Pregled bibliografske jedinice broj: 279526
Nano-crystalline nickel as catalysts for hydrogen evolution
Nano-crystalline nickel as catalysts for hydrogen evolution // 210th Meeting of The Electrochemical Society : Book of Abstracts
Cancún, Meksiko, 2006. str. 122-122 (poster, međunarodna recenzija, sažetak, znanstveni)
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Naslov
Nano-crystalline nickel as catalysts for hydrogen evolution
Autori
Grubač, Zoran ; Metikoš-Huković, Mirjana ; Babić, Ranko
Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni
Izvornik
210th Meeting of The Electrochemical Society : Book of Abstracts
/ - , 2006, 122-122
Skup
Meeting of The Electrochemical Society (210 ; 2006)
Mjesto i datum
Cancún, Meksiko, 29.10.2006. - 03.11.2006
Vrsta sudjelovanja
Poster
Vrsta recenzije
Međunarodna recenzija
Ključne riječi
nanocrystalline nickel; hydrogen evolution reaction; electrocatalyst; linear polarization; electrochemical impedance spectroscopy measurements
Sažetak
The production of hydrogen, one of the most promising candidates for ‘ the fuel of the future’ by the electrolysis of water represents an ecologically clean and sustainable technology whose essential problem is an efficient, durable and economical electrocatalyst. Due to their mechanical and chemical stability and high electrocatalytic activity, nickel and nickel-based electrodes are among the most often used electrode materials for the alkaline water electrolysis [1, 2]. Therefore, in this work catalytic properties of sputter deposited nanocrystalline nickel (nc-Ni) for the hydrogen evolution reaction were investigated in an alkaline electrolyte solution by linear polarization and electrochemical impedance spectroscopy measurements. Nc-nickel thin films were deposited by a dc magnetron sputtering onto alumina ceramic substrates of various temperatures ranging from room temperature (RT) to 300oC. The working gas was argon in a continuous flow. The deposition time was 45 min. It has been found that the electrocatalytic activity of nc-Ni films for the HER depends on the experimental deposition conditions ; it increases with increasing argon pressure (up to 7.5 mTorr), and decreases with increasing substrate temperature. The improved catalytic activity of nc-Ni in comparison with polycrystalline Ni is in accordance with an increase in the intercrystalline volume fraction at the very small grain size of the sputter deposited nickel.
Izvorni jezik
Engleski
Znanstvena područja
Kemija
