Understanding the Synthesis of Supported Vanadium Oxide Catalysts Using Chemical Grafting.,Chemistry - A European Journal

当前位置： X-MOL 学术 › Chem. Eur. J. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Understanding the Synthesis of Supported Vanadium Oxide Catalysts Using Chemical Grafting.
Chemistry - A European Journal ( IF 3.9 ) Pub Date : 2019-12-06 , DOI: 10.1002/chem.201904260
Alyssa M Love ₁ , Melissa C Cendejas ₁ , Michael P Hanrahan ₂ , Scott L Carnahan ₂ , Pajean Uchupalanun ₁ , Aaron J Rossini ₃ , Ive Hermans _{1,

3}

Affiliation

The complexity of variables during incipient wetness impregnation synthesis of supported metal oxides precludes an in-depth understanding of the chemical reactions governing the formation of the dispersed oxide sites. This contribution describes the use of vapor phase deposition chemistry (also known as grafting) as a tool to systematically investigate the influence of isopropanol solvent on VO(Oi Pr)3 anchoring during synthesis of vanadium oxide on silica. The availability of anchoring sites on silica was found to depend not only on the pretreatment of the silica but also on the solvent present. H-bond donors can reduce the reactivity of isolated silanols whereas disruption of silanol nests by H-bond acceptors can turn unreactive H-bonded silanols into reactive anchoring sites. The model suggested here can inform improved syntheses with increased dispersion of metal oxides on silica.

中文翻译：

了解使用化学接枝合成负载型氧化钒催化剂。

负载的金属氧化物初湿浸渍合成过程中变量的复杂性使得无法深入了解控制分散氧化物位点形成的化学反应。该贡献描述了气相沉积化学（也称为接枝）作为系统研究氧化钒在二氧化硅上合成过程中对异丙醇溶剂对VO（Oi Pr）3锚定的影响的工具的使用。发现在二氧化硅上锚定位点的可用性不仅取决于二氧化硅的预处理，还取决于存在的溶剂。氢键供体可降低分离的硅烷醇的反应性，而氢键受体破坏硅烷醇巢可将未反应的氢键硅烷醇转变为反应性锚定位。

更新日期：2019-12-06

点击分享查看原文

点击收藏

阅读更多本刊新发论文