Activated carbons doped with Pd nanoparticles for

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Dec 27, 2011 - due to both gas cooling and hydrogen sorption were measured after thermodynamic .... samples a superficial Pd oxide layer can be formed [29]. At low temperature, Pd particles ..... Adsorption of gases in multimolecular layers.

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Activated carbons doped with Pd nanoparticles for hydrogen storage W. Zhao a, V. Fierro a,*, C. Zlotea b, M.T. Izquierdo c, C. Chevalier-Ce´sar b, M. Latroche b, A. Celzard a,1 a

Institut Jean Lamour, De´partement 2, Chimie et Physique des Solides et des Surfaces, UMR 7198, CNRS e Nancy-Universite´ e UPV-Metz, ENSTIB, 27 rue Philippe Se´guin, BP 1041, 88051 Epinal Cedex 9, France b Chimie Me´tallurgique des Terres Rares, Institut de Chimie et des Mate´riaux de Paris Est, UMR 7182, CNRS, 2-8 rue Henri Dunant, 94320 Thiais Cedex, France c Instituto de Carboquı´mica, ICB-CSIC, Miguel Luesma Casta´n, 4, 50018 Zaragoza, Spain

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abstract

Article history:

Three activated carbons (ACs) having apparent surface areas ranging from 2450 to

Received 9 September 2011

3200 m2/g were doped with Pd nanoparticles at different levels within the range

Received in revised form

1.3e10.0 wt.%. Excess hydrogen storage capacities were measured at 77 and 298 K at

30 November 2011

pressures up to 8 MPa. We show that hydrogen storage at 298 K depends on Pd content at

Accepted 11 December 2011

pressures up to 2e3 MPa, below which the stored amount is low (

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