Spinel Mn–Co Oxide in N-Doped Carbon Nanotubes as a Bifunctional Electrocatalyst Synthesized by Oxidative Cutting
- 14 May 2014
- journal article
- research article
- Published by American Chemical Society (ACS) in Journal of the American Chemical Society
- Vol. 136 (21), 7551-7554
- https://doi.org/10.1021/ja502532y
Abstract
The notorious instability of non-precious-metal catalysts for oxygen reduction and evolution is by far the single unresolved impediment for their practical applications. We have designed highly stable and active bifunctional catalysts for reversible oxygen electrodes by oxidative thermal scission, where we concurrently rupture nitrogen-doped carbon nanotubes and oxidize Co and Mn nanoparticles buried inside them to form spinel Mn-Co oxide nanoparticles partially embedded in the nanotubes. Impressively high dual activity for oxygen reduction and evolution is achieved using these catalysts, surpassing those of Pt/C, RuO2, and IrO2 and thus raising the prospect of functional low-cost, non-precious-metal bifunctional catalysts in metal-air batteries and reversible fuel cells, among others, for a sustainable and green energy future.Keywords
Funding Information
- Deutsche Forschungsgemeinschaft (EXC 1069)
This publication has 17 references indexed in Scilit:
- Oxygen Reduction Electrocatalyst Based on Strongly Coupled Cobalt Oxide Nanocrystals and Carbon NanotubesJournal of the American Chemical Society, 2012
- Engineering manganese oxide/nanocarbon hybrid materials for oxygen reduction electrocatalysisNano Research, 2012
- Manganese dioxide nanotube and nitrogen-doped carbon nanotube based composite bifunctional catalyst for rechargeable zinc-air batteryElectrochimica Acta, 2012
- Covalent Hybrid of Spinel Manganese–Cobalt Oxide and Graphene as Advanced Oxygen Reduction ElectrocatalystsJournal of the American Chemical Society, 2012
- Co3O4 nanocrystals on graphene as a synergistic catalyst for oxygen reduction reactionNature Materials, 2011
- Facile Construction of Manganese Oxide Doped Carbon Nanotube Catalysts with High Activity for Oxygen Reduction Reaction and Investigations into the Origin of their Activity EnhancementACS Applied Materials & Interfaces, 2011
- A Bifunctional Nonprecious Metal Catalyst for Oxygen Reduction and Water OxidationJournal of the American Chemical Society, 2010
- Supportless Pt and PtPd Nanotubes as Electrocatalysts for Oxygen‐Reduction ReactionsAngewandte Chemie, 2007
- Development of Supported Bifunctional Electrocatalysts for Unitized Regenerative Fuel CellsJournal of the Electrochemical Society, 2002
- Electrocatalysis in the anodic evolution of oxygen and chlorineElectrochimica Acta, 1984