Nitrogen-doped carbon nanomaterials as non-metal electrocatalysts for water oxidation

Yong Zhao, Ryuhei Nakamura, Kazuhide Kamiya, Shuji Nakanishi () and Kazuhito Hashimoto
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Yong Zhao: University of Tokyo
Ryuhei Nakamura: Biofunctional Catalyst Research Team, RIKEN Center for Sustainable Resource Science 2-1 hirosawa
Kazuhide Kamiya: University of Tokyo
Shuji Nakanishi: University of Tokyo
Kazuhito Hashimoto: University of Tokyo

Nature Communications, 2013, vol. 4, issue 1, 1-7

Abstract: Abstract Efficient and low-cost electrocatalysts for the oxygen evolution reaction are essential components of renewable energy technologies, such as solar fuel synthesis and providing a hydrogen source for powering fuel cells. Here we report that the nitrogen-doped carbon materials function as the efficient oxygen evolution electrocatalysts. In alkaline media, the material generated a current density of 10 mA cm−2 at the overpotential of 0.38 V, values that are comparable to those of iridium and cobalt oxide catalysts and are the best among the non-metal oxygen evolution electrocatalyst. The electrochemical and physical studies indicate that the high oxygen evolution activity of the nitrogen/carbon materials is from the pyridinic-nitrogen- or/and quaternary-nitrogen-related active sites. Our findings suggest that the non-metal catalysts will be a potential alternative to the use of transition metal-based oxygen evolution catalysts.

Date: 2013
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DOI: 10.1038/ncomms3390

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