无形的TiOO是一种无形的TiO
Longhai Zhang1, Jiaxi Zhang1, Weiquan Tan1
1The Key Laboratory of Fuel Cell Technology of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China.
研究人员开发了一种用于燃料电池的新型Pt3Ti-TiOx/Ketjen黑色纳米催化剂. 这种催化剂通过将金属间物质与无形氧化物种合起来,提高了甲醇氧化反应的性能和稳定性.
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:
- 金属间化合物是燃料电池的有希望的电催化剂,因为它们的结构有序.
- 在合成基于Pt的金属间化合物和在电催化过程中稳定纳米粒子方面存在挑战.
研究的目的:
- 为燃料电池开发一种稳定且高活性的电催化剂.
- 改进基于Pt的金属间纳米催化剂的合成和性能.
主要方法:
- 合成Ketjen黑色支持的金属间Pt3Ti纳米催化剂与无形TiOx物种 (Pt3Ti-TiOx/KB) 相结合.
- 研究TiOx在纳米粒子封闭和水解离中的作用.
- 对甲醇氧化反应 (MOR) 的电催化试验和耐久性评估.
主要成果:
- 与Pt3Ti-TiOx/KB和Pt/C相比,Pt3Ti-TiOx/KB催化剂对MOR显著增强质量活性 (2.15 A mgPt-1),与Pt3Ti/KB和Pt/C相比.
- 无形TiOx物种限制了Pt3Ti纳米粒子,提高了稳定性.
- 在耐久性测试后观察到大约71%的高质量活动保留.
结论:
- 将基于Pt的间金属与功能性氧化物结合在一起,是开发高性能电催化剂的有效策略.
- Pt3Ti-TiOx/KB催化剂在甲醇氧化过程中表现出卓越的活性和稳定性.
- 这种方法为先进的燃料电池催化剂设计提供了一个有希望的途径.
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