Pt-CeO2/C anode catalyst for direct methanol fuel cells |
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| Affiliation: | 1. Department of Environmental Engineering Science, Graduate School of Science and Technology, Gunma University, 1-5-1, Tenjincho, Kiryu, Gunma 376-8515, Japan;2. Division of Environmental Engineering Science, Gunma University, 1-5-1, Tenjincho, Kiryu, Gunma 376-8515, Japan;1. Energy Convergence Research Center, Korea Institute of Science and Technology (KIST), Hawolgok-dong 39-1, Seongbuk-gu, Seoul 136-791, Republic of Korea;2. Department of Energy and Environmental Engineering, Korea University of Science and Technology (UST), Yuseong-gu, Daejeon 305-333, Republic of Korea;1. CNR-ITAE, Istituto di Tecnologie Avanzate per l''Energia “Nicola Giordano”, Via Salita S. Lucia sopra Contesse 5, 98126, Messina, Italy;2. Department of Chemical and Biological Engineering and Center for Micro-Engineered Materials, Farris Engineering Center, University of New Mexico, Albuquerque, NM 87131, USA;1. School of Natural and Applied Sciences, Northwestern Polytechnical University, Xi''an, 710072, China;2. National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China;3. School of Materials Science and Engineering, Hefei University of Technology, Hefei, 230009, China;4. College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China |
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| Abstract: | In order to develop a cheaper and durable catalyst for methanol electrooxidation reaction, ceria (CeO2) as a co-catalytic material with Pt on carbon was investigated with an aim of replacing Ru in PtRu/C which is considered as prominent anode catalyst till date. A series of Pt-CeO2/C catalysts with various compositions of ceria, viz. 40 wt% Pt-3–12 wt% CeO2/C and PtRu/C were synthesized by wet impregnation method. Electrocatalytic activities of these catalysts for methanol oxidation were examined by cyclic voltammetry and chronoamperometry techniques and it is found that 40 wt% Pt-9 wt% CeO2/C catalyst exhibited a better activity and stability than did the unmodified Pt/C catalyst. Hence, we explore the possibility of employing Pt-CeO2 as an electrocatalyst for methanol oxidation. The physicochemical characterizations of the catalysts were carried out by using Brunauer Emmett Teller (BET) surface area and pore size distribution (PSD) measurements, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM) techniques. A tentative mechanism is proposed for a possible role of ceria as a co-catalyst in Pt/C system for methanol electrooxidation. |
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