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Efficient stabilization of in situ fabrication of PtxPd1-x nanostructures for electro-oxidation of methanol in alkaline medium
Affiliation:1. Instituto Politécnico Nacional, Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada CICATA, Unidad Altamira, Carretera Tampico-Puerto Industrial, Km 14.5, Altamira, Tamaulipas, C.P.89600, Mexico;2. Instituto Politécnico Nacional, UPIIH, Ciudad Del Conocimiento y La Cultura, Carretera Pachuca-Actopan Km. 1+500, San Agustin Tlaxiaca, Hidalgo, Mexico;3. Departamento de Ingeniería Química, Industrial y de Alimentos, Universidad Iberoamericana, Prolongación Paseo de La Reforma 880, Lomas de Santa Fe, 01219, Ciudad de México, Mexico;4. TecNM, Instituto Tecnológico de Cd, Madero, Ave. Primero de Mayo S/n Col. Los Mangos, Cd. Madero, Tamps, C.P.89440, Mexico;5. Instituto Politécnico Nacional, Centro de Nanociencias Micro y Nanotecnologías, C.P.07300, Ciudad de México, Mexico;6. Instituto Politécnico Nacional, ESIQIE, Departamento de Metalurgia, C.P.07300, Ciudad de México, Mexico;1. Xi''an Jiaotong University, Institute of Refrigeration and Cryogenic Engineering, Xi''an, 710049, China;2. State Key Laboratory of Technologies in Space Cryogenic Propellants, Beijing, 100028, China;1. School of Mechanical Engineering, University of Jinan, Jinan, 250022, China;2. State Key Laboratory of Advanced Welding and Joining & School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China;3. Department of Mechanical Engineering, Shandong Jiaotong University, Jinan, 250022, China;1. College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao, 266109, People''s Republic of China;2. Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shanxi, 712100, People''s Republic of China;1. College of Science, Northeast Agricultural University, Harbin, Heilongjiang, 150030, China;2. College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin 150040, China
Abstract:Different binary PtxPd1-x alloys supported on Vulcan carbon XC-72R were synthesized by the displacement of ligands from organometallic compounds to be used as anodic electrode for methanol electro-oxidation in alkaline medium. The influence of the Pd addition during the synthesis of PtxPd1-x alloys in presence of octylamine as stabilizer was analyzed in terms of structure, chemical composition and electroactivity in the methanol oxidation reaction. The X-ray photoelectron spectroscopy analysis showed that the surface of the electrodes consisted of a metallic mixture and oxide states, which confirmed the change in the electronic properties during the alloy formation. The current density of Pt30Pd70/C during CV measurements was about 2.1 times higher than the one observed with Pt/C electrodes. The CO tolerance was also slightly improved under similar conditions. The work findings indicate that stabilized Pt30Pd70/C binary alloys can be used to design highly active anodic catalysts with potential applications in direct methanol fuel cells (DMFCs).
Keywords:Fuel cells  Methanol oxidation reaction  Alkaline media  Pt-based catalysts  Organometallic method
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