具有伪D3h对称性的原子精度CoCu异构体,可以实现并列酸盐减少
Akash Prabhu Sundar Rajan1, Jayaraman Theerthagiri1, Piyapa Junmon2
1Department of Chemistry (BK21 FOUR), Research Institute of Advanced Chemistry, Gyeongsang National University, Jinju, Republic of Korea.
一种新型的CoCu催化剂在氧化石烯氧化物上有效地将酸盐污染转化为氨. 这种电催化剂实现了高氨生产率和选择性,为环境修复和化学合成提供了可持续的解决方案.
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.
- 环境科学 环境科学
背景情况:
- 通过电化学方法将酸盐 (eNO3RR) 减少为氨 (NH3) 提供了减少污染物的双重好处和可持续的NH3生产.
- 在eNO3RR中的挑战包括优化酸盐吸附和促进催化表面的气形成.
研究的目的:
- 为高效的eNO3RR.设计一种新的金属-金属-连接物协调催化剂.
- 研究选择性氨合成的催化机制和性能.
- 展示一个混合能源到化学平台,整合氨生产和能源发电.
主要方法:
- 在液体中使用脉冲激光照射合成了一种基化石烯氧化物 (CoCu-HeD/NGO) 上的CoCu异构聚物催化剂.
- 进行了电化学测量 (法拉第效率,生产率).
- 用理论计算和现场光谱电化学分析来阐明反应机制.
- 使用CoCu-HeD/NGO阴极构建了一个Zn-酸盐电池.
主要成果:
- CoCu-HeD/NGO催化剂在NH3时达到91%的法拉代效率,在RHE时达到0.4V,在RHE时达到25mgh-1cm-2的生产率.
- 协同作用的Co-Cu相互作用增强了NO3的吸附,削弱了N-O键,并促进了选择性NH3形成的化中间体.
- 集成的酸电池显示功率密度为5.26mW cm-2和稳定的放电性能.
结论:
- 开发的CoCu-HeD/NGO催化剂代表了eNO3RR.R.的选择性电催化剂设计的重大进步.
- 该研究为混合能源到化学平台建立了一个新范式,将环境修复与可持续的氨合成相结合.
- 协同的催化效应和协同的双站点相互作用是实现氨生产高性能的关键.
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