Electro-Oxidation of Borohydride on Rhodium, Iridium, and Rhodium–Iridium Bimetallic Nanoparticles with Implications to Direct Borohydride Fuel Cells
IR@CECRI: CSIR-Central Electrochemical Research Institute, Karaikudi
View Archive Info| Field | Value | |
| Title |
Electro-Oxidation of Borohydride on Rhodium, Iridium,
and Rhodium–Iridium Bimetallic Nanoparticles
with Implications to Direct Borohydride Fuel Cells
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| Creator |
Kiran, V.
Ravikumar, T. Kalyanasundaram, N.T. Krishnamurty, S. Shukla, A.K. Sampath, S. |
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| Subject |
Fuel Cells
Nanotechnology |
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| Description |
Electrochemical oxidation of borohydride is studied on nanosized rhodium, iridium, and bimetallic rhodium–iridium catalysts
supported onto Vulcan XC72R carbon. The catalysts are characterized by X-ray diffraction, transmission electron microscopy, and
X-ray photoelectron spectroscopy in conjunction with cyclic voltammetry and polarization studies. The studies reveal that a 20 wt
% bimetallic Rh–Ir catalyst supported onto carbon �Rh–Ir/C� is quite effective for the oxidation of borohydride. Direct borohydride
fuel cell with Rh–Ir/C as the anode catalyst and Pt/C as the cathode catalyst exhibits a peak power density of 270 mW/cm2
at a load current density of 290 mA/cm2 as against 200 mW/cm2 at 225 mA/cm2 for Rh/C and 140 mW/cm2 at 165 mA/cm2
for Ir/C while operating at 80°C. The synergistic catalytic activity for the bimetallic Rh–Ir nanoparticles toward borohydride
oxidation is corroborated by density-functional theory calculations using electron-localization function.
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| Publisher |
The Electrochemical Society
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| Date |
2010
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cecri.csircentral.net/326/1/2010-078.pdf
Kiran, V. and Ravikumar, T. and Kalyanasundaram, N.T. and Krishnamurty, S. and Shukla, A.K. and Sampath, S. (2010) Electro-Oxidation of Borohydride on Rhodium, Iridium, and Rhodium–Iridium Bimetallic Nanoparticles with Implications to Direct Borohydride Fuel Cells. Journal of the Electrochemical Society, 157 (8). B1201-B1208. ISSN 0013-4651 |
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| Relation |
http://cecri.csircentral.net/326/
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