在非无害的酸盐缓冲剂中的二铜作为低超电位的同质水氧化速电催化剂
Guilin Ruan1, Pritam Ghosh1, Natalia Fridman1
1Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Technion City, Haifa 32000, Israel.
Journal of the American Chemical Society
|July 9, 2021
概括
一种新型的铜催化剂Cu2 ((BEE) 2有效地催化了可再生燃料的水氧化. 这种催化剂具有创纪录的活性和稳定性, 克服了水电解的关键限制.
科学领域:
- 电化学
- 催化剂
- 可再生能源
背景情况:
- 水电解对于可再生燃料至关重要,但由于高超电位和缓慢的运动性而受到限制.
- 已知双核铜中心和酸盐缓冲器可增强水氧化催化.
- 类,N替代的甘氨酸寡合物,可以稳定高氧化状态的金属离子并形成自组合的复合物.
研究的目的:
- 开发一种高活性和稳定的同质电催化剂,用于氧化水.
- 研究联体和缓冲系统在铜催化水氧化中的作用.
- 报告一个独特的铜复合体,Cu2(BEE) 2,用于高效的水电催化.
主要方法:
- 使用双胺和乙醇组的胺三合体 (BEE) 合成铜胺复合体Cu2{\displaystyle Cu2{\text{BEE}{2}}} .
- 使用单晶X射线衍射,光谱和电化学对Cu2 (BEE) 2进行表征.
- 在pH9.35的酸盐缓冲剂中进行电催化试验,包括受控的电解周期.
主要成果:
- Cu2(BEE) 2具有高催化活性,转换频率为129s−1 (峰值电流) 和5503s−1 (FOWA).
- 催化剂在四个电解周期中表现出极好的稳定性,在2小时内达到51.4的转换率.
- 单个乙醇侧链的对照复合物表现出明显较低的活性 (大小小小2次).
结论:
- 2 (BEE) 2是一种高效和稳定的同质电催化剂,用于氧化水.
- 乙醇侧链在类配体和酸缓冲体上起到增强催化活性和稳定性的关键作用.
- 这些发现为通过水电解生产可再生燃料的先进催化剂铺平了道路.
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