Article

Journal of Chemical Sciences

, Volume 120, Issue 6, pp 573-578

Two approaches for enhancing the hydrogenation properties of palladium: Metal nanoparticle and thin film over layers

  • Manika KhanujaAffiliated withThin Film Laboratory, Department of Physics, Indian Institute of Technology Delhi
  • , B. R. MehtaAffiliated withThin Film Laboratory, Department of Physics, Indian Institute of Technology Delhi Email author 
  • , S. M. ShivaprasadAffiliated withChemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR)

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Abstract

In the present study, two approaches have been used for enhancing the hydrogenation properties of Pd. In the first approach, metal thin film (Cu, Ag) has been deposited over Pd and hydrogenation properties of bimetal layer Cu (thin film)/Pd(thin film) and Ag(thin film)/Pd(thin film) have been studied. In the second approach, Ag metal nanoparticles have been deposited over Pd and hydrogenation properties of Ag (nanoparticle)/Pd (thin film) have been studied and compared with Ag(thin film)/Pd(thin film) bimetal layer system. The observed hydrogen sensing response is stable and reversible over a number of hydrogen loading and deloading cycles in both bimetallic systems. Alloying between Ag and Pd is suppressed in case of Ag(nanoparticle)/Pd(thin film) bimetallic layer on annealing as compared to Ag (thin film)/Pd(thin film).

Keywords

Cu/Pd bimetal layers Ag/Pd bimetal layers nanoparticles hydrogen sensing XPS GAXRD