Gangguo Zhao, Di Zhang, Jianshen Wang, Dan Liu, Fengying Jin, Bin Li, Shiguang Pan, Jiazhong Zang, JianZhou Gui
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A Facile Strategy for Pt Redispersion on TiO2 for Enhanced SMSI Effect and Low-Temperature Reducibility
Particle size is critical in determining the catalytic behavior of noble metal catalysts. It is a significant interest for the rational design of clearly defined catalyst materials to research on noble metal nanoparticles. Herein, a facile prepared method for the Pt/TiO2 catalysts can not only potentially benefit the reuse of industrial catalysts, but also help to reduce the cost of VOC catalytic oxidation. In this work, the calcination of Pt/TiO2 catalyst under N2 atmosphere achieves the redispersion of large Pt particles into small ones (~ 1.4 nm). The Pt/TiO2-400 catalyst (calcinated at 400 °C) with smaller Pt particles and higher concentration of active sites has superior catalytic activity and stability of toluene oxidation, contributing to the strong metal-support interaction, the larger effective metal surface area, the excellent low-temperature reducibility, abundant amounts of Pt0 species and adsorbed oxygen species. This work provides a facile method for metal redispersion of the catalysts, maintaining high activity and excellent stability.
期刊介绍：
Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis.
The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.
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