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强烈的氧化物支持相互作用诱导了Pt单个原子的热稳定,用于持久的催化CO氧化

Shuzhen Li¹, Xuan Luo^2,3,4, Yueshuai Wang⁵

¹Beijing Key Laboratory for Green Catalysis and Separation, College of Materials Science & Engineering, Beijing University of Technology, Beijing, 100124, P.R. China.

Angewandte Chemie (International ed. in English)

|August 12, 2025

概括

在氧化物接口上设计的阴离子空位稳定了单原子催化剂 (SAC) 免受高温烧结的影响. 这一突破使强大,高性能催化剂能够超越可缩减支,扩大工业应用.

科学领域:

材料科学材料科学材料科学
催化剂是一种催化剂.
表面化学表面化学

背景情况:

支持的金属纳米粒子催化剂因高温烧结而面临失活.
高温再分散仅限于可减少的支,限制了催化剂设计.
开发稳定的单原子催化剂 (SAC) 需要克服支材料的局限性.

研究的目的:

在不可还原的氧化物支上设计稳定的单原子催化剂 (SAC).
为了克服传统SAC稳定方法的局限性.
扩大工业级SAC的设计空间.

主要方法:

通过强氧化物支相互作用 (SOSI) 进行界面重建,以创建质子空缺.
使用空位介导的限制以固金属物种 (例如,Pt).
工程 Al2O3-Pt1-La2O3 和 ZrO2-Pt1-La2O3 结构的表征.

主要成果:

成功构建了Al2O3-Pt1-La2O3和ZrO2-Pt1-La2O3结构,具有定义的协调环境.
在145°C以工程催化剂实现了完全的CO转化.
证明了特殊的稳定性,在6小时后在1100°C的蒸汽空气中最小的关闭.

结论:

接口工程与阴性空缺提供了稳定SAC的通用策略.
这种方法克服了支材料的可还原性要求.
扩大了氧化物-氧化物接口的范围,作为工业SAC的坚固的固定平台.

关键词:

在CO氧化过程中,CO的氧化作用.Pt 是单个原子.重建的氧化物接口.强烈的氧化物-支持相互作用.热稳定性热稳定性

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