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Tuning the Surface Composition of Ni/ meso ‐CeO 2 with Iridium as an Efficient Catalyst for Hydrogen Generation from Hydrous Hydrazine
Author(s) -
Qiu YuPing,
Yin Hui,
Dai Hao,
Gan LiYong,
Dai HongBin,
Wang Ping
Publication year - 2018
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201705923
Subject(s) - catalysis , bimetallic strip , calcination , iridium , hydrazine (antidepressant) , materials science , decomposition , hydrogen , hydrogen production , chemical engineering , alloy , inorganic chemistry , chemistry , metallurgy , organic chemistry , chromatography , engineering
Selective decomposition of hydrous hydrazine (N 2 H 4 ⋅ H 2 O) over metal catalysts provides a promising means for onboard or portable hydrogen source applications. Studies on N 2 H 4 ⋅ H 2 O 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 ‐CeO 2 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 ‐CeO 2 catalyst shows excellent catalytic performance towards hydrogen generation from N 2 H 4 ⋅ H 2 O, which compares favorably with the Ni−Ir bimetallic catalysts reported to date.