自适应无形CoOxCly电催化剂,用于在酸盐水中可持续的演变
Mengjun Xiao1, Qianbao Wu1, Ruiqi Ku2
1Molecular Electrochemistry Laboratory, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054, China.
Nature communications
|September 2, 2023
概括
一种新的无形氧化 (CoOxCly) 催化剂在酸盐水中提高了的进化选择性到100%. 这种催化剂抑制了水的氧化,提高了-行业的稳定性和效率.
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.
背景情况:
- -行业依赖于电化学演化反应 (CER).
- 现有的阳极由于水氧化副作用和酸性介质中的腐蚀而面临限制.
- 开发稳定和选择性阳极用于CER对于工业效率至关重要.
研究的目的:
- 开发一种高度选择性和稳定的催化剂,用于酸盐电解质中的演化反应.
- 了解催化剂增强演变选择性并抑制水氧化的机制.
主要方法:
- 在现场沉积一种无形的CoOxCly催化剂在酸盐电解质中.
- 电化学表征,包括10 mA cm-2的超电位和选择性测量.
- 长期稳定性测试超过500小时.
- 现场光谱研究和理论计算以阐明反应机制.
主要成果:
- 在现场沉积的CoOxCly催化剂实现了~100%的演化选择性.
- 催化剂在10 mA cm-2 的低超电位下运行 ~0.1 V.
- 经过500小时的运行证明了高稳定性.
- 电化学引入离子被证明可以防止的氧化,抑制氧的演变.
结论:
- 无形的CoOxCly催化剂通过Volmer-Heyrovsky路径在Cl受约束的CoO*位点上有效地促进的进化选择性.
- 离子通过稳定的氧化状态来起促进作用,从而抑制水的氧化.
- 这项研究提供了通过利用反应物离子来提高酸盐水中的CER性能的基本见解.
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