Platinum-like oxidation of nickel surfaces by rapidly switching voltage to generate highly active bifunctional catalysts
| Autor: | Rolf Wüthrich, Andrew R.T. Morrison, Seyed Schwan Hosseiny |
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| Rok vydání: | 2016 |
| Předmět: |
Tafel equation
Chemistry Inorganic chemistry chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrocatalyst 01 natural sciences 0104 chemical sciences Catalysis lcsh:Chemistry chemistry.chemical_compound Nickel lcsh:Industrial electrochemistry lcsh:QD1-999 Oxidizing agent Electrochemistry Water splitting 0210 nano-technology Bifunctional Platinum lcsh:TP250-261 |
| Zdroj: | Electrochemistry Communications, Vol 67, Iss, Pp 22-25 (2016) |
| ISSN: | 1388-2481 |
| DOI: | 10.1016/j.elecom.2016.02.020 |
| Popis: | Recently the importance of catalyzing the water splitting step of the hydrogen evolution reaction (HER) was highlighted. We demonstrate here a treatment to modify a nickel surface into a highly effective bifunctional HER catalyst (i0 = 0.18 A/m2, Tafel Slope = 106 mV/dec) that has a good distribution of both water splitting sites and Hads combination sites. The resulting surface is characterized electrochemically, and with SEM, EDX, XPS and AFM. The data is found to be consistent with the treatment oxidizing the Ni surface in a novel way creating the hypothesized “Ni(OH)x” structure (x between 0 and 2). Keywords: Electrocatalysis, Hydrogen, Surface engineering |
| Databáze: | OpenAIRE |
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