TY - JOUR
T1 - Earth-Abundant and Durable Nanoporous Catalyst for Exhaust-Gas Conversion
AU - Fujita, Takeshi
AU - Abe, Hideki
AU - Tanabe, Toyokazu
AU - Ito, Yoshikazu
AU - Tokunaga, Tomoharu
AU - Arai, Shigeo
AU - Yamamoto, Yuta
AU - Hirata, Akihiko
AU - Chen, Mingwei
N1 - Funding Information:
This study was mainly sponsored by JST-PRESTO "New Materials Science and Element Strategy" and the research funds of "World Premier International (WPI) Research Center Initiative for Atoms, Molecules and Materials," MEXT (Japan), and partly supported by KAKENHI 25708036. The authors thank the Institute for Material Research at Tohoku University for the XPS and ICP-AES measurements, and Prof. S. Yamaguchi and Prof. S. Miyoshi at the University of Tokyo for the FTIR experiments. The authors also acknowledge support from the Advanced Characterization Nanotechnology Platform of the High Voltage Electron Microscope Laboratory at Nagoya University.
PY - 2016/3/8
Y1 - 2016/3/8
N2 - 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.
AB - 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.
KW - CO oxidation
KW - NO reduction
KW - environmental transmission electron microscopy
KW - heterogeneous catalyst
KW - nanoporous metal
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U2 - 10.1002/adfm.201504811
DO - 10.1002/adfm.201504811
M3 - Article
AN - SCOPUS:84983110841
VL - 26
SP - 1609
EP - 1616
JO - Advanced Materials for Optics and Electronics
JF - Advanced Materials for Optics and Electronics
SN - 1057-9257
IS - 10
ER -