Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 26, Issue 10, Pages 1609-1616Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201504811
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Funding
- JST-PRESTO New Materials Science and Element Strategy
- World Premier International (WPI) Research Center Initiative for Atoms, Molecules and Materials, MEXT (Japan)
- KAKENHI [25708036]
- Advanced Characterization Nanotechnology Platform of the High Voltage Electron Microscope Laboratory at Nagoya University
- Grants-in-Aid for Scientific Research [25708036] Funding Source: KAKEN
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Precious metals (Pt and Pd) and rare earth elements (Ce in the form of CeO2) are typical materials for heterogeneous exhaust-gas catalysts in automotive systems. However, their limited resources and high market-driven prices are principal issues in realizing the path toward a more sustainable society. In this regard, herein, a nanoporous NiCuMnO catalyst, which is both abundant and durable, is synthesized by one-step free dealloying. The catalyst thus developed exhibits catalytic activity and durability for NO reduction and CO oxidation. Microstructure characterization indicates a distinct structural feature: catalytically active Cu/CuO regions are tangled with a stable nanoporous NiMnO network after activation. The results obtained by in situ transmission electron microscopy during NO reduction clearly capture the unique reaction-induced self-transformation of the nanostructure. This fi nding can possibly pave the way for the design of new catalysts for the conversion of exhaust gas based on the element strategy.
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