高密度W单个原子在二维脊柱氧化物中打破结构完整性,用于增强氧气进化催化
Yong Wang1,2, Baorui Jia1,3,4, Wanjun Qin1
1Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China.
Journal of the American Chemical Society
|August 20, 2025
概括
这项研究引入了一种新的氧空定位策略,用于制造高效的4d/5d过渡金属单原子催化剂,用于氧演化反应 (OER). 与传统材料相比,新的W-Co3O4催化剂具有更高的活性和稳定性.
科学领域:
- 材料科学
- 电化学
- 催化剂
背景情况:
- 氧化演化反应 (OER) 催化剂的性能依赖于活性位点密度和内在特性,这给设计带来了挑战.
- 开发高效和强大的开放式能源催化剂对于能源转换技术至关重要.
- 像Ni和NiFe这样的现有催化剂在活性和稳定性上有局限性.
研究的目的:
- 开发一种用于OER的基于氧化物的4d/5d过渡金属单原子二维材料的一般策略.
- 调查氧气空位的使用以固定单个原子并提高催化剂性能.
- 评估合成的W-Co3O4材料的催化活性和稳定性.
主要方法:
- 使用Keggin结构多氧金属分解的新氧空隙定策略.
- (W) 单个原子在金属 (Co,Fe,Ni) 氧化物表面的现场粘附.
- 成超薄二维材料 (例如,W-Co3O4),并描述它们的结构和特性.
主要成果:
- 通过M ((OH) x中的氧空位固定单个W原子的均分布.
- W-Co3O4的特定表面积比纯 Co3O4 高5至7倍.
- 催化剂在性介质中达到261mV的低超电位 (η10) 和优异的稳定性 (>290h).
结论:
- 氧空固定策略有效地稳定单个原子并提高催化剂性能.
- 与纯CO3O4相比,OER具有更高的内在活性和结构完整性.
- 这种方法为设计高效和强大的开放式能源催化剂提供了有希望的途径.
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