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Title: Effect of Cobalt Particle Size on Acetone Steam Reforming

Carbon-supported cobalt nanoparticles with different particle sizes were synthesized and characterized by complementary characterization techniques such as X-ray diffraction, N-2 sorption, acetone temperature-programmed desorption, transmission electron microscopy, and CO chemisorption. Using acetone steam reforming reaction as a probe reaction, we revealed a volcano-shape curve of the intrinsic activity (turnover frequency of acetone) and the CO2 selectivity as a function of the cobalt particle size with the highest activity and selectivity observed at a particle size of approximately 12.8nm. Our results indicate that the overall performance of acetone steam reforming is related to a combination of particle-size-dependent acetone decomposition, water dissociation, and the oxidation state of the cobalt nanoparticles.
Authors:
; ; ; ;
Publication Date:
OSTI Identifier:
1274888
Report Number(s):
PNNL-SA-115391
Journal ID: ISSN 1867-3880; 47660; KC0302010
DOE Contract Number:
AC05-76RL01830
Resource Type:
Journal Article
Resource Relation:
Journal Name: ChemCatChem; Journal Volume: 7; Journal Issue: 18
Publisher:
ChemPubSoc Europe
Research Org:
Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
carbon; cobalt; hydrogen; nanoparticles; renewable resources; Environmental Molecular Sciences Laboratory