Unlocking the Catalytic Activity of Iron via Vanadium-Mediated Electronic Structure Tuning in Perovskite Fuel Electrodes
Unlocking the Catalytic Activity of Iron via Vanadium-Mediated Electronic Structure Tuning in Perovskite Fuel Electrodes
研究概述
在铁基钙钛矿LSF的B位引入少量多价V，调控Fe电子结构、降低氧空位形成能，同时通过强V—O键增强晶格稳定性。优化燃料电极用于固体氧化物共电解，CO/H2比例可在1.1–5.0调节，运行超过300小时无积碳或分层。
谱图与表征信息
FIGURE 2 Electronic structure characterization of LSFVx. (a) Fe 2p XPS spectra. (b) V 2p XPS spectra. (c) O 1s XPS spectra. (d) Normalized Fe K-edge XANES spectra. (e) k3-Weighted Fe K-edge FT-EXAFS spectra. (f) Experimental and fitted Fe K-edge FT-EXAFS spectra of LSFV0.05 in R space. (g–i) Wavelet transforms of the k3-weighted Fe K-edge FT-EXAFS spectra of (g) LSFV0.05, (h) Fe2O3, and (i) Fe foil.