H* 用Mn-Co(OH)2进行物种规范,用于中性溶液中高效的酸盐电降解
Shaozhen Liang1, Xue Teng1, Heng Xu1
1Shanghai Key Laboratory of Green Chemistry and Chemical Processes, State Key Laboratory of Petroleum Molecular & Process Engineering, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, P. R. China.
一种新型的Mn-doped Co(OH) 2电催化剂在中性条件下有效地将酸盐转化为氨. 这种催化剂显示出高效率和稳定性,抑制不必要的进化反应.
科学领域:
- 电触媒溶解是一种电触媒.
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
背景情况:
- 在中性介质中的电催化酸盐降解 (NO3-RR) 对氨合成至关重要.
- 挑战包括水的激活和抑制进化反应 (HER).
- 控制中间物种 (H*) 结合是关键.
研究的目的:
- 在中性条件下开发一种高效的NO3-RR电催化剂.
- 通过控制H*结合来抑制HER.
- 为了实现高氨产量和能源效率.
主要方法:
- 通过在现场重建合成Mn-doped Co(OH) 2 (Mn-Co(OH) 2).
- 在中性电解质中对Mn-Co(OH) 2进行NO3-RR的电催化测试.
- 催化剂性能的表征,包括法拉第克效率 (FE) 和能源效率 (EE).
主要成果:
- 由于原子间间距的增加,Mn-Co(OH) 2有效地解离水并抑制H*结合.
- 通过NO3-RR通过NH3生产达到98.9±1.7%的高FE和49.90±1.03%的EE.
- 在500小时的时间内,在-200 mA cm-2.0 的温度下,经过显著的稳定性和微不足道的降解.
结论:
- -化Co (OH) 2是一种高效和稳定的电催化剂,用于将酸盐还原为氨.
- 催化剂设计策略有效地抑制了HER并增强了氨的选择性.
- 这项工作为设计用于可持续化学合成的先进电催化剂提供了一种新方法.
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