@article {45369,
	title = { Spin state engineered ZnxCo3-xO4 as an efficient oxygen evolution electrocatalyst },
	journal = {Physical Chemistry Chemuical Physics},
	volume = {20},
	year = {2018},
	month = {DEC},
	pages = {29452-29461},
	type = {Article },
	abstract = {Oxygen evolution is the key step in the oxidation of water in electrolyzers and photoelectrochemical cells for the production of hydrogen. Developing a non-precious metal oxide catalyst with good electrocatalytic activity for the oxygen evolution reaction (OER) is very challenging. In this work, nanostructured ZnxCo3-xO4 has been shown as an efficient catalyst with a low overpotential for the OER in 0.1 M KOH solution. Substitution of Co2+ in the spinel oxide Co3O4 with Zn2+ creates a higher number of high-spin Co3+, which is found to be directly correlated with the OER activity of ZnxCo3-xO4. Zn0.8Co2.2O4 (x = 0.8) with the optimum amount of Co2+/Co3+ and high-spin Co3+ content showed a very low overpotential of approximate to 250 mV, at 10 mA cm(-2), with a turnover frequency of approximate to 3 x 10(-3) s(-1) for the OER. The high Faradaic efficiency along with the stability of Zn0.8Co2.2O4 and electrocatalytic activity comparable with that of precious metal oxides indicate that this composition is a promising catalyst for water oxidation.},
	issn = {1463-9076},
	doi = {10.1039/c8cp06641h},
	author = {Ramsundar, Rani Mohan and Pillai, Vijayamohanan Kunjukrishna and Joy, Pattayil Alias}
}
