协同电催化N2 减少对不对称的异质核双 Ru-Fe 站点
Zihao Yang1,2, Chao Feng3, Yifan Liu2,4
1College of Biological and Chemical Engineering, Qilu Institute of Technology, Jinan, 250200, China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|October 14, 2025
概括
一种新的双金属催化剂,在Ti3C2Tx纳米板上具有不对称的和铁协调,可显著增强用于氨基合成的电催化降解反应 (eNRR).
科学领域:
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
- 电化学 电化学 电化学
背景情况:
- 单原子催化剂 (SAC) 在电催化还原 (eNRR) 等多中间体反应中面临缩放限制.
- 开发具有精确控制活性位点的催化剂对于克服这些挑战至关重要.
研究的目的:
- 设计和合成具有不对称协调的异核双原子催化剂,以提高ENRR性能.
- 研究eNRR中不同金属位点之间的协同机制.
主要方法:
- 合成N,S编码的Ti3C2Tx纳米片,这些纳米片装饰着异核Ru-Fe位点 (Fe1-N^S-Ru1/Ti3C2Tx).
- 先进的表征技术来验证不对称的协调结构.
- 对eNRR进行电催化性能测试,包括NH3产率和法拉第效率.
- 实验和理论研究 (例如,DFT计算) 以阐明催化机制.
主要成果:
- Fe1-N^S-Ru1/Ti3C2Tx催化剂的NH3产率为32.8μg h-1 mg-1cat在-0.55V和47.1%的法拉代效率在-0.25V.
- 性能超过了同核类型的3.2倍的活动和3.0倍的选择性.
- 验证了独特的不对称协调,Ru和Fe单独协调到N和S原子,通过桥梁原子相互连接.
- 确定了一种协同作用的机制:Ru站点为质子促进H2O解离,而Fe站点激活N2,解质子供应和N2激活.
结论:
- 设计的异核双原子催化剂有效地克服了eNRR中的缩放关系限制.
- 和铁位点之间的不对称协调和协同电子相互作用显著增强了催化活性和选择性.
- 这项工作为设计用于高效氨合成的先进单原子催化剂提供了新的策略.
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