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Updated: Jan 8, 2026

Synthesis and Testing of Supported Pt-Cu Solid Solution Nanoparticle Catalysts for Propane Dehydrogenation
Published on: July 18, 2017
Photoreduction-Induced Strong Metal-Support Interaction Enables Low-Pt Catalysts for Volatile Organic Compound
Yurong Sun1, Guangxiang Lu1, Rihong Cong1
1College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China.
Abstract:
Developing low-noble-metal, high-efficiency catalysts for volatile organic compound combustion is a pressing challenge. Herein, a Pt/InBO3 catalyst was fabricated via a photoreduction strategy for toluene combustion. Sol-gel-synthesized InBO3 (InBO3-SG) exhibits superior surface properties, including abundant oxygen vacancies, stronger Lewis acidity, and lower basicity. Photoreduction enables the in situ formation of ∼2 nm Pt nanoparticles with a high proportion of metallic Pt0 (∼88%) directly on the support surface, which induces an exceptional Pt utilization efficiency. Unlike conventional high-temperature reducing treatments, strong metal-support interaction (SMSI) can be realized under mild conditions, avoiding some unfavored side-effects. Mechanistically, Pt0 activates O2 to generate reactive oxygen species, while InBO3-SG promotes substrate adsorption, oxygen species migration, and product desorption. This system integrates a functional support and oxygen-activating metal species through SMSI, ensuring efficient toluene combustion. The optimized catalyst achieves a T90 of 227 °C and an average TOFPt of 6.54 × 10-2 s-1 with ultralow Pt loading (0.2 wt %). Notably, T90 can be further reduced to 151 °C by tuning the catalytic conditions. Systematic comparison reveals an inherent trade-off between T90 and TOFPt, highlighting the need for balanced design. Though based on a newly constructed system, the catalyst delivers performance comparable to or exceeding that of state-of-the-art Pt systems, especially regarding Pt utilization efficiency.
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