无形化和高 (Ni/Fe/Cu/Zn) 调整在MIL-88上 (Co) 允许在现场不可逆转地将一个活跃的CoOOH层转变为超的OER效率
Jian-Yong Zhang1, Xiao-Lu Chen1, Qian Wang1
1School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, P. R. China.
ACS applied materials & interfaces
|December 28, 2025
概括
我们开发了一种新的无形,高金属有机框架 (MOF) 催化剂,可以重建成活性相,显著提高氧演化反应 (OER) 性能和各种电解质的稳定性.
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
- 催化剂是一种催化剂.
背景情况:
- 传统的晶体金属有机框架 (MOFs) 具有刚性结构,在氧化演化反应 (OER) 期间限制活性部位的可访问性.
- 在OER条件下的结构重建对于增强催化活性至关重要,但在晶体MOF中经常受到阻碍.
研究的目的:
- 开发一种新型无形,高的金属有机框架 (aHE-MOF) 催化剂,具有增强的结构适应性,以提高开放式可再生能源的性能.
- 研究无形和高特性对催化活性和稳定性的协同效应.
主要方法:
- 合成一种无形,高的基于Co的MOF (aHE-MOF) 通过将Fe,Ni,Cu和Zn纳入MIL-88 ((Co) 使用2-methylimidazole.
- 在现场表征以观察在OER条件下的结构转变.
- 在性和模拟海水电解质中进行电化学测试.
- 运行拉曼光谱和密度函数理论 (DFT) 计算.
主要成果:
- 在OER条件下,aHE-MOF不可逆转地转化为具有催化作用的CoOOH/aHE-MOF异构.
- 重建后的催化剂表现出优异的OER活性,具有较低的超电位 (191 mV在10 mA·cm−2和333 mV在100 mA·cm−2).
- 实现了大约100小时的特殊长期稳定性,性能降低最小.
结论:
- MOF的无形和高性质有助于结构重建,优化电子特性和中介吸附,以加速OER动力学.
- 将不可逆转的相位转化为CoOOH/aHE-MOF异构结构是提高OER性能和稳定的关键.
- 这项研究提出了一个有前途的策略,用于设计先进的MOF催化剂,用于高效的能量转换应用.
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