Effect of bath composition on properties of electroless deposited Co-P/Ni foam catalyst for hydrolysis of sodium borohydride solution

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The effect of bath composition on the properties of electroless deposited Co-P/Ni foam catalyst for hydrolysis of sodium borohydride solution was investigated by varying the bath composition. The NaH2PO2/CoCl2 and NH2CH2COOH/CoCl2 concentration ratio had a strong effect on the catalyst properties. The effect of NH2CH2COOH/CoCl2 was larger than that of NaH2PO2/CoCl2 for the concentration ratio range with practical deposition rates. The optimum concentration ratio of the coating bath was CoCl2:NH2CH2COOH:NaH2PO2 = 1:4:10. As the concentration of each component increased at the optimum concentration ratio, the coating bath decomposed on its own. As the amount of solute dissolved in the coating bath increased, the coating bath became unstable. The optimum composition of the stable coating bath to realize Co-P/Ni foam catalyst with good catalytic activity was 0.1 m (molality, mol/kg) CoCl2, 0.4 m NH2CH2COOH, and 1.0 m NaH2PO2. The weight percent of the deposited catalyst and hydrogen generation rate per deposited catalyst of 1 g at optimum composition were 8.39 wt% and 0.93 L/min.g (deposited catalyst), respectively. The bath composition was found to have a great effect on the Co-P/Ni foam catalyst properties and coating bath stability. Copyright (C) 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Issue Date
2012-11
Language
English
Article Type
Article
Keywords

HYDROGEN GENERATION PROPERTIES; COBALT-PHOSPHORUS CATALYSTS; NABH4 SOLUTION; HIGH-PERFORMANCE; B CATALYST; EFFICIENT CATALYST; RU CATALYST; THIN-FILMS; P FILMS; KINETICS

Citation

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.37, no.22, pp.17027 - 17039

ISSN
0360-3199
DOI
10.1016/j.ijhydene.2012.08.083
URI
http://hdl.handle.net/10203/102370
Appears in Collection
AE-Journal Papers(저널논문)
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