Spin-state engineering of Co-doped LaMnO3 enhances N2 and H2O activation for chemical-looping ammonia synthesis
Spin-state engineering of Co-doped LaMnO3 enhances N2 and H2O activation for chemical-looping ammonia synthesis
研究概述
以Co掺杂LaMnO3进行水参与的化学链合成氨，通过自旋态和d带调控增强晶格氧迁移、氮气及水活化。常压下1000 ℃固氮、600 ℃释氨，产氨速率866.01 μmol·g⁻¹·h⁻¹，避免外加氢气；仍依赖高温固氮步骤。
谱图与表征信息
Fig. 1. Fine-structure characterizations. (a) Schematic illustration of challenges of ammonia synthesis. (b) The XRD patterns of as-prepared LaMnO3 and LaMn0.5Co0.5O3. (c) HRTEM images of LaMn0.5Co0.5O3. The EDX elemental mapping images of La(d), Mn(e), Co(f) and O(g) of LaMn0.5Co0.5O3. Normalized XANES spectra(h) and Fourier-transformed K-edge EXAFS spectra(i) of Mn in LaMn0.5Co0.5O3. (j) WT plots of LaMn0.5Co0.5O3.