Conţinutul numărului revistei |
Articolul precedent |
Articolul urmator |
774 1 |
Ultima descărcare din IBN: 2023-09-13 16:08 |
SM ISO690:2012 VERNICKAITE, E., BERSIROVA, Oksana, CESIULIS, Henrikas, TSYNTSARU, Natalia. Design of highly active electrodes for hydrogen evolution reaction based on mo-rich alloys electrodeposited from ammonium acetate bath. In: Coatings, 2019, vol. 9, p. 0. ISSN 2079-6412. DOI: https://doi.org/10.3390/COATINGS9020085 |
EXPORT metadate: Google Scholar Crossref CERIF DataCite Dublin Core |
Coatings | ||||||
Volumul 9 / 2019 / ISSN 2079-6412 | ||||||
|
||||||
DOI:https://doi.org/10.3390/COATINGS9020085 | ||||||
Pag. 0-0 | ||||||
|
||||||
Descarcă PDF | ||||||
Rezumat | ||||||
The given research was driven by prospects to design Mo-rich coatings with iron group metals electrodeposited from a highly saturated ammonium acetate bath. The obtained coatings could be employed as prominent electrodes for the hydrogen evolution reaction (HER). It was found that the Mo content in Ni-Mo alloys can be tuned from 30 to 78 at.% by decreasing the molar ratio [Ni(II)]:[Mo(VI)] in the electrolyte from 1.0 to 0.25 and increasing the cathodic current density from 30 to 100 mA/cm2. However, dense cracks and pits are formed due to hydrogen evolution at high current densities and that diminishes the catalytic activity of the coating for HER. Accordingly, smoother and crack-free Ni-54 at.% Mo, Co-52 at.% Mo and Fe-54 at.% Mo alloys have been prepared at 30 mA/cm2. Their catalytic behavior for HER has been investigated in a 30 wt.% NaOH solution at temperatures ranging from 25 to 65 °C. A significant improvement of electrocatalytic activity with increasing bath temperature was noticed. The results showed that the sequence of electrocatalytic activity in alkaline media decreases in the following order: Co-52 at.% Mo > Ni-54 at.% Mo > Fe-54 at.% Mo. These peculiarities might be linked with different catalytic behavior of formed intermetallics (and active sites) in electrodeposited alloys. The designed electrodeposited Mo-rich alloys have a higher catalytic activity than Mo and Pt cast metals. |
||||||
Cuvinte-cheie Co-Mo, Electrocatalysis, Electrodeposition, Fe-Mo alloys, Hydrogen evolution reaction, Ni-Mo |
||||||
|
Google Scholar Export
<meta name="citation_title" content="Design of highly active electrodes for hydrogen evolution reaction based on mo-rich alloys electrodeposited from ammonium acetate bath"> <meta name="citation_author" content="Vernickaite E."> <meta name="citation_author" content="Bersirova Oksana"> <meta name="citation_author" content="Cesiulis Henrikas"> <meta name="citation_author" content="Tsyntsaru Natalia"> <meta name="citation_publication_date" content="2019/02/11"> <meta name="citation_journal_title" content="Coatings"> <meta name="citation_pdf_url" content="https://ibn.idsi.md/sites/default/files/imag_file/coatings-09-00085-v2.pdf">