Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 24, Issue 19, Pages 4902-4908Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201705923
Keywords
alloys; heterogeneous catalysis; hydrogen; iridium; surface analysis
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Funding
- National Natural Science Foundation of China [51471168, 51671087, 11504303]
- Foundation for Innovative Research Groups of the National Natural Science Foundation of China [51621001]
- Foundation for Research Groups of the Natural Science Foundation of Guangdong Province [2016A030312011]
- 985 Project of South China University of Technology
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Selective decomposition of hydrous hydrazine (N2H4 center dot H2O) over metal catalysts provides a promising means for onboard or portable hydrogen source applications. Studies on N2H4 center dot H2O decomposition catalysts mainly focus on the effects of bulk composition and structure on their performances, instead of the surface-composition-dependent properties. Herein, the synthesis of an Ir-modified Ni/meso-CeO2 catalyst is reported by using a combination of colloidal solution combustion synthesis and galvanic replacement methods. A combination of structural characterization, control experiments, and DFT calculations reveals that the Ni-Ir alloy resulting from calcination treatment exerts a profound effect on the catalytic properties. The resulting Ni@Ni-Ir/meso-CeO2 catalyst shows excellent catalytic performance towards hydrogen generation from N2H4 center dot H2O, which compares favorably with the Ni-Ir bimetallic catalysts reported to date.
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