3D flower-like polypyrrole-derived N-doped porous carbon coupled cobalt oxide as efficient oxygen evolution electrocatalyst
| Autor: | Suzhen Ren, Jialin Zhao, Weiwei Qiu, Qing Mao, Sumbal Farid, Dongxu Tian, Ce Hao, Lianlian Zhao |
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| Rok vydání: | 2020 |
| Předmět: |
Tafel equation
Materials science Renewable Energy Sustainability and the Environment Oxygen evolution Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology Overpotential 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Polypyrrole Electrocatalyst 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Fuel Technology chemistry Chemical engineering 0210 nano-technology Cobalt oxide Carbon Cobalt |
| Zdroj: | International Journal of Hydrogen Energy. 45:31926-31941 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2020.08.217 |
| Popis: | For electrochemical splitting of water, highly active and non-precious metal electrocatalysts towards the oxygen evolution reaction (OER) are direly needed to address the cost and stability issues. Herein, polypyrrole (PPy) with 3D flower-like structure has been prepared to obtain N-doped porous carbon sheets (N–C) and to implant with cobalt oxides (Co3O4) via simple and cost-effective hydrothermal reaction. Benefitting from the 3D flower-like porous carbon structure, Co3O4/N–C demonstrates enlarged surface area replenished with more electrocatalytic active sites. What's more, Co3O4 nanoparticles are evenly dispersed onto the N-doped carbon surface which effectively prevents their aggregation and detachment. These exclusive structural features render amazing catalytic activity for Co3O4/N–C towards OER with an onset potential of ~1.31 V (vs RHE), low overpotential of 120 mV at 10 mA cm−2 and a Tafel slope of only 33 mV dec−1 in basic media. This work presents a simple approach to meet an ideal catalytic material with better morphology and advantageous properties for the possible energy and environmental applications. |
| Databáze: | OpenAIRE |
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