%0 journal article %@ 0021-8979 %A Steyskal, E.-M.,Besenhard, M.,Landgraf, S.,Zhong, Y.,Weissmueller, J.,Poelt, P.,Albu, M.,Wuerschum, R. %D 2012 %J Journal of Applied Physics %N 7 %P 073703 %R doi:10.1063/1.4755808 %T Sign-inversion of charging-induced variation of electrical resistance of nanoporous platinum %U https://doi.org/10.1063/1.4755808 7 %X The electrical resistance (R) of nanoporous platinum prepared by dealloying reversibly changes by 4% upon electrochemical surface charging in a regime where oxygen adsorption/desorption and surface oxidation/reduction occur. The variation of R with charging shows a sign inversion. Besides the usual behavior of increasing R with positive charging, a decrease of R occurs at higher potentials. Following recent studies of the sign inversion of the surface stress-charge response of porous nanophase Pt, the sign-inversion of the resistance with charging may be related to the electronic structure of the surface oxide. In addition, a charge-induced variation of the charge-carrier scattering rate at the metal–electrolyte interface is taken into account.