在工业规模的水电解中,利用非贵金属催化剂优化水道的离子工程
Qisheng Yan1, Cheng Liu2, Weihang Li1
1State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, China.
Nature communications
|November 20, 2025
概括
使用CF3CF2CF2CH2OH的纳离子体的分子工程增强了质子水合物运输,显著提高了高电流密度的质子交换膜水电解 (PEMWE) 非贵金属催化剂的稳定性.
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
- 化学工程是化学工程的重要组成部分.
背景情况:
- 非贵金属催化剂对于工业化质子交换膜水电解 (PEMWE) 是至关重要的,但其活性和稳定性较差.
- 纳离子体中有限的水通道阻碍了质子水合物运输,导致低pH和催化剂溶解,特别是在高电流密度下.
研究的目的:
- 提高PEMWE中非贵金属催化剂的稳定性和性能.
- 通过纳离子离子体的分子工程来优化催化剂层内的质子水合物运输.
主要方法:
- 将一个两性分子 (CF3CF2CF2CH2OH) 引入Nafion离子体,以产生FOH-Nafion.
- 研究FOH-Nafion对质子水合物质量转移和催化剂稳定性的影响.
- 在高电流密度下评估CO基催化剂与FOH-Nafion在高电流密度下的性能.
主要成果:
- 工程FOH-Nafion表现出优化的质子水合物质量转移,这是由于分散的水友和疏水性区域.
- 使用FOH-Nafion的Co3O4催化剂表现出显著改善的稳定性,在830 mA cm-2.2下运行超过270小时.
- 这意味着与原始Nafion离子体相比,操作时间增加了四倍.
结论:
- 离子体水道的分子工程是一种有效的策略,可以提高PEMWE中非贵金属催化剂的性能.
- 开发的FOH-Nafion方法为克服质子水合物运输的局限性和提高催化剂耐用性提供了一条途径.
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