–煅烧制备中空立方体网络CuCoOx纳米纤维，原位XAS显示硝酸盐还原时重构为Cu/Co(OH)2活性异质结构。界面电子重排及Co向Cu氢溢流加快反应；−0.4 V下产氨法拉第效率98.7±0.4%，−1.0 V下最大产率109.7±1.1 mg·cm⁻²·h⁻¹。
谱图与表征信息
FIGURE 3 (a) XRD pattern and (b) quasi−in situ XRD patterns of the tandem CuCoOx NFs for the NO3RR. (c) Schematic diagram illustrating the CuCoOx NFs electrochemical reconstruction process. (d) Co K-edge and (e) Cu K-edge operando X-ray absorption near-edge structure (XANES) spectra of the tandem CuCoOx NFs during the NO3RR from the open-circuit potential (OCP) to −0.2 V versus RHE. Operando Fourier-transformed (FT) extended X-ray absorption fine structure (EXAFS) spectra in the R space of (f) the Co K-edge and (g) Cu K-edge during the NO3RR from the OCP to −0.2 V versus RHE. (h–j) Wavelet-transformed (WT) k2-weighted EXAFS spectra of the Cu K-edge recorded during the NO3RR at 0.2, 0.0, and −0.2 V versus RHE.