Earth-Abundant and Durable Nanoporous Catalyst for Exhaust-Gas Conversion

Takeshi Fujita*, Hideki Abe, Toyokazu Tanabe, Yoshikazu Ito, Tomoharu Tokunaga, Shigeo Arai, Yuta Yamamoto, Akihiko Hirata, Mingwei Chen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


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 finding can possibly pave the way for the design of new catalysts for the conversion of exhaust gas based on the element strategy.

Original languageEnglish
Pages (from-to)1609-1616
Number of pages8
JournalAdvanced Functional Materials
Issue number10
Publication statusPublished - 2016 Mar 8
Externally publishedYes


  • CO oxidation
  • NO reduction
  • environmental transmission electron microscopy
  • heterogeneous catalyst
  • nanoporous metal

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics


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