Interfacial Electronic Structure Modulation of NiTe Nanoarrays with NiS Nanodots Facilitates Electrocatalytic Oxygen Evolution
| Autor: | Zhuofeng Ke, Kang Liu, Ziqian Xue, Mengke Cai, Qinglin Liu, Xia Li, Min Liu, Xialin Liu, Guangqin Li |
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| Rok vydání: | 2019 |
| Předmět: |
Tafel equation
Materials science Mechanical Engineering Binding energy Oxygen evolution chemistry.chemical_element Nanotechnology 02 engineering and technology Electronic structure Overpotential 010402 general chemistry 021001 nanoscience & nanotechnology Electrocatalyst 01 natural sciences 0104 chemical sciences Nickel chemistry Mechanics of Materials General Materials Science Nanodot 0210 nano-technology |
| Zdroj: | Advanced Materials. 31:1900430 |
| ISSN: | 1521-4095 0935-9648 |
| Popis: | Interface engineering has been recognized as one of the most promising strategies for regulating the physical and chemical properties of materials. However, constructing well-defined nanointerfaces with efficient oxygen evolution reaction (OER) still remains a challenge. Herein, cross columnar NiTe nanoarrays supported on nickel foam are prepared. Subsequently, NiTe/NiS nanointerfaces are constructed by an ion-exchange process. Importantly, the electrocatalytic performance for the OER can be facilitated by coupling NiTe and NiS. As a result, NiTe/NiS shows excellent OER activity with an ultralow overpotential of only 257 mV at a current density of 100 mA cm-2 , and a Tafel slope of 49 mV dec-1 in 1.0 m KOH. The calculated and experimental results reveal that the strong electron interaction on nanointerfaces induces electronic structure modulation, which optimizes the binding energy of *OOH intermediates, thus improving the OER performance. |
| Databáze: | OpenAIRE |
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