Synthesis of macroscopic SiC nanowires at the gram level and their electrochemical activity with Pt loadings
✍ Scribed by Jun Jie Niu; Jian Nong Wang
- Publisher
- Elsevier Science
- Year
- 2009
- Tongue
- English
- Weight
- 1004 KB
- Volume
- 57
- Category
- Article
- ISSN
- 1359-6454
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✦ Synopsis
Macroscopic SiC nanowires (SiCNWs) were successfully synthesized at the gram level (2-4 g h À1 ) by using a simple solid-vapor reaction of silicon powders and carbon oxides, assisted by ZnS. This results in a promising material for a wide range of applications. The obtained products possess a small size of 10-30 nm and a good single-crystal structure. In addition, a specific surface area of 1.6 m 2 g À1 was achieved. A high electrochemical activity to H 2 adsorption/desorption and methanol oxidation was observed from cyclic voltammograms in H 2 SO 4 and H 2 SO 4 /CH 3 OH solutions after loading with 50 wt.% Pt. Furthermore, a high catalytic performance for oxygen reduction at $0.57 V and good chemical stability were displayed. The novel SiCNW-supported catalyst shows potential for fuel cells with long lifetimes.