Issue 12, 2017

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

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

Supplementary files

Article information

Article type
Paper
Submitted
13 jan 2017
Accepted
15 mar 2017
First published
15 mar 2017

Green Chem., 2017,19, 2793-2797

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, 19, 2793 DOI: 10.1039/C7GC00147A

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