金属合金协调加强电子协同在双原子站点大规模的CO2电解
Tingting Cui1,2, Yuchao Wang3, Rufan Xu1
1College of Chemistry, Chemical Engineering & Resource Utilization, Center for Innovative Research in Synthetic Chemistry and Resource Utilization, Northeast Forestry University, Harbin, 150040, China.
将引入双原子催化剂 (DAC) 通过创建B,N协调位点来增强电催化二氧化碳减排 (ECR). 这提高了效率和稳定性,显示了火星燃料生产的潜力.
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:
- 双原子催化剂 (DAC) 在电催化二氧化碳减排 (ECR) 中至关重要.
- 在DAC中实现电子协同,以增强ECR仍然是一个挑战.
- 优化催化剂设计是提高ECR效率和选择性的关键.
研究的目的:
- 通过引入金属合金来开发一种新的增强DAC的战略.
- 研究B,N协调对DAC电子结构和ECR性能的影响.
- 为了证明这种策略在DAC中对各种金属组合的广泛适用性.
主要方法:
- 使用多功能策略合成B,N协同协调的双原子催化剂 (DAC).
- 在膜电极组件 (MEA) 电池中进行电触媒CO2减排 (ECR) 测试.
- 催化剂结构,电子特性和反应机制的表征.
主要成果:
- 尼/BNC催化剂在200 mA cm-2.2时实现了99%的CO法拉第效率和55.7%的能量效率.
- 催化剂在大尺度 (100厘米2) 和低温 (-53°C) 中保持了高性能 (>95%FECO).
- B,N 协调诱导反向电子转移 (Fe→Ni),促进关键反应中间体和促进水分离.
结论:
- B,N 协调策略有效地增强了 DAC 中的电子协同作用,以获得卓越的 ECR 性能.
- 这种方法为开发高效和稳定的二氧化碳转化电催化剂提供了一个有希望的途径.
- 在多种金属系统中展示的多功能性突显了先进的DAC设计的广泛潜力.
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