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

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Abstract

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 2 O 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 2 SO 4 , Pt/OMC-H 2 O 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 2 SO 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 2 SO 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 2 O 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 2 O 2 samples were observed to have superior electrocatalytic activity for oxygen reduction reaction as compared to synthesized Pt/OMC, Pt/OMC-H 2 SO 4 , Pt/OMC-AEPTMS and the commercial electrocatalysts (Pt supported on XC-72).

Original languageEnglish
Pages (from-to)16994-17001
Number of pages8
JournalInternational Journal of Hydrogen Energy
Volume37
Issue number22
DOIs
Publication statusPublished - 2012 Nov 1

Fingerprint

Self assembly
self assembly
Platinum
platinum
Carbon
Oxygen
carbon
oxygen
synthesis
Oxidation
oxidation
Nanoparticles
nanoparticles
acids
electrical resistivity
Acids
electrocatalysts
Electrocatalysts
Fourier transformation
Surface treatment

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

Cite this

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title = "Synthesis and characterization of platinum supported on surface-modified ordered mesoporous carbons by self-assembly and their electrocatalytic performance towards oxygen reduction reaction",
abstract = "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 2 O 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 2 SO 4 , Pt/OMC-H 2 O 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 2 SO 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 2 SO 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 2 O 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 2 O 2 samples were observed to have superior electrocatalytic activity for oxygen reduction reaction as compared to synthesized Pt/OMC, Pt/OMC-H 2 SO 4 , Pt/OMC-AEPTMS and the commercial electrocatalysts (Pt supported on XC-72).",
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AB - 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 2 O 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 2 SO 4 , Pt/OMC-H 2 O 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 2 SO 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 2 SO 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 2 O 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 2 O 2 samples were observed to have superior electrocatalytic activity for oxygen reduction reaction as compared to synthesized Pt/OMC, Pt/OMC-H 2 SO 4 , Pt/OMC-AEPTMS and the commercial electrocatalysts (Pt supported on XC-72).

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