High stability of oxidation of methanol catalyzed by Pt supported by oxygen-incorporated bamboo-shaped CNTs grown directly on carbon cloth
Resource
International Journal of Hydrogen Energy, 37(14), 10663-10670
Journal
International Journal of Hydrogen Energy
Journal Volume
37
Journal Issue
14
Pages
10663-10670
Date Issued
2012
Date
2012
Author(s)
Wang, Chen-Hao
Du, He-Yun
Hsu, Hsin-Cheng
Chang, Sun-Tang
Huang, Hsin-Chih
Chen, Kuei-Hsien
Abstract
Bamboo-shaped CNTs in which oxygen was incorporated were directly grown on carbon cloth (O-BCNT-CC) by microwave plasma-enhanced chemical vapor deposition. Mixed precursors CH 4/H 2/N 2/O 2 were introduced during the growth process. For comparison, bamboo-shaped CNTs without incorporated oxygen were prepared herein (BCNT-CC). Then, platinum catalysts were prepared on the as-grown O-BCNT-CC (Pt/O-BCNT-CC) and the as-grown BCNT-CC (Pt/BCNT-CC). According to TEM-EELS oxygen mapping, O atoms were uniformly distributed on the O-BCNT surface. Methanol oxidation was performed using Pt/O-BCNT-CC and Pt/BCNT-CC in 1 M methanol and 1 M sulfuric acid by cyclic voltammetry. In the initial cycle, the peak current density of Pt/O-BCNT-CC was almost equal to that of Pt/BCNT, indicating that both had nearly equal activities in the beginning. After 300 cycles, the peak current of Pt/BCNT-CC was reduced to half of the initial peak current owing to platinum-poisoning; however, the peak current of Pt/O-BCNT-CC decayed less. In Pt/O-BCNT-CC, the oxygen-containing functional groups affect the orientation index of crystalline Pt, providing a means of oxidizing methanol and stabilizing Pt catalysts for the long-term. © 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
SDGs
Publisher
Elsevier B.V.
Type
journal article
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