The tunable plasma synthesis of Pt-reduced graphene oxide nanocomposites

Abstract

Herein, we have developed Pt-plasma reduced graphene oxide (Pt/P-rGO) catalysts displaying high overpotentials for methanol oxidation reaction (MOR) through facile and tunable plasma treatments. We provide insight into the improved performance of these catalysts by combining electrochemical measurements with microscopic and spectroscopic characterization techniques. The analysis results showed that the Pt nanoparticles (NPs) were successfully deposited on P-rGO. The deposition and uniformity of Pt NPs were influenced by tuning the discharge power of the plasma. The catalytic performance towards the methanol oxidation reaction is investigated. The Pt/P-rGO NPs composites under 100 W show the best electrocatalytic activity. These results were vital to the further application of graphene-based metal nanocomposites synthesized by plasma technology.

Tuning of cationic distribution in “partially inversed” cobalt ferrite spinel nanocubes via a nitrogen-doped graphene oxide support for enhanced bifunctional oxygen electrocatalysis

“…6(d)) were used to estimate the kinetic parameters including kinetic current density (j k ) according to eqn (4). Here, the measured current density at an applied potential (j) is related to the diffusion limited current density (j d ), estimated by using the Levich equation eqn (5).…”

“…The methanol tolerance of M-N-C catalysts is a clear advantage for DMFCs. 3,5,6 First row transition metals are being widely explored as viable and cost-effective alternatives because of their intrinsically promising electrocatalytic activities, low cost, high abundance, and easy availability. 7 Particularly, transition metal-based spinel oxides, AB 2 O 4 (where A and B are metals), exhibit interesting electrocatalytic activities towards both the ORR and the OER.…”

Plasma Assisted Reduction of Graphene Oxide Films

“…The primary objective here is to elucidate the reduction of GO-films with various plasma and to highlight the potential of plasma technologies in this topic. GO in the form of monolayers, thin-films, and paper (a few μm-thick interlocked layered-structure consisting of micrometer-sized graphene crystals [ 56 , 57 ]) is covered here apart from GO-composites [ 58 ] and powders [ 59 , 60 ]. The fundamentals, principles, configurations, and applications of plasma are not covered, as they are available in literatures [ 61 , 62 , 63 , 64 , 65 , 66 , 67 ].…”