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- Title
Synthesis and Evaluation of Carbon Nanotubes Supported Silver Catalyst for Alkaline Fuel Cell.
- Authors
Fazil, A.; Chetty, R.
- Abstract
Silver catalysts with three different metal loadings e.g. 10, 20 and 40 wt% were synthesised on carbon nanotubes (Ag/CNT) support by glycerol reduction method. The catalysts were characterised by X-ray diffraction, electron microscopy and thermogravimetric analysis. The average crystalline size of Ag was found between 10 and 16 nm for the metal loading from 10 to 40 wt%. The catalytic activity towards oxygen reduction reaction (ORR) in alkaline solution was studied for the Ag/CNT catalysts in terms of mass activity as well as specific activity. Cyclic voltammetry and rotating disc electrode studies showed higher current density for 40 wt% Ag/CNT catalyst, which maintained suitable durability in potential sweeping cycling in comparison to 10 and 20 wt% Ag/CNT. The fuel cell studies of the synthesized catalysts were conducted using an anion exchange membrane, and all the three Ag/CNT catalysts showed open circuit voltage above 1 V with 40 wt% Ag/CNT gave the highest peak power density of 26.1 mW cm−2 at room temperature, in good agreement with the kinetic data obtained from the half-cell studies.
- Subjects
CARBON nanotubes; SILVER catalysts; ALKALINE fuel cells; GLYCERIN; THERMOGRAVIMETRY; ELECTRON microscopy
- Publication
Electroanalysis, 2014, Vol 26, Issue 11, p2380
- ISSN
1040-0397
- Publication type
Article
- DOI
10.1002/elan.201400246