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Macroporous Monolithic Polymers: Preparation and Applications
Materials 2009, 2(4), 2496-2509; doi:10.3390/ma2042496

Preparation and Hydrogen Absorption/Desorption of Nanoporous Palladium Thin Films

Department of Chemical and Materials Engineering, University of Kentucky, 177 F. Paul Anderson Tower, Lexington, KY 40506-0046, USA
* Author to whom correspondence should be addressed.
Received: 29 October 2009 / Revised: 18 December 2009 / Accepted: 21 December 2009 / Published: 23 December 2009
(This article belongs to the Special Issue Porous Materials)
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Nanoporous Pd (np-Pd) was prepared by co-sputtering Pd-Ni alloy films onto Si substrates, followed by chemical dealloying with sulfuric acid. X-ray diffractometry and chemical analysis were used to track the extent of dealloying. The np-Pd structure was changed from particle-like to sponge-like by diluting the sulfuric acid etchant. Using suitable precursor alloy composition and dealloying conditions, np-Pd films were prepared with uniform and open sponge-like structures, with interconnected ligaments and no cracks, yielding a large amount of surface area for reactions with hydrogen. Np-Pd films exhibited shorter response time for hydrogen absorption/desorption than dense Pd films, showing promise for hydrogen sensing.
Keywords: dealloying; nanoporous; palladium; hydridation dealloying; nanoporous; palladium; hydridation
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Li, W.-C.; Balk, T.J. Preparation and Hydrogen Absorption/Desorption of Nanoporous Palladium Thin Films. Materials 2009, 2, 2496-2509.

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