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| Content Provider | Royal Society of Chemistry (RSC) |
|---|---|
| Author | Zheng, Xiangjun Wu, Jiao Tian, Jing-Hua Yang, Ruizhi Yang, Zhenrong Jin, Chao |
| Copyright Year | 2016 |
| Abstract | Phosphorus (P) and cobalt (Co) co-doped reduced graphene oxide (P-Co-rGO) has been developed and studied through a facile electrostatic assembly followed by a pyrolysis process. The prepared P-Co-rGO catalyst shows a great enhancement in the electrocatalytic activity and stability towards the oxygen reduction reaction (ORR) in alkaline solution, characterized with a positive onset potential of 0.89 V (vs. RHE), a negative shifting of only about 12.8 mV of the half-wave potential and the closest diffusion limiting current density (−5.5 mA cm−2) as compared to those of the commercial Pt/C (20 wt%). More interestingly, the prepared P-Co-rGO also exhibits excellent catalytic activity and stability for the oxygen evolution reaction (OER), with a low potential of 1.62 V (vs. RHE) at the current density of 10 mA cm−2 and a maximum current density of almost 30 mA cm−2 at 1.66 V (vs. RHE). Specifically, the prepared P-Co-rGO shows much higher activity and stability than the mono-doped reduced graphene oxide either with P or Co, respectively. This could be ascribed to the modification of the charge and spin densities and the edge and defect effects of the rGO after the co-doping of P and Co, thus resulting in a remarkable enhancement of the electrocatalytic properties for both the ORR and OER. |
| Starting Page | 64155 |
| Ending Page | 64164 |
| Page Count | 10 |
| File Format | HTM / HTML PDF |
| ISSN | 20462069 |
| Volume Number | 6 |
| Issue Number | 69 |
| Journal | RSC Advances |
| DOI | 10.1039/c6ra12438k |
| Language | English |
| Publisher | Royal Society of Chemistry |
| Access Restriction | Open |
| Subject Keyword | Pyrolysis Graphene Redox Oxygen evolution Faradaic current Diffusion Cobalt Electric current ORR |
| Content Type | Text |
| Resource Type | Article |
| Subject | Chemistry Chemical Engineering |
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