Nguyen Hoang Lam , Nguyen Tam Nguyen Truong , Kwang-Soon Ahn , Younjung Jo , Seung Beom Kang , Nguyen Huu Hieu , Shoyebmohamad F. Shaikh , Chang-Duk Kim , Moonyong Lee , Jae Hak Jung
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引用次数: 0
Abstract
In this research, we introduce a facile approach utilizing a glucose solution as a precursor to form a protective carbon layer on inherently unstable semiconductor nanostructures, addressing the pervasive issue of photo-corrosion. We focused on CuO photocathode, employing a straightforward technique to envelop them with an ultra-thin, amorphous carbon layer, rendering them suitable for photoelectrochemical (PEC) water-splitting application for hydrogen production. The results demonstrated exceptional photo-stability and significantly improved photocurrent density of CuO arrays equipped with the carbon protective layer. This transformative modification led to a substantial enhancement in PEC performance, yielding a photocurrent density up to 2.19 mA.cm−2 at 0 V vs. RHE. Furthermore, the maximum photo-to-current conversion efficiency reached 0.12 % at 0.1 V vs. RHE under AM 1.5G illumination condition (100 mW cm−2). In-depth investigations revealed that these enhancements results from accelerated electrochemical charge transfer at the electrode/electrolyte interface and concurrent mitigation of photo-corrosion rates. This approach has the potential to address stability concerns among a broad range of non-stable photoelectrodes, offering significant contributions to the field of energy conversion and the advancement of renewable energy technologies.
期刊介绍:
FlatChem - Chemistry of Flat Materials, a new voice in the community, publishes original and significant, cutting-edge research related to the chemistry of graphene and related 2D & layered materials. The overall aim of the journal is to combine the chemistry and applications of these materials, where the submission of communications, full papers, and concepts should contain chemistry in a materials context, which can be both experimental and/or theoretical. In addition to original research articles, FlatChem also offers reviews, minireviews, highlights and perspectives on the future of this research area with the scientific leaders in fields related to Flat Materials. Topics of interest include, but are not limited to, the following: -Design, synthesis, applications and investigation of graphene, graphene related materials and other 2D & layered materials (for example Silicene, Germanene, Phosphorene, MXenes, Boron nitride, Transition metal dichalcogenides) -Characterization of these materials using all forms of spectroscopy and microscopy techniques -Chemical modification or functionalization and dispersion of these materials, as well as interactions with other materials -Exploring the surface chemistry of these materials for applications in: Sensors or detectors in electrochemical/Lab on a Chip devices, Composite materials, Membranes, Environment technology, Catalysis for energy storage and conversion (for example fuel cells, supercapacitors, batteries, hydrogen storage), Biomedical technology (drug delivery, biosensing, bioimaging)