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  • Novel strategy for preparation of graphene-Pd, Pt composite, and its enhanced electrocatalytic activity for alcohol oxidation.

Novel strategy for preparation of graphene-Pd, Pt composite, and its enhanced electrocatalytic activity for alcohol oxidation.

Langmuir : the ACS journal of surfaces and colloids (2012-12-25)
Lina Gao, Wenbo Yue, Shanshan Tao, Louzhen Fan
ABSTRACT

As advanced electrodes for direct alcohol fuel cells, graphene-Pd and graphene-Pt composites with a trace of SnO(2) have been successfully synthesized by a modified electroless plating technique. The surface of graphene oxide is first sensitized by Sn(2+) ions, and subsequently, Pd or Pt nanoparticles are deposited on the surface of graphene oxide. Finally, graphene oxide was reduced to graphene by further adding NaBH(4). Compared to other carbon-(e.g., Vulcan XC-72R) supported Pd and Pt, the resultant graphene-Pd and Pt composites exhibit better electrocatalytic activity and long-term stability toward alcohol electrooxidation. Additionally, a trace amount of SnO(2) formed around active catalysts may also be beneficial to the enhancement of electrochemical activity.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Tin(IV) oxide, nanopowder, ≤100 nm avg. part. size
Sigma-Aldrich
Tin(IV) oxide, ≥99.99% trace metals basis
Sigma-Aldrich
Tin(IV) oxide, −325 mesh, 99.9% trace metals basis