Mesoporous Co3O4 as an electrocatalyst for water oxidation

Tüysüz, Harun; Hwang, Yun Jeong; Khan, Sher Bahader; Asiri, Abdullah Mohamed; Yang, Peidong

doi:10.1007/s12274-012-0280-8

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Mesoporous Co₃O₄ as an electrocatalyst for water oxidation

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Tüysüz, Harun
Research Group Tüysüz, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Hwang, Yun Jeong
Research Department Schüth, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Yang, Peidong
Research Department Schüth, Max-Planck-Institut für Kohlenforschung, Max Planck Society;
The Center of Excellence for Advanced Materials Research (CEAMR ), Chemistry Department, King Abdulaziz University, Jeddah, 21589, Saudi Arabia ;

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Citation

Tüysüz, H., Hwang, Y. J., Khan, S. B., Asiri, A. M., & Yang, P. (2013). Mesoporous Co₃O₄ as an electrocatalyst for water oxidation. Nano Research, 6(1), 47-54. doi:10.1007/s12274-012-0280-8.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0014-A339-2

Abstract

Mesoporous Co₃O₄ has been prepared using porous silica as a hard template via a nanocasting route and its electrocatalytic properties were investigated as an oxygen evolution catalyst for the electrolysis of water. The ordered mesostructured Co₃O₄ shows dramatically increased catalytic activity compared to that of bulk Co₃O₄. Enhanced catalytic activity was achieved with high porosity and surface area, and the water oxidation overpotential (η) of the ordered mesoporous Co₃O₄ decreases significantly as the surface area increases. The mesoporous Co₃O₄ also shows excellent structural stability in alkaline media. After 100 min under 0.8 V (versus Ag/AgCl) applied bias, the sample maintains the ordered mesoporous structure with little deactivation of the catalytic properties.