Co-based coordination polymer-derived Co3S4 nanotube decorated with NiMoO4 nanosheets for effective oxygen evolution reaction
| Autor: | Gui Xu, Liang Chen, Guan Cheng Xu, Hui Ding, Li Zhang |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Tafel equation
Nanotube Materials science Renewable Energy Sustainability and the Environment Coordination polymer Nanowire Oxygen evolution Energy Engineering and Power Technology 02 engineering and technology Surface engineering Overpotential 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Catalysis chemistry.chemical_compound Fuel Technology Chemical engineering chemistry 0210 nano-technology |
| Zdroj: | International Journal of Hydrogen Energy. 45:30463-30472 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2020.08.056 |
| Popis: | The design and construction of novel electrocatalysts are necessary for oxygen evolution reaction (OER). In particular, interface/surface engineering is an effective way to modify active sites and facilitate electron transfer, thereby improving OER performance. Herein, Co-based coordination polymer-derived hollow Co3S4@NiMoO4 nanotube was synthesized via a facile two-step solvothermal/hydrothermal method. [Co(C4H7NO4)]·xH2O (Co-Asp, Asp = l -aspartic acid) nanowire as morphological template to prepare hollow Co4S3 nanotube through the anion exchange. Then, Co4S3 was transformed into Co3S4 and NiMoO4 nanosheets were deposited on the surface of the Co3S4 nanotube in hydrothermal reaction. The hollow Co3S4 nanotube effectively avoids the aggregation of NiMoO4 nanosheets during the synthesis process. In addition, hollow Co3S4@NiMoO4 nanotube has dramatically increased surface area and more exposed active catalytic sites. Compared to a single Co4S3 and NiMoO4, hollow Co3S4@NiMoO4 nanotube exhibits good electrocatalytic OER performance with Tafel slopes of 102 mV dec−1 and a current density of 10 mA cm−2 at overpotential of 320 mV in 1.0 M KOH. At higher current density, the OER performance of hollow Co3S4@NiMoO4 nanotube is as good as that of commercial RuO2. More importantly, this work provides a novel template for interface/surface engineering, which can applied in other fields. |
| Databáze: | OpenAIRE |
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