Nano-crystalline nickel as catalysts for hydrogen evolution (CROSBI ID 524202)
Prilog sa skupa u zborniku | sažetak izlaganja sa skupa | međunarodna recenzija
Podaci o odgovornosti
Grubač, Zoran ; Metikoš-Huković, Mirjana ; Babić, Ranko
engleski
Nano-crystalline nickel as catalysts for hydrogen evolution
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.
nanocrystalline nickel; hydrogen evolution reaction; electrocatalyst; linear polarization; electrochemical impedance spectroscopy measurements
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Podaci o prilogu
122-122.
2006.
objavljeno
Podaci o matičnoj publikaciji
210th Meeting of The Electrochemical Society : Book of Abstracts
Podaci o skupu
Meeting of The Electrochemical Society (210 ; 2006)
poster
29.10.2006-03.11.2006
Cancún, Meksiko