Synthesis and characterization of platinum supported on surface-modified ordered mesoporous carbons by self-assembly and their electrocatalytic performance towards oxygen reduction reaction

Shou Heng Liu, Jyun Ren Wu

研究成果: Article同行評審

22 引文 斯高帕斯(Scopus)

摘要

Ordered mesoporous carbons (OMCs) were fabricated by an organic-organic self-assembly process. Surface-modified OMCs were also prepared via the conventional acid-oxidation, H 2O 2 oxidation and 3-[2-(2-aminoethylamino)ethylamino]propyltrimethoxysilane (AEPTMS) grafted routes. Pt nanoparticles (NPs) supported on OMC (Pt/OMC) and modified OMC (Pt/OMC-H 2SO 4, Pt/OMC-H 2O 2 and Pt/OMC-AEPTMS) were synthesized and characterized by X-ray diffraction (XRD), Fourier transformation infrared spectroscopy (FTIR), transmission electron microscopy (TEM) analysis. It was found that acid-oxidation (H 2SO 4/HNO 3) method led to formation of a much wider Pt distribution with mean particle size of 6.8 nm. Unlike Pt/OMC-H 2SO 4 samples, Pt NPs (ca. 2.0 nm) were supported uniformly on AEPTMS-modified OMC with low electrical conductivity. Among three surface-modified methods, the H 2O 2 treatment method was an easily controllable way for surface modification of OMC which possesses desirable electrical conductivity, well-dispersed and nanosized Pt (ca. 3 nm). Accordingly, the Pt/OMC-H 2O 2 samples were observed to have superior electrocatalytic activity for oxygen reduction reaction as compared to synthesized Pt/OMC, Pt/OMC-H 2SO 4, Pt/OMC-AEPTMS and the commercial electrocatalysts (Pt supported on XC-72).

原文English
頁(從 - 到)16994-17001
頁數8
期刊International Journal of Hydrogen Energy
37
發行號22
DOIs
出版狀態Published - 2012 11月

All Science Journal Classification (ASJC) codes

  • 可再生能源、永續發展與環境
  • 燃料技術
  • 凝聚態物理學
  • 能源工程與電力技術

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