Catalytic activities of Ag/C decorated with small amounts of Au and Pt for glycerol oxidation |
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| Affiliation: | 1. Centro de Investigación y Desarrollo Tecnológico en Electroquímica S. C., Sanfandila, Pedro Escobedo, Querétaro C.P. 76703, Mexico;2. Facultad de Ciencias Químicas, Universidad Autónoma de Nuevo León, Ave. Universidad s/n, Ciudad Universitaria, San Nicolás de los Garza, Nuevo León C.P. 66451, Mexico;3. Centro de Nanociencias y Nanotecnología-UNAM, km. 107 Carr. Tijuana-Ensenada, Ensenada, B.C. C.P. 22860, Mexico;4. Facultad de Ingeniería, División de Investigación y Posgrado, Universidad Autónoma de Querétaro, Querétaro C. P. 76010, Mexico;5. Centro de Investigación en Materiales Avanzados S. C., Complejo Industrial Chihuahua, Chihuahua C. P. 31136, Mexico;1. Centro de Investigación y Desarrollo Tecnológico en Electroquímica S. C., Sanfandila, Pedro Escobedo, Querétaro, C.P. 76703, México;2. Facultad de Ingeniería, División de Investigación y Posgrado, Universidad Autónoma de Querétaro, Querétaro, C. P. 76010, México;3. Centro de Investigación en Materiales Avanzados S. C., Complejo Industrial Chihuahua, Chihuahua, C. P. 31136, México;1. Institute of Physical Chemistry, Bulgarian Academy of Sciences, Sofia, Bulgaria;2. CEST Kompetenzzentrum für elektrochemische Oberflächentechnologie GmbH, Wiener Neustadt, Austria |
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| Abstract: | The two-step decoration of the Ag nanoparticles supported on carbon black (Ag/C) with Au and Pt, the electrooxidation of glycerol on the Pt/Au/Ag/C catalysts in alkaline solution, and the effect of the amounts of Au and Pt on the catalytic activity of Pt/Au/Ag/C are investigated. The decoration of Ag/C is performed by electrochemically depositing a small amount of Au and then Pt on Ag/C, and the Ptx/Auy/Ag100/C catalysts with different x:y:100 ratios (0.15 ≤ x ≤ 1.9 and 0.2 ≤ y ≤ 1.5) are obtained. Physical and electrochemical characterizations reveal that small parts of the Ag surfaces are covered by the deposited Au and Pt. Ptx/Auy/Ag100/C mainly shows Pt-relevant behaviors in glycerol oxidation, and Pt1.3/Auy/Ag100/C exhibits high catalytic activities. The results reveal that the surface decoration is a useful method of fabricating efficient ternary catalysts at low cost. |
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| Keywords: | Decoration Silver nanoparticles Platinum Gold Glycerol |
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