一个异质金纳米集群用于有效和选择性电催化降低CO2到CO
Ze-Hua Gao1, Kecheng Wei1, Tao Wu2
1Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States.
Journal of the American Chemical Society
|March 15, 2022
概括
研究人员开发了一种新型的金纳米聚合催化剂,用于有效减少二氧化碳. 这种催化剂在将二氧化碳转化为二氧化碳方面表现出高度活力和稳定性,为可持续能源技术提供了有前途的解决方案.
科学领域:
- 纳米材料化学
- 催化剂
- 电化学
背景情况:
- 鉴定异质催化剂中的活性位点是具有挑战性的,因为难以控制界面化学.
- 黄金纳米集群为催化应用提供可调节的特性.
研究的目的:
- 合成和描述一种新型的异构黄金三化物纳米团.
- 评估其在电化学减少二氧化碳 (CO2) 的性能.
主要方法:
- [Au22H3(dppe) 3 ((PPh3) 8) 3+纳米团的合成.
- 电化学二氧化碳减排实验
- 密度函数理论 (DFT) 的计算.
主要成果:
- Au22H3纳米集群在 - 0.6 V 时表现出 92.7% 的法拉第效率,用于将 CO2 转化为 CO.
- 达到134A/gAu的高质量活动.
- 经过10个小时的运行表现出了显著的稳定性.
- DFT的计算确定了化物协调的Au地点作为活跃的中心.
结论:
- 合成的金三化物纳米聚合物是电化学二氧化碳减排的高度活跃和稳定的催化剂.
- 化物配体在激活二氧化碳转化中的黄金位点中起着至关重要的作用.
- 这种催化剂在利用二氧化碳的黄金电催化剂方面取得了重大进展.
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