Issue 73, 2020

Improved H2 utilization by Pd doping in cobalt catalysts for reductive amination of polypropylene glycol

Abstract

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.

Graphical abstract: Improved H2 utilization by Pd doping in cobalt catalysts for reductive amination of polypropylene glycol

Supplementary files

Article information

Article type
Paper
Submitted
27 Nov 2020
Accepted
11 Dec 2020
First published
22 Dec 2020
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2020,10, 45159-45169

Improved H2 utilization by Pd doping in cobalt catalysts for reductive amination of polypropylene glycol

K. Kim, D. W. Kang, Y. Choi, W. Kim, H. Lee and J. W. Lee, RSC Adv., 2020, 10, 45159 DOI: 10.1039/D0RA10033A

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