Graphene nanoribbons as a novel support material for high performance fuel cell electrocatalysts |
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| Authors: | Chaonan Wang Hong Li Junhong Zhao Yan Zhu Wang Zhang Yuan Yongming Zhang |
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| Affiliation: | 1. School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;2. School of Chemistry and Chemical Engineering, Anyang Normal University, Anyang 455000, China |
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| Abstract: | Graphene nanoribbons (GNRs) were first used as a novel support material for Pt nanoparticles (NPs) based catalyst for methanol electro-oxidation. Upon oxidation and cutting of multiwall carbon nanotubes (MWCNTs), highly dispersive graphene oxide nanoribbons (GONRs) were obtained, on which metal ions such as PtCl62− can be homogenously deposited. The hybrid catalyst of GNRs supported Pt NPs (Pt/GNR) was further prepared through facile in-situ chemical co-reduction, with a homogeneous distribution of Pt NPs (2–3 nm) on the nanoribbons. Compared to Pt/MWCNT and commercial Pt/XC72R catalysts, Pt/GNR hybrids show much larger electrochemically active surface area, higher electrochemical stability, and better CO tolerance towards electro-oxidation of methanol. Therefore, GNR is a promising alternative two-dimensional support material for electrocatalysts in direct methanol fuel cells. |
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| Keywords: | Graphene nanoribbon Nanohybrid catalyst Electrochemical stability Direct methanol fuel cells |
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