Cobalt-doped Ba2In2O5 brownmillerites: an efficient electrocatalyst for oxygen reduction in alkaline medium
| Title | Cobalt-doped Ba2In2O5 brownmillerites: an efficient electrocatalyst for oxygen reduction in alkaline medium |
| Publication Type | Journal Article |
| Year of Publication | 2018 |
| Authors | Jijil, CP, Patil, IM, Kakade, B, R. Devi, N |
| Journal | ACS omega |
| Volume | 3 |
| Issue | 2 |
| Pagination | 1710–1717 |
| Date Published | FEB |
| Type of Article | Article |
| ISSN | 2470-1343 |
| Abstract | A series of compounds with cobalt doping in the indium site of Ba2In2O5 brownmillerites exhibited excellent oxygen reduction activity under alkaline conditions. Doping (25%) retains the brownmillerite structure with disorder in the O3 site in the two-dimensional alternate layer along the ab plane. Further substitution of cobalt in the indium site leads to the loss of a brownmillerite structure, and the compound attains a perovskite structure. Cobalt-doped samples exhibited far better oxygen reduction reaction (ORR) activity when compared to the parent Ba2In2O5 brownmillerite. Among the series of compounds, BaIn0.25Co0.75O3−δ with the highest Co doping and oxygen vacancies randomly distributed in the lattice exhibited the best ORR activity. BaIn0.25Co0.75O3−δ showed a 40 mV positive shift in the onset potential with better limiting current density and a nearly four-electron-transfer reduction pathway when compared to the parent Ba2In2O5 brownmillerite. |
| DOI | 10.1021/acsomega.7b01655 |
| Type of Journal (Indian or Foreign) | Foreign |
| Impact Factor (IF) | 0.75 |
Divison category:
Catalysis and Inorganic Chemistry
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