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Cyclic Voltammetric Investigation on the Catalysis of Electrodeposited Manganese Oxide on the Electrochemical Reduction of Oxygen (ORR) in Room Temperature Ionic Liquids (RTILs) of 1-Ethyl-3-Methylimidazolium Tetrafluorobroate (EMIBF4) on Glass Carbon (GC) Electrode
| Content Provider | Semantic Scholar |
|---|---|
| Author | Ding, Kunlun Wang, Qinchao Zhao, Muyu |
| Copyright Year | 2007 |
| Abstract | In this preliminary work, for the first time, the electrochemical oxygen reduction reaction (ORR) was investigated using cyclic voltammetry (CV) on the electrodeposited manganese oxide (MnO x)-modified glass carbon electrode (MnO x-GC) at room temperature ionic liquids (RTILs) of EMIBF 4, i.e., 1-ethyl-3-methylimidazolium tetrafluorobroate (EMIBF 4). The results demonstrated that, after being modified by MnO x on GC, the reduction peak current of oxygen was increased to some extent, while the oxidation peak current, corresponding to the oxidation of superoxide anion, O 2 - , was attenuated in some degree, suggesting that MnO x catalyzed ORR in RTILs of EMIBF 4, which is consistent with the results obtained in aqueous solution. To accelerate the electron transfer rate, multi-walled carbon nanotubes (MWCNTs) were modified on GC, and then MnO x was electrodeposited onto the MWCNTs-modified GC electrode to give rise to the MnO x /MWCNTs–modified GC electrode; consequently, the improved standard rate constant, 9s, originated from the modified MWCNTs, along with the modification of electrodeposited MnO x, showed us a satisfactory electrocatalysis for ORR in RTILs of EMIBF 4. In addition, not only for the MnO x-modified GC but also for the MnO x/ MWCNTs-modified GC, there is a novel small oxidation peak appearing at – 0.2 V vs . solid Ag/AgCl, implying that the catalysis of MnOx for ORR in EMIBF 4 is somewhat different from that observed in aqueous solution, though the exact interpretation is not achieved in this preliminary work. Initiating the catalysis of MnO x on ORR in RTILs is the main contribution of this work. Further discussions are in progress. |
| Starting Page | 335 |
| Ending Page | 348 |
| Page Count | 14 |
| File Format | PDF HTM / HTML |
| DOI | 10.4152/pea.200703335 |
| Volume Number | 25 |
| Alternate Webpage(s) | http://www.scielo.gpeari.mctes.pt/pdf/pea/v25n3/v25n3a04.pdf |
| Alternate Webpage(s) | https://doi.org/10.4152/pea.200703335 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
