title: Binderless, Free-Standing Porous Interconnects of Ni-Fe Alloy Decorated Reduced Graphene Oxide for Oxygen Evolution Reaction.
abstract: We report the synthesis of lightweight, free-standing Ni-Fe@rGO porous interconnects by carbothermal reduction of Ni-FeOx using graphene oxide (GO) as the reducing agent. Here, we take advantage of the oxygen functionalities present in GO to aid in anchoring the metal ions followed by epoxide-assisted Ni-FeOx@GO network formation. When pyrolyzed under inert conditions, Ni-FeOx@GO networks were converted to Ni-Fe@rGO by simple carbothermal metal reduction at 800 °C. The Ni-Fe@rGO monoliths were found to be macroporous, electrically conducting, and electrocatalytic toward oxygen evolution reaction (OER). The monoliths exhibited excellent OER activity yielding a current density of 10 mA cm-2at an overpotential of 350 mV versus RHE, Tafel slope of 38 mV decade-1, and a TOF value of 50 s-1on par with the established Ni-Fe based electrocatalysts.
authors.affiliation: CSIR-Central Electrochemical Research Institute , Karaikudi-630006, India.
authors.forename: Naveen
authors.identifier: 0000-0002-7565-1065
authors.initials: N
authors.lastname: Chandrasekaran
authors.affiliation: CSIR-Central Electrochemical Research Institute , Karaikudi-630006, India.
authors.forename: Saravanakumar
authors.initials: S
authors.lastname: Muthusamy