Improved H-2 utilization by Pd doping in cobalt catalysts for reductive amination of polypropylene glycol

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Cobalt based catalysts having enhanced H2 dissociation and desorption were synthesized by inserting a trace amount of palladium. These catalysts were used for the reductive amination of polypropylene glycol (PPG) to polyetheramine (PEA). The catalytic activity toward PEA was significantly increased by incorporating an extremely low content of palladium (around 0.01 wt%) into cobalt based catalysts. The Pd inserted cobalt catalysts promoted reduction of cobalt oxide to cobalt metal and inhibited formation of cobalt nitride in the reductive amination. The Pd inserted cobalt catalysts not only enhanced hydrogen dissociation but also accelerated hydrogen desorption by increasing the electron density of cobalt through interaction between cobalt and palladium. These play a critical role in reducing cobalt oxide or cobalt nitride to cobalt metal as an active site for the reductive amination. Thus, the Pd inserted cobalt catalysts provide improved catalytic performance toward PEA production by maintaining the cobalt metal state.
Publisher
ROYAL SOC CHEMISTRY
Issue Date
2020-12
Language
English
Article Type
Article
Citation

RSC ADVANCES, v.10, no.73, pp.45159 - 45169

ISSN
2046-2069
DOI
10.1039/D0RA10033A
URI
http://hdl.handle.net/10203/279520
Appears in Collection
CBE-Journal Papers(저널논문)
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