Operando Spectroscopic Analysis of CoP Films Electrocatalyzing the Hydrogen-Evolution Reaction
| العنوان: | Operando Spectroscopic Analysis of CoP Films Electrocatalyzing the Hydrogen-Evolution Reaction |
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| المؤلفون: | Azhar I. Carim, Jack H. Baricuatro, Junko Yano, Walter S. Drisdell, Sheraz Gul, Manuel P. Soriaga, Nathan S. Lewis, Fadl H. Saadi |
| المصدر: | Journal of the American Chemical Society. 139:12927-12930 |
| بيانات النشر: | American Chemical Society (ACS), 2017. |
| سنة النشر: | 2017 |
| مصطلحات موضوعية: | Absorption spectroscopy, Inorganic chemistry, Analytical chemistry, 02 engineering and technology, Overpotential, 010402 general chemistry, Electrochemistry, Electrocatalyst, 01 natural sciences, Biochemistry, Catalysis, symbols.namesake, Colloid and Surface Chemistry, Transition metal, X-ray absorption spectroscopy, Chemistry, Phosphorus, Cobalt, Electrochemical Techniques, General Chemistry, 021001 nanoscience & nanotechnology, 0104 chemical sciences, X-Ray Absorption Spectroscopy, symbols, 0210 nano-technology, Raman spectroscopy, Hydrogen |
| الوصف: | Transition metal phosphides exhibit high catalytic activity toward the electrochemical hydrogen-evolution reaction (HER) and resist chemical corrosion in acidic solutions. For example, an electrodeposited CoP catalyst exhibited an overpotential, η, of -η < 100 mV at a current density of -10 mA cm-2 in 0.500 M H2SO4(aq). To obtain a chemical description of the material as-prepared and also while effecting the HER in acidic media, such electrocatalyst films were investigated using Raman spectroscopy and X-ray absorption spectroscopy both ex situ as well as under in situ and operando conditions in 0.500 M H2SO4(aq). Ex situ analysis using the tandem spectroscopies indicated the presence of multiple ordered and disordered phases that contained both near-zerovalent and oxidized Co species, in addition to reduced and oxygenated P species. Operando analysis indicated that the active electrocatalyst was primarily amorphous and predominantly consisted of near-zerovalent Co as well as reduced P. |
| تدمد: | 1520-5126 0002-7863 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9bf286d0f966f5f1fb41e88603c27ab9 https://doi.org/10.1021/jacs.7b07606 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....9bf286d0f966f5f1fb41e88603c27ab9 |
| قاعدة البيانات: | OpenAIRE |
Find this issue from the American Chemical Society | تدمد: | 15205126 00027863 |
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