High Entropy Oxynitride for Anti‐Poisoning Electrocatalytic Nitrogen Reduction
High Entropy Oxynitride for Anti‐Poisoning Electrocatalytic Nitrogen Reduction
研究概述
制备金红石结构的CoFeTiVSnON高熵氧氮化物，通过多金属混合熵与双阴离子调控，形成可动态再生的氮空位。原位谱学和计算支持空位参与的准Mars–van Krevelen固氮机制。−0.5 V下产氨速率159.2 μg·h⁻¹·mg催化剂⁻¹，法拉第效率46.6%，并缓解氨中毒及空位耗尽。
谱图与表征信息
FIGURE 3 Properties of the materials. (a) EPR spectra for the rutile materials. (b) NH3 TPR tests for TiON, TiSnON and HEON. (c) UV–vis curves for TiON, TiSnON and HEON. (d) Fe K-edge XANES, (e) FT-EXAFS spectra and WT-EXAFS contour maps for (f) HEO and (g) HEON. (h) Co K-edge XANES, (i) FT-EXAFS spectra and WT-EXAFS contour maps for (j) HEO and (k) HEON.