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Pt/TiO2 composite nanoparticles synthesized by electron beam irradiation for preferential CO oxidation
Affiliation:1. Grad. Sch. Eng., Osaka University, Yamadaoka 2-1, Suita, Osaka 565-0871, Japan;2. Research Center for Solar Energy Chemistry and Grad. Sch. Eng. Sci., Osaka University, Machikaneyama 1-3, Toyonaka, Osaka 560-8531, Japan;3. Institute for NanoScience Design, Osaka University, Machikaneyama 1-3, Toyonaka, Osaka 560-8531, Japan;1. Laboratório de Eletroquímica e Materiais Nanoestruturados, Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Rua Santa Adélia, 166, 09210-170 Santo André, SP, Brazil;2. Instituto de Pesquisas Energéticas e Nucleares-Comissão Nacional de Energia Nuclear (IPEN-CNEN), Av. Prof. Lineu Prestes, 2242, 05508-900 São Paulo, SP, Brazil;3. Universidade Estadual Paulista Júlio de Mesquita Filho, Instituto de Química de Araraquara Rua Prof. Francisco Degni, 55 Quitandinha, 14800-060 Araraquara, SP, Brazil;1. Department of Chemical & Biomolecular Engineering, University of Illinois – Urbana Champaign, 114 Roger Adams Laboratory, 600 S. Mathews Ave., Urbana, IL 61801, USA;2. Department of Chemical & Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117576, Singapore;1. School of Chemistry and Material Science, Shanxi Normal University, Linfen 041004, China;2. Department of Endocrinology, Beijing Electric Power Hospital, Beijing 10073, China;1. Grupo de Materiales y Sistemas Catalíticos, Departamento de Física (IFISUR) Universidad Nacional del Sur, Av. Alem 1253, Bahía Blanca B8000CP, Argentina;2. Universidad Tecnológica Nacional, 11 de Abril 461, Bahía Blanca B8000CP, Argentina;3. GICIC (Catalysis Science and Engineering Research Group) – INCAPE (Instituto de Investigaciones en Catálisis y Petroquímica), Santiago del Estero 2654, Santa Fe, Argentina
Abstract:This paper describes a novel synthesis method of stabilizer-free Pt/TiO2 composite nanoparticles using electron beam irradiation. The chemical compositions were analyzed by inductively coupled plasma-atomic emission spectroscopy. The microstructures of the samples were observed by using transmission electron microscope. Pt nanoparticles with the sizes of 2–4 nm were deposited on TiO2 without any use of stabilizers. The concentrations of Pt ions and 2-propanol notably affected the size and shape of Pt nanoparticles. Their reactions of preferential CO oxidation were measured in temperature region from 60 to 140 °C. The Pt/TiO2 catalyst with spherical Pt nanoparticles exhibited a 67% of CO conversion rate and 100% of selectivity at a low temperature of 60 °C.
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