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Catalysts 2018, 8(6), 245; https://doi.org/10.3390/catal8060245

Carbon Supported Multi-Branch Nitrogen-Containing Polymers as Oxygen Reduction Catalysts

1
Shandong Key Laboratory of Chemical Energy Storage and Novel Cell Technology, Liaocheng University, Liaocheng 252059, China
2
Dongchang College, Liaocheng University, Liaocheng 252059, China
*
Authors to whom correspondence should be addressed.
Received: 13 May 2018 / Revised: 1 June 2018 / Accepted: 8 June 2018 / Published: 12 June 2018
(This article belongs to the Special Issue Advances in Fuel Cell Catalyst)
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Abstract

A composite catalyst was obtained by covalently linking G4-NH2 dendrimers and 1,10-phenanthroline-5-carboxylic acid on the surface of carbon powder, and the composite was named as PMPhen/C. In order to improve the catalytic performance of the composite, copper ions (II) were introduced to PMPhen/C by complex to form the PMPhen-Cu/C catalyst. Scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS) were applied to investigate the surface microstructure and elemental compositions of the catalysts. The results from electrochemical analysis show that PMPhen/C reduced oxygen to hydrogen peroxide (H2O2) through a two-electron transfer process. PMPhen-Cu/C could reduce oxygen to water through a four-electron pathway. Except the slightly lower initial reduction potential, PMPhen-Cu/C has a comparable oxygen reduction ability (ORR) to that of the commercially available Pt/C catalyst, which makes it a potential candidate as the cathodic catalyst in some fuel cells running in neutral medium, such as a microbial fuel cell. View Full-Text
Keywords: Polyamidoamine (PAMAM) G4-NH2 dendrimers; phenanthroline; covalent link; ORR catalyst Polyamidoamine (PAMAM) G4-NH2 dendrimers; phenanthroline; covalent link; ORR catalyst
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Chu, Y.; Gu, L.; Ju, X.; Du, H.; Zhao, J.; Qu, K. Carbon Supported Multi-Branch Nitrogen-Containing Polymers as Oxygen Reduction Catalysts. Catalysts 2018, 8, 245.

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