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Facet‐Dependent Activity of Co 3 O 4 Catalyst for C 3 H 8 Combustion
Author(s) -
Yao Junxuan,
Shi Hui,
Sun Dekui,
Lu Huaiqian,
Hou Bo,
Jia Litao,
Xiao Yong,
Li Debao
Publication year - 2019
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201901382
Subject(s) - catalysis , combustion , nanomaterial based catalyst , hydrocarbon , chemistry , oxygen , hydrothermal circulation , facet (psychology) , crystallography , crystal structure , materials science , chemical engineering , organic chemistry , psychology , social psychology , personality , engineering , big five personality traits
Clarifying the facet‐dependent activity of Co 3 O 4 towards C 3 H 8 combustion is of great importance to have a deep understanding of reaction mechanism and develop highly active Co 3 O 4 based catalysts for light hydrocarbon combustion. In this work, four different Co 3 O 4 nanocatalysts which dominantly exposed {100}, {111}, {110} and {112} facets, respectively, were synthesized via hydrothermal method and further tested in C 3 H 8 combustion. The catalytic activity of different crystal planes varied as the order of {111}>{100}>{110}>{112}. The Co 3 O 4 catalyst with {111} facets exhibited the best catalytic performance with T 50 and T 90 as low as 209 and 239 °C, respectively. DRIFT and DFT calculations revealed that the facile activation of C−H bond on Co 3 O 4 {111} planes is responsible for the high activity. Moreover, the higher activity of lattice oxygens and easy activation of gas phase oxygen could also contribute to the excellent catalytic performance.