A Highly Efficient Monolayer Pt Nanoparticle Catalyst Prepared on a Glass Fiber Surface

Teruyoshi Sasaki,Tadashi Ohtake,Kazufumi Ogawa,Yoshifumi Suzaki,Yusuke Horino

doi:10.3390/catal10050472

Teruyoshi Sasaki, Tadashi Ohtake + Show 3 more

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https://doi.org/10.3390/catal10050472

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Abstract

Over the past few years, various nanoparticle-supported precious metal-based catalysts have been investigated to reduce the emission of harmful substances from automobiles. Generally, precious metal nanoparticle-based exhaust gas catalysts are prepared using the impregnation method. However, these catalysts suffer from the low catalytic activity of the precious metal nanoparticles involved. Therefore, in this study, we developed a novel method for preparing highly efficient glass fiber-supported Pt nanoparticle catalysts. We uniformly deposited a single layer of platinum particles on the support surface using a chemically adsorbed monomolecular film. The octane combustion performance of the resulting catalyst was compared with that of a commercial catalyst. The precious metal loading ratio of the proposed catalyst was approximately seven times that of the commercial catalyst. Approximately one-twelfth of the mass of the proposed catalyst exhibited a performance comparable to that of the commercial catalyst. Thus, the synthesis method used herein can be used to reduce the weight, size, and manufacturing cost of exhaust gas purification devices used in cars.

Highlights

Carbon monoxide, hydrocarbons, nitrogen oxides (NOx ), and particulate matter such as soot are harmful air pollutants emitted from automobiles
Supported precious metal nanoparticle catalysts based on metals such as Pt, Rh, and Pd have been widely investigated [1,2,3,4]
It is difficult to control the nanoparticle diameter using this method. This results in a significant reduction in the effective surface area and catalytic activity of the nanoparticles

Summary

Introduction

Hydrocarbons, nitrogen oxides (NOx ), and particulate matter such as soot are harmful air pollutants emitted from automobiles. To reduce the emission of harmful pollutants from automobiles and meet the demand for energy conservation, researchers have attempted to improve the performance of precious metal catalysts used in automobile exhaust gas purification devices and fuel cells. These catalysts are supported on a porous oxide such as silicon dioxide (silica: SiO2 ) or aluminum oxide (alumina: Al2 O3 ) or a substrate with a large specific surface area such as activated carbon. It is difficult to control the nanoparticle diameter using this method This results in a significant reduction in the effective surface area and catalytic activity of the nanoparticles.

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