酸蚀刻辅助原子工程用于设计用于增强CO2电还原的金属半金属双单原子催化剂
Minghong Huang1,2, Sheng-Hua Zhou2, Cheng-Jie Yang3
1School of Civil and Environmental Engineering, University of Technology Sydney, Ultimo, New South Wales 2007, Australia.
ACS nano
|November 1, 2024
概括
一种新型的催化剂,在添加碳的双单原子位点 (Fe-Se) 上,有效地将二氧化碳转化为二氧化碳. 这种先进的材料使可充电Zn-CO2电池具有很高的选择性和性能.
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:
- 单原子催化剂在电催化二氧化碳转化方面表现有前途.
- 单原子催化剂的可控合成仍然是一个重大挑战.
- 电催化二氧化碳减排对于碳利用和可再生能源储存至关重要.
研究的目的:
- 为混合金属半金属双单原子催化剂开发一个简单的合成策略.
- 为了研究减少二氧化碳的新型催化剂的电催化性能.
- 为了评估催化剂在可充电Zn-CO2电池系统中的应用.
主要方法:
- 酸蚀刻辅助策略用于催化剂制造.
- 催化剂的结构,形态和活性位点的表征 (Fe-Se在多孔添加碳上的双单原子位点 - FeSe-NC).
- 电催化二氧化碳减排性能测试和Zn-CO2电池组装和测试.
- 密度函数理论 (DFT) 计算以阐明反应机制.
主要成果:
- FeSe-NC催化剂表现出单分散活性点和空心纳米结构.
- 实现了异常的催化活性和高的CO选择性 (法拉代克效率>97%),表现优于Fe单原子催化剂.
- 基于FeSe-NC的Zn-CO2电池表现出高功率密度 (2.01 mW cm-2),优异的CO选择性 (>90%),以及循环稳定性.
结论:
- 酸蚀刻策略为合成双单原子催化剂提供了一种可控的方法.
- 双 Fe-Se 位点通过促进 CO 脱吸,协同增强了 CO2 到 CO 的转化.
- 开发的FeSe-NC催化剂是高效电催化二氧化碳减排和储能应用的有希望的候选者.
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