Two-Dimensional, Few-Layer Phosphochalcogenide, FePS3: A New Catalyst for Electrochemical Hydrogen Evolution over Wide pH Range
| Autor: | Debdyuti Mukherjee, Srinivasan Sampath, P. Muthu Austeria |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Tafel equation
Aqueous solution Renewable Energy Sustainability and the Environment Chemistry Inorganic chemistry Energy Engineering and Power Technology Exchange current density 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry Electrocatalyst 01 natural sciences 0104 chemical sciences Catalysis Metal Fuel Technology Chemistry (miscellaneous) visual_art Materials Chemistry visual_art.visual_art_medium Density functional theory 0210 nano-technology |
| Zdroj: | ACS Energy Letters. 1:367-372 |
| ISSN: | 2380-8195 |
| DOI: | 10.1021/acsenergylett.6b00184 |
| Popis: | A layered MPS3-type compound, FePS3, is introduced as an electrocatalyst for hydrogen evolution reaction (HER). The non-noble metal-based FePS3 is a semiconductor that could be solvent exfoliated into few-layer, two-dimensional (2D) nanosheets. The 2D thin sheets exhibit very good catalytic activity and stability toward HER over a wide pH range of acidic, alkaline, phosphate buffer, and 3.5 wt % aqueous NaCl solutions. The Tafel slope and exchange current density in acidic medium are determined to be ∼(45–50) mV dec–1 and 1 ± 0.2 × 10–3 A cm–2, respectively. The stability of the catalyst is found to be very good. Density functional theory calculations reveal P and S as favorable hydrogen adsorption sites. This material opens up a new class of ternary, layered semiconductors for various electrocatalytic studies and might also become important from a device physics point of view. |
| Databáze: | OpenAIRE |
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