Issue 77, 2014

A high-performance Pt–Co bimetallic catalyst with polyethyleneimine decorated graphene oxide as support for hydrolysis of ammonia borane

Abstract

A series of PtxCo1−x bimetallic nanoparticles (NPs) were deposited on polyethyleneimine (PEI) decorated graphene oxide (GO) by a simple co-reduction method. The PEI molecules facilitated the uniform distribution of bimetallic NPs (∼2.3 nm) on GO. PEI–GO/Pt0.17Co0.83 showed extraordinary catalytic properties: a total turnover frequency of 377.83 molH2 min−1 mol−1metal, a hydrogen generation rate of 111.28 LH2 min−1 g−1metal at 298 K, an activation energy of 51.6 kJ mol−1 and good recyclability (∼80% of the original activity after five cycles). The synergistic effect between Pt and Co, and the small size of these NPs play important roles in improving their catalytic properties. Such low-cost, recyclable bimetallic catalysts will enable many practical applications in portable devices and fuel cells.

Graphical abstract: A high-performance Pt–Co bimetallic catalyst with polyethyleneimine decorated graphene oxide as support for hydrolysis of ammonia borane

Supplementary files

Article information

Article type
Paper
Submitted
11 Jun 2014
Accepted
15 Aug 2014
First published
15 Aug 2014

RSC Adv., 2014,4, 41152-41158

Author version available

A high-performance Pt–Co bimetallic catalyst with polyethyleneimine decorated graphene oxide as support for hydrolysis of ammonia borane

M. Li, J. Hu, Z. Chen and H. Lu, RSC Adv., 2014, 4, 41152 DOI: 10.1039/C4RA05607H

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