CuO microcrystals are electrodeposited on an epitaxial GaN layer on a Si(111) substrate to improve the solar water splitting efficiency of a GaN photoanode. The performance of the GaN/CuO composite junction photoanode is investigated as a function of the CuO deposition amount for CuO microcrystal formation. For optimum CuO deposition amount, the photocurrent density is significantly enhanced compared to that of the bare GaN photoanode. The improved water splitting performance is attributed to the built-in electric field and band offsets of the n-GaN/p-CuO heterostructure, promoting the separation of photogenerated electrons and holes and the transport of the hole to the surface.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/acs.langmuir.3c01944 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Effect of Monosaccharides Including Rare Sugars on the Bilayer Phase Behavior of Dimyristoylphosphatidylcholine.
Membranes (Basel)
December 2024
Department of Bioengineering, Division of Bioscience and Bioindustry, Graduate School of Technology, Industrial and Social Sciences, Tokushima University, 2-1 Minamijosanjima-cho, Tokushima 770-8513, Japan.
We observed bilayer phase transitions of dimyristoylphosphatidylcholine (DMPC) in aqueous solutions of four kinds of monosaccharides, namely, D-glucose, D-fructose, D-allose and D-psicose, using differential scanning calorimetry (DSC). D-allose (C3-epimer of D-glucose) and D-psicose (C3-epimer of D-fructose) are rare sugars. We performed DSC measurements using two types of sugar-containing sample dispersions of the DMPC vesicles: one is a normal sample dispersion with no concentration asymmetry between the inside and outside of the vesicles and the other is an unusual sample dispersion with a concentration asymmetry.
View Article and Find Full Text PDFMagnetic Field-Induced Control of Crystal Orientation in Porous CuNi Films for Enhanced Electrocatalytic Hydrogen Evolution.
ACS Appl Mater Interfaces
December 2024
Key Laboratory of Near-Net Forming of Light Metals of Liaoning Province, Dalian Jiaotong University, Dalian 116028, China.
Porous CuNi films are promising candidates for electrocatalytic water splitting, with their catalytic performance largely influenced by the crystallographic structure and chemical state. In this study, by employing a magnetic field-controlled bubble template-assisted electrodeposition method, CuNi films with a preferred Ni(111) crystal orientation were synthesized. Moreover, adjusting the magnetic field direction during deposition can affect the degree of preferred orientation and, consequently, the electrochemical activity of the films.
View Article and Find Full Text PDFVapor-Assisted In Situ Synthesis of the NbCTNS/NbOF MXene Heterostructure for Enhanced Solar-Driven Photoelectrochemical Performance.
J Phys Chem Lett
December 2024
Department of Chemistry, National Cheng Kung University, Tainan 701, Taiwan.
Photocatalytic water splitting holds great potential for transforming solar energy into valuable chemical products. However, obstacles such as the rapid recombination of electron-hole pairs and insufficiently active surface areas of photocatalysts remain significant challenges. In this study, we present the first demonstration that lithium bis(trifluoromethanesulfonyl)imide vapor successfully etches aluminum from NbAlC MAX phase powders while concurrently forming NbOF anchors on NbCT nanosheet (NbCTNS) MXene, leading to the in situ formation of a NbCTNS/NbOF heterostructure composite.
View Article and Find Full Text PDFThe Structure-Mechanics Relationship of Bamboo-Epidermis and Inspired Composite Design by Artificial Intelligence.
Adv Mater
December 2024
Laboratory for Multiscale Material Modelling, Syracuse University, 151L Link Hall, Syracuse, NY, 13244, USA.
Bamboo culm has been widely used in engineering for its high strength, lightweight, and low cost. Its outermost epidermis is a smooth and dense layer that contains cellulose, silica particles, and stomata and acts as a water and mechanical barrier. Recent experimental studies have shown that the layer has a higher mechanical strength than other inside regions.
View Article and Find Full Text PDFStabilizing Polyoxometalate for Enhanced OER Performance Using a Porous Manganese Oxide Support.
ChemSusChem
December 2024
Sungkyunkwan University, Department of Physics, 2066, Seobu-ro,, Jangan-gu,, 16419, Suwon, KOREA, REPUBLIC OF.
The oxygen evolution reaction (OER) is a critical challenge in electrocatalytic water splitting, hindered by high energy demands and slow kinetics. Polyoxometalates (POMs), recognized for their unique redox capabilities, structural archetypes, and molecular precision, are promising candidates for the oxygen evolution reaction (OER). Yet, their application is hindered by high water solubility, causing rapid degradation and efficiency loss under harsh OER conditions.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!