Palladium Nanoparticles and Bimetal Palladium Layers : for Enhanced Hydrogenation Properties

ISBN-13: 9783330063037 / Angielski / Miękka / 2017 / 176 str.

Manika Khanuja

Opis

In the present work, two approaches (i) nanoparticle route and (ii) bimetal layer route have been employed to enhance the Pd-H interaction. Size-selected, monodisperse Pd nanoparticles having well-defined size distributions have been synthesized. In Pd nanoparticles, a unique pulsed like hydrogen sensing response has been obtained in which electrical resistance increases due to electronic effect sharply followed by a sudden decrease due to geometric effect when the hydrogen is switched on. The hydrogen sensing response is studied at different H2 concentrations and measurement temperatures in size-selected and monodisperse Pd nanoparticles. Two types of sensing behaviours are observed as a function of H2 concentration: (i) a normally observed 'saturated' response and (ii) a 'pulsed' response. In the second approach of using bimetal layer, Cu and Ag thin film has been deposited onto Pd layers and hydrogenation properties have been studied. In Ag/Pd bimetal layer system, the effect of converting the metal over layer from thin film (TF) to metal nanoparticle (NP) layers has been investigated.

O autorze

Manika Khanuja graduated in Physics (H) from Miranda House, University of Delhi, M.Sc and Ph.D (Physics) from Indian Institute of Technology Delhi, India. She worked as a Guest-Scientist in University of Duisburg-Essen, Germany. She has published 2 books, 6 book chapters and more than 50 papers in SCI indexed international journals and conferences.