1D/1D Hierarchical Nickel Sulfide/Phosphide Nanostructures for Electrocatalytic Water Oxidation
| Autor: | Hua Gui Yang, Huai Qin Fu, Peng Fei Liu, Chong Wu Wang, Le Zhang, Lirong Zheng |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Nickel sulfide Renewable Energy Sustainability and the Environment Phosphide Oxygen evolution Energy Engineering and Power Technology 02 engineering and technology Overpotential 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Catalysis chemistry.chemical_compound Fuel Technology Chemical engineering chemistry Chemistry (miscellaneous) Materials Chemistry Water splitting Nanorod 0210 nano-technology Electrochemical reduction of carbon dioxide |
| Zdroj: | ACS Energy Letters. 3:2021-2029 |
| ISSN: | 2380-8195 |
| DOI: | 10.1021/acsenergylett.8b00982 |
| Popis: | The sluggish kinetics of the oxygen evolution reaction (OER) limits the efficiencies of solar-powered electrical-conversion applications, such as water splitting and carbon dioxide reduction. Herein, we rationally designed a metallic nanostructured nickel sulfide/phosphide hybrid (NiSxPy) as an efficient precatalyst for OER, with one-dimensional (1D) nanowires grown on 1D nanorods. The resulting metallic hybrid NiSxPy catalyst can accelerate the electron transfer process and expose abundant in situ-generated NiOOH species during OER (NiSxPy–O). Therefore, NiSxPy–O exhibits a low overpotential of 192 mV (with 100% iR compensation; this value should be 200 mV without compensation) to achieve an O2 partial current density (jO2) of 10 mA cm–2 and a robust stability over 135 h without obvious degradation. Moreover, a jO2 of 10 mA cm–2 at an overpotential of 315 mV (with 100% iR compensation; this value should be 365 mV without compensation) is attained in near-neutral conditions. These results may pave a new w... |
| Databáze: | OpenAIRE |
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