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

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,...

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Published in:	Green chemistry : an international journal and green chemistry resource : GC 2017, Vol.19 (12), p.2793-2797
Main Authors:	Pandey, Jay, Hua, Bin, Ng, Wesley, Yang, Ying, van der Veen, Koen, Chen, Jian, Geels, Norbert J, Luo, Jing-Li, Rothenberg, Gadi, Yan, Ning
Format:	Article
Language:	English
Subjects:	Carbon Catalysis Catalysts Electrodes Evolution Nanorods Oxygen Reduction
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container_title	Green chemistry : an international journal and green chemistry resource : GC
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creator	Pandey, Jay Hua, Bin Ng, Wesley Yang, Ying van der Veen, Koen Chen, Jian Geels, Norbert J Luo, Jing-Li Rothenberg, Gadi Yan, Ning
description	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.
doi_str_mv	10.1039/c7gc00147a
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subjects	Carbon Catalysis Catalysts Electrodes Evolution Nanorods Oxygen Reduction
title	Developing hierarchically porous MnOx/NC hybrid nanorods for oxygen reduction and evolution catalysis
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