Synergistic effect of Nitrogen-doped hierarchical porous carbon/graphene with enhanced catalytic performance for oxygen reduction reaction
| Autor: | Yuhua Shen, Wenjing Yuan, Cun Li, Jiming Song, Dewang Kong, Anjian Xie |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Heteroatom Oxide General Physics and Astronomy chemistry.chemical_element 02 engineering and technology 010402 general chemistry Electrochemistry 01 natural sciences law.invention Catalysis chemistry.chemical_compound law Organic chemistry Graphene Surfaces and Interfaces General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Nitrogen 0104 chemical sciences Surfaces Coatings and Films chemistry Chemical engineering Methanol 0210 nano-technology BET theory |
| Zdroj: | Applied Surface Science. 393:144-150 |
| ISSN: | 0169-4332 |
| DOI: | 10.1016/j.apsusc.2016.10.019 |
| Popis: | Developing efficient and economical catalysts for the oxygen reduction reaction (ORR) is important to promote the commercialization of fuel cells. Here, we report a simple and environmentally friendly method to prepare nitrogen (N) –doped hierarchical porous carbon (HPC)/reduced graphene oxide (RGO) composites by reusing waste biomass (pomelo peel) coupled with graphene oxide (GO). This method is green, low-cost and without using any acid or alkali activator. The typical sample (N-HPC/RGO-1) contains 5.96 at.% nitrogen and larger BET surface area (1194 m 2 /g). Electrochemical measurements show that N-HPC/RGO-1 exhibits not only a relatively positive onset potential and high current density, but also considerable methanol tolerance and long-term durability in alkaline media as well as in acidic media. The electron transfer number is close to 4, which means that it is mostly via a four-electron pathway toward ORR. The excellent catalytic performance of N-HPC/RGO-1 is due to the synergistic effect of the inherent interwoven network structure of HPC, the good electrical conductivity of RGO, and the heteroatom doping for the composite. More importantly, this work demonstrates a good example for turning discarded rubbish into valuable functional products and addresses the disposal issue of waste biomass simultaneously for environment clean. |
| Databáze: | OpenAIRE |
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