Designed Precursor for the Controlled Synthesis of Highly Active Atomic and Sub‐nanometric Platinum Catalysts on Mesoporous Silica,Chemistry - An Asian Journal

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Designed Precursor for the Controlled Synthesis of Highly Active Atomic and Sub‐nanometric Platinum Catalysts on Mesoporous Silica
Chemistry - An Asian Journal ( IF 3.5 ) Pub Date : 2018-03-25 , DOI: 10.1002/asia.201800125
Sudipta De ₁ , Maria V. Babak ₂ , Max J. Hülsey ₁ , Wee Han Ang ₂ , Ning Yan ₁

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The development of new methods to synthesize nanometric metal catalysts has always been an important and prerequisite step in advanced catalysis. Herein, we design a stable nitrogen ligated Pt complex for the straightforward synthesis by carbonization of uniformly sized atomic and sub‐nanometric Pt catalysts supported on mesoporous silica. During the carbonization of the Pt precursor into active Pt species, the nitrogen‐containing ligand directed the decomposition in a controlled fashion to maintain uniform sizes of the Pt species. The nitrogen ligand had a key role to stabilize the single Pt atoms on a weak anchoring support like silica. The Pt catalysts exhibited remarkable activities in the hydrogenation of common organic functional groups with turnover frequencies higher than in previous studies. By a simple post‐synthetic treatment, we could selectively remove the Pt nanoparticles to obtain a mixture of single atoms and nanoclusters, extending the applicability of the present method.

中文翻译：

在介孔二氧化硅上可控合成高活性原子和亚纳米铂催化剂的设计前体

合成纳米金属催化剂的新方法的开发一直是高级催化的重要步骤。在本文中，我们设计了一种稳定的氮连接的Pt络合物，用于通过介孔二氧化硅上负载的均一尺寸的原子级和亚纳米级Pt催化剂的碳化来直接合成。在Pt前体碳化为活性Pt物种的过程中，含氮配体以受控方式指导分解，以保持Pt物种的均匀大小。氮配体具有关键作用，可将单个Pt原子稳定在弱锚固载体（如二氧化硅）上。Pt催化剂在常见有机官能团的氢化中表现出显着的活性，其转化频率高于以前的研究。通过简单的合成后处理，

更新日期：2018-03-25

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