@article {45597,
	title = {Cobalt-doped Ba2In2O5 brownmillerites: an efficient electrocatalyst for oxygen reduction in alkaline medium},
	journal = {ACS omega },
	volume = {3},
	year = {2018},
	month = {FEB },
	pages = {1710{\textendash}1717},
	type = {Article},
	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.},
	issn = {2470-1343},
	doi = { 10.1021/acsomega.7b01655},
	author = {Jijil, C. P. and Patil, I. M. and Kakade, B. and Nandini Devi, R.}
}
