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Developing hierarchically porous MnOx/NC hybrid nanorods for oxygen reduction and evolution catalysis

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Abstract

Electrochemical oxygen reduction and evolution reactions (ORR and OER) play a vital role in the field of energy conversion and storage. The problem is that both processes are sluggish, requiring precious-metal catalysts. Here, starting from abundant precursors and using a simple synthesis approach, we report the preparation of a good bifunctional oxygen electro-catalyst: a composite nanorod of manganese oxides and nitrogen-doped carbon. This material has hierarchical porosity, facilitating the mass transfer within the electrode. The nitrogen-doped carbon forms contiguous 3D network, connecting the isolated MnOx nanoparticles and ensuring superior electrical conductivity. Importantly, the MnOx particles contain manganese of mixed oxidation states; aligned with the nitrogen-doped carbon, this hybrid is among the best non-noble-metal ORR/OER catalysts in alkaline media, outperforming even Pt and RuO2 catalysts.

Graphical abstract: Developing hierarchically porous MnOx/NC hybrid nanorods for oxygen reduction and evolution catalysis

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Publication details

The article was received on 13 Jan 2017, accepted on 15 Mar 2017 and first published on 15 Mar 2017


Article type: Paper
DOI: 10.1039/C7GC00147A
Citation: Green Chem., 2017, Advance Article
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    Developing hierarchically porous MnOx/NC hybrid nanorods for oxygen reduction and evolution catalysis

    J. Pandey, B. Hua, W. Ng, Y. Yang, K. van der Veen, J. Chen, N. J. Geels, J. Luo, G. Rothenberg and N. Yan, Green Chem., 2017, Advance Article , DOI: 10.1039/C7GC00147A

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