  We present an efficient electrocatalytic material based on anchored MoO3
nanoparticles on reduced graphene oxide (RGO) nanosheets. After preparation of
graphene oxide (GO), the MoO3 nanoparticles anchored on GO nanosheet by using
the arc-discharge method. X-ray diffraction patterns show that the MoO3
nanoparticles are well crystallized on RGO in the orthorhombic crystalline
phase with a crystallite size of 83 nm. In addition, FT-IR and Raman
spectroscopy results show that during the arc-discharge process, the GO
nanosheets have been reduced and RGO nanosheets are decorated with MoO3
nanoparticles which form a porous structure. The surface energy of the prepared
electrode was measured as 44.56 mJ/m2, which shows the desirable spreading
ability of the electrolyte on the electrode. Finally, electrochemical
performance was measured in the symmetrical dummy cell by impedance
spectroscopy and cyclic voltammogram, and the photochemical test was measured
in the dye-sensitized solar cell by current density measurement. Our results
show that the electrochemical performance of the RGM electrode is better than
the RGO electrode and is comparable with the Platinum electrode and also the
efficiency of RGM electrode used in a dye-sensitized solar cell as a counter
electrode is 5.55% near to Platinum electrode performance.
