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Palladium Nanoparticles Supported on Vertically Oriented Reduced Graphene Oxide for Methanol Electro‐Oxidation
Author(s) -
Yang Liming,
Tang Yanhong,
Luo Shenglian,
Liu Chengbin,
Song Hejie,
Yan Dafeng
Publication year - 2014
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201402352
Subject(s) - graphene , oxide , catalysis , materials science , palladium , methanol , electrolysis , chemical engineering , nanoparticle , stacking , inorganic chemistry , nanotechnology , electrode , chemistry , metallurgy , electrolyte , organic chemistry , engineering
Abstract Reduced graphene oxide (rGO) is a promising support material for nanosized electrocatalysts. However, the conventional stacking arrangement of rGO sheets confines the electrocatalysts between rGO layers, which decreases the number of catalytic sites substantially. We report here a facile synthesis of vertically oriented reduced graphene oxide (VrGO) through cyclic voltammetric electrolysis of graphene oxide (GO) in the presence of Na 2 PdCl 4 . Experiments without Pd nanoparticles or with a low loading amount of Pd nanoparticles results in the deposition of rGO parallel to the electrodes. The vertical orientation of Pd/rGO nanoflakes causes a remarkable enhancement of the catalytic activity toward methanol electro‐oxidation. The mass activity (620.1 A g Pd −1 ) of Pd/VrGO is 1.9 and 6.2 times that of Pd/flat‐lying rGO (331.8 A g Pd −1 ) and commercial Pd/C (100.5 A g Pd −1 ), respectively. Furthermore, the Pd/VrGO catalyst shows excellent resistance to CO poisoning. This work provides a simple wet‐chemical method for VrGO preparation.