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Core-shell cobalt-iron silicide electrocatalysts with enhanced bifunctional performance in hydrogen and oxygen evolution reactions.
J Colloid Interface Sci
November 2024
State Key Laboratory of Fine Chemicals, School of Chemistry, Dalian University of Technology, Dalian 116024, PR China; College of Environmental and Chemical Engineering, Dalian University, Dalian 116622, PR China. Electronic address:
Article Synopsis
- Hydrogen production through water electrolysis is gaining popularity as a green energy solution, and developing efficient bifunctional electrocatalysts is vital for its progress.
- This study successfully synthesized core-shell structured bifunctional transition metal silicide electrocatalysts using a magnesium thermal reduction method, resulting in a protective silicon oxide shell.
- The cobalt-iron silicide catalyst exhibited better performance in oxygen and hydrogen evolution reactions compared to single metal catalysts, maintaining stability after continuous use, indicating its potential for hydrogen production applications.
Griffiths-like behavior and magnetocaloric properties of rare-earth silicide TbCoSi.
J Phys Condens Matter
February 2024
Intermetallics and Non-Linear Optics Laboratory, Department of Physics, National Institute of Technology, Tiruchirappalli 620 015, India.
Novel rare-earth silicide, TbCoSicompound, crystallizes in LuCoGastructure, a distorted substitution variant of thestructure. The compound exhibits a complex magnetic state, with a ferromagnetic transition at 58 K, followed by successive antiferromagnetic transitions at 24 K and 8 K, respectively. Isothermal and magnetic hysteresis studies indicate the prominence of competing antiferro and ferromagnetic interactions in the compound.
View Article and Find Full Text PDFStructural, chemical, and magnetic investigation of a graphene/cobalt/platinum multilayer system on silicon carbide.
Nanotechnology
February 2024
Fakultät Physik/DELTA, TU Dortmund University, D-44221 Dortmund, Germany.
We investigate the magnetic interlayer coupling and domain structure of ultra-thin ferromagnetic (FM) cobalt (Co) layers embedded between a graphene (G) layer and a platinum (Pt) layer on a silicon carbide (SiC) substrate (G/Co/Pt on SiC). Experimentally, a combination of x-ray photoemission electron microscopy with x-ray magnetic circular dichroism has been carried out at the Co L-edge. Furthermore, structural and chemical properties of the system have been investigated using low energy electron diffraction (LEED) and x-ray photoelectron spectroscopy (XPS).
View Article and Find Full Text PDFHeterostructured Cobalt Silicide Nanocrystals: Synthesis in Molten Salts, Ferromagnetism, and Electrocatalysis.
J Am Chem Soc
September 2023
Sorbonne Université, CNRS, Laboratoire de Chimie de la Matière Condensée de Paris (CMCP), 4 place Jussieu, F-75005 Paris, France.
Nanoscale heterostructures of covalent intermetallics should give birth to a wide range of interface-driven physical and chemical properties. Such a level of design however remains unattainable for most of these compounds, due to the difficulty to reach a crystalline order of covalent bonds at the moderate temperatures required for colloidal chemistry. Herein, we design heterostructured cobalt silicide nanoparticles to trigger magnetic and catalytic properties in silicon-based materials.
View Article and Find Full Text PDFFaceting/Roughening of WC/Binder Interfaces in Cemented Carbides: A Review.
Materials (Basel)
May 2023
Element Six GmbH, Staedeweg 18-24, 36151 Burghaun, Germany.
Hardmetals (or cemented carbides) were invented a hundred years ago and became one of the most important materials in engineering. The unique conjunction of fracture toughness, abrasion resistance and hardness makes WC-Co cemented carbides irreplaceable for numerous applications. As a rule, the WC crystallites in the sintered WC-Co hardmetals are perfectly faceted and possess a truncated trigonal prism shape.
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