%0 journal article
%@ 0743-7463
%A Steyskal, E.-M., Qi, Z., Poelt, P., Albu, M., Weissmueller, J., Wuerschum, R.

%D 2016
%J Langmuir
%N 31
%P 7757-7764 
%R doi:10.1021/acs.langmuir.6b01734
%T Electrochemically Tunable Resistance of Nanoporous Platinum Produced by Dealloying
%U https://doi.org/10.1021/acs.langmuir.6b01734
31 
%X The extremely high surface-to-volume ratio of nanoporous platinum (np-Pt) produced by dealloying was applied for tuning electrical resistance by surface charging. In the as-dealloyed state, a characteristic sign-inversion of the charging-induced resistance variation occurs, which can be associated with the electronic structure of PtO. After electrochemical reduction, the relative resistance variations of np-Pt of up to 58% could be generated by electrochemically induced adsorption and desorption, which was 1 order of magnitude larger compared with that of cluster-assembled nanocrystalline Pt. Although the maximum resistance variation was also higher than that of dealloyed nanoporous gold (np-Au), the resistance variation related to the imposed charge was reduced owing to the higher bulk resistance of Pt compared with that of Au. The sign-inversion behavior of the resistance could be recovered by re-oxidation.