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Issue 104, 2016, Issue in Progress
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Highly dispersed palladium nanoparticles on poly(N1,N3-dimethylbenzimidazolium)iodide-functionalized multiwalled carbon nanotubes for ethanol oxidation in alkaline solution

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Abstract

Multi-walled carbon nanotubes (MWCNTs) have been considered as good catalyst supporting materials, and their dispersion and functionalization are important, challenging problems for high-performance composite catalysts. Here, poly(N1,N3-dimethylbenzimidazolium)iodide (P(DMBI)-I) was successfully synthesized by methylation of polybenzimidazole (PBI) for the dispersion and functionalization of MWCNTs. The results demonstrate that the novel P(DMBI)-I exhibits a higher dispersion effect for MWCNTs than the original PBI in some typical organic solvents. MWCNTs were wrapped with a thin layer of P(DMBI)-I and achieved functionalization with π–π conjugation and cation–π interaction. Benefiting from the positive charges and imidazole rings of P(DMBI)-I, the palladium nanoparticles/P(DMBI)-I-functionalized MWCNTs hybrid (Pd/P(DMBI)-I-f-MWCNTs) catalyst loaded with highly dispersed palladium nanoparticles was fabricated by in situ reduction. TEM and SEM images demonstrated that when the feed weight ratio of Na2PdCl4 and P(DMBI)-I-f-MWCNTs was 6 : 1, the Pd NPs of Pd/P(DMBI)-I-f-MWCNTs with particle size of ∼2.9 nm were well distributed on P(DMBI)-I-f-MWCNTs in good quantity. The amount of Pd loading on the catalyst of Pd/P(DMBI)-I-f-MWCNTs was about 56.43 wt%. With respect to ethanol oxidation in alkaline solution, the Pd/P(DMBI)-I-f-MWCNTs exhibited higher electrochemical performance and tolerance stability, compared to commercial Pd/C and Pd/PBI-f-MWCNTs.

Graphical abstract: Highly dispersed palladium nanoparticles on poly(N1,N3-dimethylbenzimidazolium)iodide-functionalized multiwalled carbon nanotubes for ethanol oxidation in alkaline solution

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Publication details

The article was received on 29 Jul 2016, accepted on 04 Oct 2016 and first published on 14 Oct 2016


Article type: Paper
DOI: 10.1039/C6RA19256D
Citation: RSC Adv., 2016,6, 102582-102594
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    Highly dispersed palladium nanoparticles on poly(N1,N3-dimethylbenzimidazolium)iodide-functionalized multiwalled carbon nanotubes for ethanol oxidation in alkaline solution

    Y. Lin, Q. Liu, J. Fan, K. Liao, J. Xie, P. Liu, Y. Chen, Y. Min and Q. Xu, RSC Adv., 2016, 6, 102582
    DOI: 10.1039/C6RA19256D

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