@article { ISI:000306674200026,
	title = {Disordered brownmillerite Ba2InCeO5+delta with enhanced oxygen reduction activity},
	journal = {Chemistry of Materials},
	volume = {24},
	number = {14},
	year = {2012},
	month = {JUL},
	pages = {2823-2828},
	publisher = {AMER CHEMICAL SOC},
	address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA},
	abstract = {<p>A disordered brownmillerite, Ba2InCeO5+delta, with slight tetragonal distortion from ideal cubic perovskite is synthesized and its oxygen reduction reactivity tested. The material displayed oxygen reduction behavior in alkaline solution comparable to that of standard 40 wt \% Pt/C catalyst and attractive activity characteristics which renders it a potential system for low temperature fuel cell applications.</p>},
	keywords = {brownmillerite, fuel cell, oxygen reduction reaction, Rietveld refinement},
	issn = {0897-4756},
	doi = {10.1021/cm301863x},
	author = {Jijil, Chamundi P. and Unni, SreeKuttan M. and Sreekumar, Kurungot and Devi, R. Nandini}
}
@article {46356,
	title = {Medium modulated oxygen reduction activity of Fe/Co active centre-engrafted electrocatalysts},
	journal = {ChemElectroChem},
	volume = {6},
	year = {2019},
	month = {JUN },
	pages = {2956-2964},
	type = {Article},
	abstract = {<p>Iron and cobalt metal atoms are effective active centers for the synthesis of carbon-based noble-metal-free catalysts for the oxygen reduction reaction (ORR) owing to their cost-effective intrinsic activity and tunable properties. Annealing of the active center with the conducting carbon enhances the ORR activity significantly. Herein, we have engrafted Fe and Co active centers in the homemade conducting carbon and the ORR performance has been closely observed under acidic and basic pH conditions to understand the influence of the medium and participating moieties towards the performance. In the half-cell reaction, the onset potential and half-wave potential for ORR are governed by the surface intermediates and concomitantly driven by the adsorption energies of the intermediates over the active centers. The iron and cobalt active center-engrafted carbon catalyst behaves differently in acidic and basic electrolytes owing to the dissociation of the surface intermediates. The iron-based catalyst shows improved onset potential against the cobalt-based one. Similarly, the cobalt-based catalyst shows improved half-wave potential against the iron active-center-grafted catalyst. The combined synergistic effect of the two catalysts is realized in the composition represented as Fe/2Co-N-GVC, where improved onset and half-wave potentials are noted in basic medium. A significant variation in the activity of the catalyst is observed as the medium changes from acidic to basic and the effect is directly associated with the surface adsorption of the intermediates.</p>
},
	keywords = {active centers, half-wave potential, Mechanism, oxygen reduction reaction, transition state},
	issn = {2196-0216},
	doi = {10.1002/celc.201900260},
	author = {Kashyap, Varchaswal and Anand, Aljo and Soni, Roby and Sreekumar, Kurungot}
}
