TY - JOUR
T1 - Synthesis and characterization of platinum supported on surface-modified ordered mesoporous carbons by self-assembly and their electrocatalytic performance towards oxygen reduction reaction
AU - Liu, Shou Heng
AU - Wu, Jyun Ren
N1 - Funding Information:
The financial support of the Taiwan National Science Council ( NSC 99-2221-E-151-044-MY2 ) is gratefully acknowledged.
PY - 2012/11
Y1 - 2012/11
N2 - 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).
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 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).
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U2 - 10.1016/j.ijhydene.2012.08.107
DO - 10.1016/j.ijhydene.2012.08.107
M3 - Article
AN - SCOPUS:84867852210
SN - 0360-3199
VL - 37
SP - 16994
EP - 17001
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 22
ER -
