Electrodeposited Ni-Sn coatings as electrocatalysts for hydrogen and oxygen evolution in alkaline solutions
The hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) were studied at electrodeposited Ni-Sn alloys. All coatings were electrodeposited onto a Ni 40 mesh substrate from a bath containing Ni and Sn ions in the presence of pyrophosphate and glycine. The electrodes were investig...
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Engineering Society for Corrosion, Belgrade
2016-03-01
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| Series: | Zaštita Materijala |
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| Online Access: | https://www.zastita-materijala.org/index.php/home/article/view/730 |
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| author | U.Č. Lačnjevac Krstajić Lj. Gajić N.V. Krstajić |
| author_facet | U.Č. Lačnjevac Krstajić Lj. Gajić N.V. Krstajić |
| author_sort | U.Č. Lačnjevac |
| collection | DOAJ |
| description | The hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) were studied at electrodeposited Ni-Sn alloys. All coatings were electrodeposited onto a Ni 40 mesh substrate from a bath containing Ni and Sn ions in the presence of pyrophosphate and glycine. The electrodes were investigated by cyclic voltammetry (CV), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), electrochemical impedance spectroscopy (EIS) and polarization measurements. It was shown that among the increase of the roughness factor of Ni- Sn coatings with the increase of electrodeposition current density, their composition was also responsible for their catalytic activity for both, the HER and the OER. In the potential range of the HER two regions were observed, but none of them was characterized with the linear dependence E vs. log j (Tafel slope). For the OER two Tafel slopes were detected: one of about 60 mV dec-1 at lower current densities (up to about 20 mA cm-2) and one of about 120 mV dec-1 at higher current densities. Based on the Tafel slopes and EIS results the mechanisms for the HER and OER were proposed and discussed. |
| format | Article |
| id | doaj-art-3f423d4318f742cdaae6beb02eaf5f0e |
| institution | OA Journals |
| issn | 0351-9465 2466-2585 |
| language | English |
| publishDate | 2016-03-01 |
| publisher | Engineering Society for Corrosion, Belgrade |
| record_format | Article |
| series | Zaštita Materijala |
| spelling | doaj-art-3f423d4318f742cdaae6beb02eaf5f0e2025-08-20T02:08:07ZengEngineering Society for Corrosion, BelgradeZaštita Materijala0351-94652466-25852016-03-0157113614710.5937/ZasMat1601136J729Electrodeposited Ni-Sn coatings as electrocatalysts for hydrogen and oxygen evolution in alkaline solutionsU.Č. Lačnjevac0Krstajić Lj. Gajić1N.V. Krstajić2University of Belgrade, Institute for Multidisciplinary Research, SerbiaSerbian Academy of Sciences and Arts - SASA, Institute of Technical Sciences , Belgrade, SerbiaUniversity of Belgrade, Faculty of Technology and Metallurgy, SerbiaThe hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) were studied at electrodeposited Ni-Sn alloys. All coatings were electrodeposited onto a Ni 40 mesh substrate from a bath containing Ni and Sn ions in the presence of pyrophosphate and glycine. The electrodes were investigated by cyclic voltammetry (CV), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), electrochemical impedance spectroscopy (EIS) and polarization measurements. It was shown that among the increase of the roughness factor of Ni- Sn coatings with the increase of electrodeposition current density, their composition was also responsible for their catalytic activity for both, the HER and the OER. In the potential range of the HER two regions were observed, but none of them was characterized with the linear dependence E vs. log j (Tafel slope). For the OER two Tafel slopes were detected: one of about 60 mV dec-1 at lower current densities (up to about 20 mA cm-2) and one of about 120 mV dec-1 at higher current densities. Based on the Tafel slopes and EIS results the mechanisms for the HER and OER were proposed and discussed.https://www.zastita-materijala.org/index.php/home/article/view/730h2 evolutiono2 evolutionalkaline solutionelectrodeposited ni-sn alloys |
| spellingShingle | U.Č. Lačnjevac Krstajić Lj. Gajić N.V. Krstajić Electrodeposited Ni-Sn coatings as electrocatalysts for hydrogen and oxygen evolution in alkaline solutions Zaštita Materijala h2 evolution o2 evolution alkaline solution electrodeposited ni-sn alloys |
| title | Electrodeposited Ni-Sn coatings as electrocatalysts for hydrogen and oxygen evolution in alkaline solutions |
| title_full | Electrodeposited Ni-Sn coatings as electrocatalysts for hydrogen and oxygen evolution in alkaline solutions |
| title_fullStr | Electrodeposited Ni-Sn coatings as electrocatalysts for hydrogen and oxygen evolution in alkaline solutions |
| title_full_unstemmed | Electrodeposited Ni-Sn coatings as electrocatalysts for hydrogen and oxygen evolution in alkaline solutions |
| title_short | Electrodeposited Ni-Sn coatings as electrocatalysts for hydrogen and oxygen evolution in alkaline solutions |
| title_sort | electrodeposited ni sn coatings as electrocatalysts for hydrogen and oxygen evolution in alkaline solutions |
| topic | h2 evolution o2 evolution alkaline solution electrodeposited ni-sn alloys |
| url | https://www.zastita-materijala.org/index.php/home/article/view/730 |
| work_keys_str_mv | AT uclacnjevac electrodepositednisncoatingsaselectrocatalystsforhydrogenandoxygenevolutioninalkalinesolutions AT krstajicljgajic electrodepositednisncoatingsaselectrocatalystsforhydrogenandoxygenevolutioninalkalinesolutions AT nvkrstajic electrodepositednisncoatingsaselectrocatalystsforhydrogenandoxygenevolutioninalkalinesolutions |