In-situ Deposition of Graphene Oxide Catalyst for Efficient Photoelectrochemical Hydrogen Evolution Reaction Using Atmospheric Plasma

Abstract

The vacuum deposition method requires high energy and temperature. Hydrophobic reduced graphene oxide (rGO) can be obtained by plasma-enhanced chemical vapor deposition under atmospheric pressure, which shows the hydrophobic surface property. Further, to compare the effect of hydrophobic and the hydrophilic nature of catalysts in the photoelectrochemical cell (PEC), the prepared rGO was additionally treated with plasma that attaches oxygen functional groups effectively to obtain hydrophilic graphene oxide (GO). The hydrogen evolution reaction (HER) electrocatalytic activity of the hydrophobic rGO and hydrophilic GO deposited on the p-type Si wafer was analyzed. Herein, we have proposed a facile way to directly deposit the surface property engineered GO.

Physicochemical properties and performance of graphene oxide/polyacrylonitrile composite fibers as supercapacitor electrode materials

“…8c) has two peaks derived from the primary pyridinic N (N-6) functional group observed at 398.5 eV along with the pyrrolic/pyridone N (N-5) and quaternary N (N-Q) peaks at 400.1 eV. 53,55,56 Moreover, the O1s spectrum (CNF3-Fig. 8d) has two peaks concentrated in the binding energy 531.8 eV associated with the carbonyl functional group (C]O) and 533.8 eV associated with the hydroxyl functional group (C-O/-OH).…”

Thermal Treatment of Polyvinyl Alcohol for Coupling MoS2 and TiO2 Nanotube Arrays toward Enhancing Photoelectrochemical Water Splitting Performance

“…Photoelectrochemical (PEC) water splitting based on semiconductor photoanodes has rapidly developed as an alternative energy production approach due to its simple fabrication process and environmental friendliness [1][2][3][4]. Fujishima and Honda first discovered the water-splitting in 1972 over TiO 2 nanomaterials for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER).…”

The Influence of Deposition Time on the Structural, Morphological, Optical and Electrical Properties of ZnO-rGO Nanocomposite Thin Films Grown in a Single Step by USP

“…Although the ultrasonic spray pyrolysis (USP) allows the simultaneous oxidation and reduction of graphene in a single method, it has been scarcely reported. Furthermore, the use of inert atmospheres or other sophisticated techniques is not required for it [21,22]. In addition, USP competes with other commonly used techniques due its low cost and the good physical properties of the obtained product [23], aside that is a process well suited for large-scale production, which is desirable for industrial applications [24].…”