%0 Journal Article
%T Preparation and Hydrogen Absorption/Desorption of Nanoporous Palladium Thin Films
%A Wen-Chung Li
%A Thomas John Balk
%J Materials
%D 2009
%I MDPI AG
%R 10.3390/ma2042496
%X 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.
%K dealloying
%K nanoporous
%K palladium
%K hydridation
%U http://www.mdpi.com/1996-1944/2/4/2496