矿氧化物作为高效电催化氧化的新平台
Hui Zheng1, Ziwei Ma1, Yunxia Liu2
1Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, International Joint Research Laboratory for Nano Energy Composites, Jiangnan University, Wuxi, 214122, China.
Angewandte Chemie (International ed. in English)
|November 20, 2023
概括
电催化氧化能有效地将转化为酸盐. 在Sr0.9RuO3电催化剂中的氧空位显著提高了氧化反应性能和酸盐产量.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 催化剂是一种催化剂.
背景情况:
- 电催化氧化 (NOR) 为传统的 (N2) 转化为酸盐 (NO3) 的方法提供了可持续的替代方案.
- 目前的NOR过程由于N2激活和竞争氧气演化反应的挑战而遭受缓慢的动力学,低的法拉代效率和低的酸盐产率.
研究的目的:
- 合成和研究一个富含氧气空缺的矿氧化物,Sr0.9RuO3,作为氧化反应的高效电催化剂.
- 阐明氧气空缺在提高NOR性能方面的作用.
主要方法:
- 合成非固态度的矿氧化物Sr0.9RuO3.3.
- 电催化评估NOR性能,包括法拉第效率和酸盐产率.
- 与静止学 SrRuO3.3 的比较.
- 理论模拟以了解反应机制.
主要成果:
- 与SrRuO3.3相比,Sr0.9RuO3的氧气空位度显著更高.
- 电催化剂Sr0.9RuO3实现了高法拉代效率38.6%,酸盐产率为17.9μmol mg-1 h-1.
- 理论模拟表明,氧气空缺降低了N2激活的热力学障碍,使N2OH成为*N2OH,即速度决定的步骤.
结论:
- 在 Sr0.9RuO3 中的氧空位丰富对于增强电催化氧化至关重要.
- 开发的Sr0.9RuO3催化剂为高效和可持续的酸盐生产提供了一个有希望的途径.
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