title: Synthesis and characteristics of graphene oxide-derived carbon nanosheet-Pd nanosized particle composites.
abstract: Carbon nanosheet (CNS)-Pd nanosized particle (NP) composites were synthesized by using graphite oxide (GO) and bis(ethylenediamine)palladium(II) (Pd(en)(2)(2+)) as the precursors, and their structure and adsorption properties were examined. It was found that the Pd(en)(2)(2+) complex ions can be intercalated into GO layers highly efficiently to form a layered structure containing a large amount of Pd (approximately 12 wt %). By the subsequent chemical reduction, Pd NPs (2-6 nm in size) are well dispersed between CNS to form a CNS-Pd NP composite and serve as spacers to increase the porosity of the composite. Hydrogen adsorption results demonstrate that both Pd NPs and CNS play important roles in hydrogen adsorption, particularly at a lower temperature and for CNS with deficient sites, which bring about a H(2) adsorption greater than those on other Pd-loaded nanocarbon materials reported so far. The unique composite nanostructure having large contents of Pd NPs (20-25 wt %) stabilized by CNSs is hopeful to be applied to the fields of H(2)-related catalysis, sensing, and so forth.
authors.affiliation: Energy Technology Research Institute, National Institute of Advanced Industrial Science and Technology 16-1 Onogawa, Tsukuba, Ibaraki 305-5869, Japan.
authors.forename: Zhong-Liang
authors.initials: ZL
authors.lastname: Hu
authors.forename: Mami
authors.initials: M
authors.lastname: Aizawa
authors.forename: Zheng-Ming
authors.initials: ZM
authors.lastname: Wang
authors.forename: Noriko
authors.initials: N
authors.lastname: Yoshizawa
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Hatori