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Architecture of PtCo Bimetallic Catalysts for Catalytic CO Oxidation
Author(s) -
Xu Hong,
Fu Qiang,
Guo Xiaoguang,
Bao Xinhe
Publication year - 2012
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.201200255
Subject(s) - catalysis , nanomaterial based catalyst , bimetallic strip , prox , platinum , chemistry , materials science , heterogeneous catalysis , nanoparticle , inorganic chemistry , chemical engineering , carbon monoxide , nanotechnology , organic chemistry , engineering
PtCo nanocatalysts have been synthesized and tested for both preferential oxidation of CO in excess H 2 (PROX) and CO oxidation in the absence of H 2 (COOX). Structural characterization and reaction results suggest that a PtCo catalyst architecture consisting of Pt nanoparticles decorated with highly dispersed CoO nanostructures is the active structure for both reactions. The highly active “CoO‐on‐Pt” catalysts can be prepared by reduction of as‐prepared PtCo catalysts at an intermediate temperature or by reactivation of an acid‐leached PtCo catalyst at a similar temperature. A comparative study of PtFe, PtCo, and PtNi catalysts reveals that interface confinement effects are dominant in all “TMO x ‐on‐Pt” systems (TM=Fe, Co, and Ni). However, the activity and stability in both PROX and COOX reactions for each of these catalyst systems is variable.