Chinese Journal of Catalysis ›› 2016, Vol. 37 ›› Issue (1): 43-53.DOI: 10.1016/S1872-2067(15)60878-6

• Special Column on New Porous Catalytic Materials • Previous Articles     Next Articles

Ordered mesoporous carbon supported bifunctional PtM (M = Ru, Fe, Mo) electrocatalysts for a fuel cell anode

Chin-Te Hunga, Zih-Hao Lioua,b, Pitchaimani Veerakumara, Pei-Hao Wua, Tuan-Chi Liua, Shang-Bin Liua,c   

  1. a Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan, China;
    b Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan, China;
    c Department of Chemistry, National Taiwan Normal University, Taipei 11677, Taiwan, China
  • Received:2015-03-30 Revised:2015-04-27 Online:2015-12-26 Published:2015-12-26
  • Supported by:

    This work was supported by the Ministry of Science and Technology (NSC98-2113-M-001-017-MY3, NSC101-2113-M-001-020-MY3), Taiwan, China.

Abstract:

The deposition onto an ordered mesoporous carbon (OMC) support of well dispersed PtM (M = Ru, Fe, Mo) alloy nanoparticles (NPs) were synthesized by a direct replication method using SBA-15 as the hard template, furfuryl alcohol and trimethylbeneze as the primary carbon sources, and metal acetylacetonate as the alloying metal precursor and secondary carbon source. The physicochemical properties of the PtM-OMC catalysts were characterized by N2 adsorption-desorption, X-ray diffraction, transmission electron microscopy, X-ray absorption near edge structure, and extended X-ray absorption fine structure. The alloy PtM NPs have an average size of 2-3 nm and were well dispersed in the pore channels of the OMC support. The second metal (M) in the PtM NPs was mostly in the reduced state, and formed a typical core (Pt)-shell (M) structure. Cyclic voltammetry measurements showed that these PtM-OMC electrodes had excellent electrocatalytic activities and tolerance to CO poisoning during the methanol oxidation reaction, which surpassed those of typical activated carbon-supported PtRu catalysts. In particular, the PtFe-OMC catalyst, which exhibited the best performance, can be a practical anodic electrocatalyst in direct methanol fuel cells due to its superior stability, excellent CO tolerance, and low production cost.

Key words: Ordered mesoporous carbon, Platinum-based electrocatalysts, Methanol oxidation reaction, X-ray absorption spectroscopy, Core-shell alloy nanoparticles, Carbon monoxide-stripping voltammetry, Fuel cells