Hybrids of gold nanoparticles highly dispersed on graphene for the oxygen reduction reaction

• Au NPs/graphene hybrid was synthesized using Au-S bond.
• Sulphydryl-functionalized graphene oxide was synthesized by condensation reaction.
• AuNPs-rGO nanohybrids showed good electrocatalytic activity for ORR.

An approach to the synthesis of gold nanoparticles–graphene (AuNPs–GOSH) hybrids via the AuS bond between the sulfhydryl-functionalized graphene oxide (GOSH) and gold nanoparticles (AuNPs) has been proposed. In this approach, the sulfhydryl groups highly dispersed on the GOSH nanosheets are used to assemble gold nanoparticles, forming the AuNPs–GOSH hybrids. It is found that the AuNPs–rGO hybrids show high electrochemical activity toward the oxygen reduction reaction (ORR) and high stability in alkaline media.

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