Rational synthesis of highly dispersed and active metal nanoparticles (NP) for application in catalysis has been a hot but challenging research topic. Herein, we report a facile strategy for dispersing and stabilizing noble metal NP in a reducible metal oxide support (e.g., TiO₂) through engineering oxygen vacancies and their anchoring effect. The pre‐reduction of TiO₂ support produces oxygen vacancies, and Pd NP prefer to occupy these vacancies with a strong meal‐support interaction and near metallic state. A near monatomic Pd NP distribution over anatase TiO₂ support is obtained with this strategy. Significant activity enhancement is demonstrated in both oxygen activation and formaldehyde oxidation reactions by this catalyst design method. H₂, NaBH₄ and HCHO are suitable reducing agent for TiO₂, the pre‐reduction catalysts by H₂, NaBH₄ and HCHO shows highly activity for formaldehyde oxidation. Such a work demonstrates support pre‐reduction strategy is a facile way to prepare powerful supported noble metal catalysts.

中文翻译：

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通过工程氧空位在二氧化钛载体上高度分散和活性的Pd纳米颗粒及其锚固效果

合理合成高度分散的活性金属纳米颗粒（NP）应用于催化一直是一个热门但具有挑战性的研究课题。在本文中，我们报告了一种通过工程氧空位及其锚固效应将贵金属NP分散和稳定在可还原金属氧化物载体（例如TiO ₂）中的简便策略。TiO ₂载体的预还原会产生氧空位，而Pd NP倾向于以强的粉体-载体相互作用和接近金属态的方式占据这些空位。用这种策略获得了在锐钛矿型TiO ₂载体上接近单原子的Pd NP分布。通过这种催化剂设计方法，在氧活化和甲醛氧化反应中均显示出显着的活性增强。高₂，NaBH ₄和HCHO是TiO _2的合适还原剂，H ₂，NaBH ₄和HCHO的预还原催化剂对甲醛氧化具有很高的活性。这项工作表明，载体预还原策略是制备功能强大的负载型贵金属催化剂的简便方法。