Benchmarking the Oxygen Reduction Electroactivity of First‐Row Transition‐Metal Oxide Clusters on Carbon Nanotubes
| Autor: | Bingsen Zhang, Dang Sheng Su, Jian Pan, Kuang-Hsu Wu, Qingcong Zeng, Ian R. Gentle, Jiayun Zhang, Mikaela Allen‐Ankins, Dawei Wang |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Oxide 02 engineering and technology Carbon nanotube Overpotential 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Catalysis Oxygen reduction 0104 chemical sciences law.invention Metal chemistry.chemical_compound Transition metal Chemical engineering chemistry law visual_art Electrochemistry visual_art.visual_art_medium Oxygen reduction reaction 0210 nano-technology |
| Zdroj: | ChemElectroChem. 5:1862-1867 |
| ISSN: | 2196-0216 |
| DOI: | 10.1002/celc.201701215 |
| Popis: | Transition-metal oxide/nanocarbon hybrids are known to deliver a cooperative oxygen reduction reaction (ORR) with a synergistic effect of the hybrid interface. This work assesses a series of first-row transition-metal oxides in the form of surface-confined clusters on carbon nanotubes, as a mimic of fully exposed hybrid interfaces, providing an activity benchmark for hybrid catalysts. Among the selected metal oxides, MnOx and CoOx; are found to be the most active first-row transition-metal oxide clusters for the ORR, given their excellent peroxide-reducing capability at low overpotential. FeC, and CuOx are also active for the same role, except their peroxide-reducing activity is only activated with substantial overpotential. Other metal oxides (NiOx and ZnOx) do not appear to show any activity toward the ORR, even with an integrated interface as a source for the possible synergistic effect. |
| Databáze: | OpenAIRE |
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