Silica-modified Pt/TiO2 catalysts with tunable suppression of strong metal-support interaction for cinnamaldehyde hydrogenation

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外文摘要：Tuning Strong Metal-support Interactions (SMSI) is a key strategy to obtain highly active catalysts, but conventional methods usually enable TiOx encapsulation of noble metal components to minimize the exposure of noble metals. This study demonstrates a catalyst preparation method to modulate a weak encapsulation of Pt metal nanoparticles (NPs) with the supported TiO2, achieving the moderate sup-pression of SMSI effects. The introduction of silica inhibits this encapsulation, as reflected in the char-acterization results such as XPS and HRTEM, while the Ti4+ to Ti3+ conversion due to SMSI can still be found on the support surface. Furthermore, the hydrogenation of cinnamaldehyde (CAL) as a probe re-action revealed that once this encapsulation behavior was suppressed, the adsorption capacity of the catalyst for small molecules like H2 and CO was enhanced, which thereby improved the catalytic activity and facilitated the hydrogenation of CAL. Meanwhile, the introduction of SiO2 also changed the surface structure of the catalyst, which inhibited the occurrence of the acetal reaction and improved the con-version efficiency of C=O and C=C hydrogenation. Systematic manipulation of SMSI formation and its consequence on the performance in catalytic hydrogenation reactions are discussed.

外文关键词：

Pt catalystSilica modificationHydrogenationCinnamaldehydeStrong metal-support interaction

作者：

Zhengjian Hou、Yuanyuan Zhu、Hua Chi、Li Zhao、Huijie Wei、Yanyan Xi、Lishuang Ma、Xiang Feng、Xufeng Lin

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作者单位：

College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China

Advanced Chemical Engineering and Energy Materials Research Center, China University of Petroleum (East China), Qingdao 266580, China

State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao 266580, China

基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of China-Outstanding Youth foundationFundamental Research Funds for the Central UniversitiesFundamental Research Funds for the Central Universities

项目编号：

21576291220030762232281423CX03007A22CX06012A

出版年：

2024

DOI：

10.1016/j.cjche.2024.03.011

中国化学工程学报(英文版)

中国化工学会

中国化学工程学报(英文版)

CSTPCDEI

影响因子：0.818

ISSN：1004-9541

年,卷(期)：2024.70(6)