浸渍-液相光沉积Pt/C催化剂的氧还原反应

IF 0.6 4区材料科学 Q4 ELECTROCHEMISTRY

Journal of New Materials For Electrochemical Systems Pub Date : 2010-01-01 DOI:10.14447/JNMES.V13I3.148

B. Ruíz-Camacho, M. Valenzuela, J. A. Pérez-Galindo, F. Pola, M. Miki-Yoshida, N. Alonso‐Vante, R. González-Huerta

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引用次数: 6

摘要

采用光沉积法和浸渍法合成了5 wt.% Pt负载碳催化剂，并对其氧还原反应进行了电化学评价。采用室温紫外光(365 nm)照射Pt前驱体(H2PtCl6和C10H14O4Pt)制备了纳米铂。在相同的操作条件下，H2PtCl6光还原成金属铂(Pt4+→Pt2+→Pt0)的速度比C10H14O4Pt (Pt2+→Pt0)快。采用XRD、EDS、H2化学吸附、TEM、循环伏安法和线性伏安法对样品进行了表征。XRD和TEM/EDS研究表明，与H2PtCl6相比，C10H14O4Pt光沉积法制备的Pt颗粒更小，在碳上的分散性更高。当采用浸渍法时，发现了类似的行为。与H2PtCl6前驱体相比，C10H14O4Pt的铂粒度更小。用C10H14O4Pt光沉积法合成的Pt/C催化剂在氧还原反应中的催化活性与10 wt. % Pt/C, ETEK催化剂相当。

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Oxygen Reduction Reaction on Pt/C Catalysts Prepared by Impregnation and Liquid Phase Photo-Deposition

Pt/C catalysts supported on carbon (5 wt.% Pt) synthesized by photo-deposition and impregnation methods were electrochemi- cally evaluated in the oxygen reduction reaction. Platinum nanoparticles were prepared by photo-irradiation of Pt precursors (H2PtCl6 and C10H14O4Pt) with UV-irradiation (365 nm) at room temperature. The photo-reduction of H2PtCl6 to metallic platinum (Pt4+→Pt2+→Pt0) was faster than C10H14O4Pt (Pt2+→Pt0) at the same operation conditions. The Pt/C samples were characterized by XRD, EDS, H2 chemisorption, TEM, cyclic and linear voltammetry techniques. XRD and TEM/EDS studies showed that Pt particles synthesized with C10H14O4Pt by the photo-deposition method were smaller with a higher dispersion on carbon than those prepared with H2PtCl6. A similar behavior was found when the impregnation method is used. The platinum particle size was smaller with C10H14O4Pt as compared to H2PtCl6 precursor. The Pt/C catalyst synthesized with C10H14O4Pt by the photo-deposition method displayed a catalytic activity in the oxy- gen reduction reaction comparable to a commercial 10 wt. % Pt/C, ETEK catalyst.

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来源期刊

Journal of New Materials For Electrochemical Systems ELECTROCHEMISTRY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

1.90

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： This international Journal is intended for the publication of original work, both analytical and experimental, and of reviews and commercial aspects related to the field of New Materials for Electrochemical Systems. The emphasis will be on research both of a fundamental and an applied nature in various aspects of the development of new materials in electrochemical systems.