title: Ice-templated synthesis of multifunctional three dimensional graphene/noble metal nanocomposites and their mechanical, electrical, catalytic, and electromagnetic shielding properties.
abstract: In-situ homogeneous dispersion of noble metals in three-dimensional graphene sheets is a key tactic for producing macroscopic architecture, which is desirable for practical applications, such as electromagnetic interference shielding and catalyst. We report a one-step greener approach for developing porous architecture of 3D-graphene/noble metal (Pt and Ag) nanocomposite monoliths. The resulting graphene/noble metal nanocomposites exhibit a combination of ultralow density, excellent elasticity, and good electrical conductivity. Moreover, in order to illuminate the advantages of the 3D-graphene/noble metal nanocomposites, their electromagnetic interference (EMI) shielding and electrocatalytic performance are further investigated. The as-synthesized 3D-graphene/noble metal nanocomposites exhibit excellent EMI shielding effectiveness when compared to bare graphene; the effectiveness has an average of 28 dB in the 8.2-12.4 GHz X-band range. In the electro-oxidation of methanol, the 3D-graphene/Pt nanocomposite also exhibits significantly enhanced electrocatalytic performance and stability than compared to reduced graphene oxide/Pt and commercial Pt/C.
authors.affiliation: IITB-Monash Research Academy, Indian Institute of Technology Bombay, Mumbai-400076, India.
authors.forename: P K
authors.initials: PK
authors.lastname: Sahoo
authors.affiliation: Department of Materials Engineering, Defence Institute of Advanced Technology, Pune - 411025, India.
authors.forename: Radhamanohar
authors.initials: R
authors.lastname: Aepuru
authors.affiliation: Department of Materials Engineering, Defence Institute of Advanced Technology, Pune - 411025, India.
authors.forename: Himanshu Sekhar
authors.initials: HS
authors.lastname: Panda
authors.affiliation: IITB-Monash Research Academy, Indian Institute of Technology Bombay, Mumbai-400076, India.
authors.forename: D
authors.initials: D
authors.lastname: Bahadur