Stepwise synthesis, characterization, and electrochemical properties of ordered mesoporous carbons containing well-dispersed Pt nanoparticles using a functionalized template route

被引：12
|
作者：
Liu, Shou-Heng [1 ]
Chen, Shih-Che [1 ]
机构：
[1] Natl Kaohsiung Univ Appl Sci, Dept Chem & Mat Engn, Kaohsiung 80778, Taiwan
来源：
JOURNAL OF SOLID STATE CHEMISTRY | 2011年 / 184卷 / 09期
关键词：
Platinum; Ordered mesoporous carbons; Functionalization; Electrocatalysts; Oxygen reduction reaction; IN-SITU REDUCTION; OXYGEN-REDUCTION; PLATINUM NANOPARTICLES; CATALYST SUPPORT; PARTICLE-SIZE; ELECTROCATALYSTS; NANOTUBES; SURFACE; NANOCLUSTERS; DURABILITY;
D O I：
10.1016/j.jssc.2011.07.016
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
A stepwise method is described for the accurately controlled growth of Pt nanoparticles supported on ordered mesoporous carbons (Pt-OMC) by the nanocasting of carbon and metal precursors in the pore channels of mesoporous silicas functionalized with Si-H groups. Results obtained from N-2 adsorption/desorption isotherms and transmission electron microscopy showed well-dispersed Pt nanoparticles (2-3 nm) on Pt-OMC with high surface area (837 m(2) g(-1)) and regular pore channels (2.9 nm), which facilitate reactant/product diffusion. X-ray diffraction and X-ray photoelectron spectroscopy indicated that Pt nanoparticles in the Pt-OMC sample were mostly present in the metallic form of a face-centered cubic (fcc) crystalline structure. The Pt-OMC catalyst was found to have superior electrocatalytic properties during oxygen reduction reaction as compared to typical commercial electrocatalysts. (C) 2011 Elsevier Inc. All rights reserved.
引用
收藏
页码：2420 / 2427
页数：8
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