| Authors: | Kadakia, Karan Sandeep; Jampani, Prashanth; Velikokhatnyi, Oleg I.; Datta, Moni Kanchan; Chung, Sung Jae; Poston, James A.; Manivannan, Ayyakkannu; Kumta, Prashant N. |
| Title: | Nanostructured (Ir,Sn)O2:F Oxygen Evolution Reaction Anode Electro-Catalyst Powders for PEM Based Water Electrolysis |
| Type: | Journal Article |
| Publisher: | Journal of The Electrochemical Society |
| Year: | 2014 |
| Volume: | 161 |
| Issue: | 9 |
| Start Page: | F868 |
| End Page: | F875 |
| DOI: | 10.1149/2.0381409jes |
| WEB-link: | http://jes.ecsdl.org/content/161/9/F868.abstract |
| Abstract: | Nanostructured powder catalysts comprising solid solutions of F doped SnO2 and IrO2 of different compositions were synthesized by a simple two step approach. High surface area SnO2:F was prepared initially using CTAB as a surfactant. (Ir,Sn)O2:F was then synthesized by forming a solid state solution with IrCl4 and SnO2:F followed by heat-treatment in air at 400°C. The catalyst was then coated onto a porous Ti foil and has been studied as a promising anode electro-catalyst for oxygen evolution reaction (OER) in PEM based water electrolysis. The optimal composition of (Ir0.3Sn0.7)O2:10 wt% F displayed electrochemical activity comparable to the commercially available pure IrO2 demonstrating <70 mol% reduction in noble metal content. The electrochemical stability tests also showed that (Ir,Sn)O2:F solid solution exhibits much better durability compared to commercial IrO2, the standard (OER) catalyst. |
