2024-03-28T14:20:47Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/191732021-12-15T12:54:39Zcom_10261_31com_10261_3com_10261_35com_10261_5col_10261_284col_10261_288
00925njm 22002777a 4500
dc
Ansón Casaos, Alejandro
author
Lafuente, Esperanza
author
Urriolabeitia, Esteban P.
author
Navarro-Martín, Rafael
author
Benito, Ana M.
author
Maser, Wolfgang K.
author
Martínez Fernández de Landa, María Teresa
author
2007-06
Single wall carbon nanotubes (SWNTs) and MAXSORB activated carbon have been used as the support of palladium nanoparticles. The preparation of the palladium loaded carbon materials has been done by direct reaction between the support and a Pd (0) compound, either Pd2(dba)3·CHCl3 or Pd(PPh3)4. The efficiency of the loading reaction has been much better when Pd2(dba)3·CHCl3 has been chosen as the Pd source, reaching high palladium loadings (up to ca. 45 wt.%) with relatively small particle size (5–10 nm for SWNTs and 30–40 nm for MAXSORB). The hydrogen isotherms of the palladium loaded materials present a steep increase at very low pressures. The H/Pd atomic ratio of the samples has been found to be dependent on the Pd precursor, being higher in the case of Pd2(dba)3·CHCl3. Several samples have achieved H/Pd ratios higher than the value for bulk Pd (H/Pd ≈ 0.6–0.7). Maximum hydrogen sorption at room temperature in the palladium loaded samples has been found to be of 0.5 wt.% at atmospheric pressure. Oxidative treatments on the substrate before the palladium loading have diminished the efficiency of the loading reaction, the hydrogen adsorption, and the H/Pd atomic ratio.
Journal of Alloys and Compounds 436(1-2): 294-297 (2007)
http://hdl.handle.net/10261/19173
10.1016/j.jallcom.2006.07.026
http://dx.doi.org/10.13039/501100003339
Surfaces and interfaces
Hydrogen storage materials
Gas–solid reactions
Preparation of palladium loaded carbon nanotubes and activated carbons for hydrogen sorption