The Co/CoO/CoCH (P-CoCH) nanowire core/shell arrays were prepared by a one step hydrothermal method and rapid reduction of cobalt carbonate hydroxide (CoCH) in Ar/H plasma for the first time. The rapid reduction process endows the P-CoCH with a unique porous structure, larger electrochemical active surface area and abundant activity sites. Therefore, the as-prepared P-CoCH nanowire core/shell arrays show superior HER performance with a low overpotential of 69 mV and a small Tafel slope of 47 mV dec at a current density of 10 mA cm. In addition, the P-CoCH electrocatalyst demonstrates an excellent cycling stability without any obvious decay after 24 h continuous operation at 100 mA cm current density. This study might provide a new insight into the rapidly construction of efficient HER Co-based electrocatalysts and beyond.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1039/d3cc04591a | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Electrochemical deposition of Ni on arrays of GaAs nanowires with n-type channels.
Nanotechnology
December 2024
Ioffe Institute, Politekhnicheskaya st. 29, Sankt-Peterburg, 194021, RUSSIAN FEDERATION.
The processes of electrochemical deposition of Ni on vertically aligned GaAs nanowires (NWs) grown by molecular-beam epitaxy (MBE) using Au as a growth catalyst on Si(111) substrates were studied. Based on the results of electrochemical deposition, it was concluded that during the MBE synthesis of NWs the self-induced formation of conductive channels can occur inside NWs, thereby forming quasi core-shell nanowires. Depending on the length of the channel compare to the NW heights and the parameters of electrochemical deposition, the different hybrid metal-semiconductor nanostructures, such as Ni nanoparticles on GaAs NW side walls, Ni clusters on top ends of GaAs NWs, core-shell Ni/GaAs NWs, were obtained.
View Article and Find Full Text PDFNon-toxic core-shell nanowires for extracellular vesicle scavenging.
Chem Commun (Camb)
December 2024
Department of Life Science and Technology, Institute of Science Tokyo, Nagatsuta 4259, Midori-ku, Yokohama 226-8501, Japan.
Extracellular vesicles (EVs) from cancer cells promote abnormal growth in normal cells, potentially leading to cancer proliferation. We developed a nanowire-based EV-elimination device that efficiently eliminated EVs without toxicity. This method restored normal growth in mammary gland cells cultured with breast adenocarcinoma-derived EVs containing medium treated with the device.
View Article and Find Full Text PDFGallium nitride-based nanowires (NWs) overcome heteroepitaxy limits, enabling GaN-on-silicon devices, and offer high sensitivity for detection, sensing, and photocatalysis. Additional nanowire coating enhances their performance, protects against photoadsorption, and enables control over structural and optical properties. In this work, we investigate core-shell GaN-(Al/Hf)O nanowires, which meet the aforementioned expectations.
View Article and Find Full Text PDFElastic limit and relaxation of GaAs/In(Al,Ga)As core/shell nanowires for near-infrared applications.
Nanotechnology
December 2024
School of Physics, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
Article Synopsis
- * Researchers mapped the three-dimensional strain field and identified how indium content in the shell impacts the strain distribution and plastic relaxation processes.
- * The study found that although axial strains are uniform, radial and tangential strain gradients occur due to strain concentration at interfaces, affecting the growth strategies for these nanowires.
Oxidation-Resistant Cu-Based Nanowire Transparent Electrodes Activated by an Exothermic Reduction Reaction.
ACS Nano
December 2024
University Bordeaux, CNRS, Bordeaux INP, ICMCB, UMR 5026, F-33600 Pessac, France.
This article describes an approach to making highly stable copper nanowire networks on any type of substrates. These nanostructured materials are highly sought after for, among other applications, the development of next-generation flexible electronics. Their high susceptibility to oxidation in air currently limits their use in the real world.
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!