Ag-doped Ag2S@MoS2 catalyst for alkaline hydrogen evolution reaction
| Autor: | Liqiong Wang, Shenggang Zhou, Cong Zhang, Chang Tian, Meiling Tian, Penghui Luo, Yong Cao, Yuanqi You, Yang Xu |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Inorganic chemistry Doping chemistry.chemical_element Conductivity Overpotential Condensed Matter Physics Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Catalysis Nickel chemistry Specific surface area Electrode Hydrothermal synthesis Electrical and Electronic Engineering |
| Zdroj: | Journal of Materials Science: Materials in Electronics. 32:21297-21307 |
| ISSN: | 1573-482X 0957-4522 |
| DOI: | 10.1007/s10854-021-06632-9 |
| Popis: | In this paper, a hydrothermal synthesis method synthesized a foamed nickel (NF)-supported Ag-doped Ag2S@MoS2 hydrogen evolution catalyst. Silver doping can improve the conductivity of MoS2, thereby improving the hydrogen evolution activity of MoS2. Compared with a single MoS2, the Ag2S@MoS2 electrode has a larger specific surface area and has many highly catalytic S edges. In 1 M KOH, the overpotential of Ag2S@Ag0.33MoS2/NF electrode at 10 mA cm−2 is approximately 188 mV. Comparing with the overpotential of NF (391 mV) and MoS2/NF (290 mV), it is much lower. Further changing the amount of silver added, the overpotential of Ag2S@Ag0.5MoS 2/NF is further reduced to 165 mV at a current density of 10 mA cm−2. When the voltage is 0.35 V, the current densities of Ag2S@Ag0.33MoS2/NF (42.45 mA cm−2) and Ag2S@Ag0.5MoS2/NF (55.5 mA cm−2) are higher than those of NF (4.91 mA cm−2) and MoS2/NF (20.51 mA cm−2). |
| Databáze: | OpenAIRE |
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