在金属氧化物支上形成强金属支相互作用的多元合金
Jianyu Han1,2, Jingyi Yang1, Zhixin Zhang1
1State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116000, P. R. China.
Journal of the American Chemical Society
|October 9, 2023
概括
一种新的合成策略使用强金属支相互作用 (SMSI) 在较低温度下制造多元合金 (MA) 催化剂. 这种方法提高了甲燃烧的催化活性和稳定性,而不会损坏支结构.
科学领域:
- 材料科学
- 催化剂
- 纳米技术
背景情况:
- 多元合金 (MA) 通过稳定提供多个活性位点,非常适合高性能催化剂.
- 传统的MA合成需要恶劣的条件,导致支持降解和减少催化剂协同作用.
- 在不损害支完整性的情况下,开发低温合成方法对MA催化剂至关重要.
研究的目的:
- 提出并验证使用强金属支相互作用 (SMSI) 的多元合金催化剂的新合成策略.
- 在可降解氧化物支上演示低温合成 (400-600 °C) 的MA催化剂.
- 调查SMSI在促进MA形成和提高催化性能方面的作用.
主要方法:
- 在MA形成过程中利用SMSI创建氧气空隙道.
- 在受控的低降解温度下合成---铁 (PtPdCoFe) MA.
- 评估甲燃烧的催化活性和稳定性
主要成果:
- 在SMSI的帮助下,在400-600°C的TiO2上成功合成PtPdCoFeMA.
- 合成的MA催化剂对甲燃烧具有良好的活性和稳定性.
- 这种以SMSI为媒介的策略在不同的支物和合金组合中被证明是多功能性的.
结论:
- 在可降解氧化物上实现低温MA催化剂合成的关键因素是SMSI.
- 这种整体设计策略避免了支失效,并提高了MA催化剂的性能.
- 这些发现为MA形成机制提供了新的见解,并提供了通用的综合方法.
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