铜单原子催化剂的协调脱对称化,以有效减少酸盐
Zhengxiang Gu1, Yechuan Zhang1, Yang Fu2
1School of Chemistry and Materials Science, Nanjing Normal University, 210023, Nanjing, China.
我们用Cu-N1O2协调去对称铜单原子催化剂 (SACs),以实现高效的酸盐降解. 这一策略增强了酸盐到氨的转化,为催化剂优化提供了一条新的途径.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
背景情况:
- 单原子催化剂 (SAC) 对于优化催化性能至关重要.
- 铜SAC用于酸盐还原反应 (NO3RR) 通常使用对称的Cu-N4或Cu-N3配置.
- 在SAC中协调环境法规的机制仍然未得到充分探索.
研究的目的:
- 为了研究协调脱对称对铜SAC对NO3RR的影响.
- 通过破坏对称协调来实现高效的酸盐氨转化.
- 阐明协调环境和催化性质之间的相关性.
主要方法:
- 合成 Cu-N1O2 SACs 具有不和的异原子协调 (Cu-O 和 Cu-N).
- 对酸盐转化为氨的效率和产率的电化学评估.
- 现场拉曼光谱和理论计算 (表面二极极矩,轨道杂交) 来研究催化机制.
主要成果:
- -N1O2 SACs 证明了高效的酸盐转化为氨.
- 达到96.5%的法拉代效率 (FE) 和3120μg的NH3h-1cm-2的产率在0.60V和RHE之间.
- 现场拉曼和理论研究表明,它促进了酸盐的积累和选择性酸盐吸附.
结论:
- 在SAC中铜原子的协调脱对称化显著提高了NO3RR的性能.
- -N1O2结构促进了关键中间体的吸附,从而达到高效率.
- 这项工作建立了协调环境和 NO3RR 铜 SAC 中的催化活性之间的明确联系.
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