Related Experiment Video
Updated: May 29, 2026
08:40
Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
Published on: December 6, 2021
Core-shell MoO3-MoS2 nanowires for hydrogen evolution: a functional design for electrocatalytic materials.
Zhebo Chen1, Dustin Cummins, Benjamin N Reinecke
1Department of Chemical Engineering, Stanford University , Stanford, California 94305, United States.
Nano Letters
|September 8, 2011
Summary
We developed novel molybdenum disulfide (MoS2) coated molybdenum oxide (MoO3) core-shell nanowires for enhanced catalytic and protective properties. This advanced material structure optimizes performance in demanding chemical environments.
Area of Science:
- Materials Science
- Nanotechnology
- Chemical Engineering
Background:
- Core-shell nanostructures offer unique properties by combining different materials.
- Molybdenum disulfide (MoS2) is known for its catalytic activity and chemical stability.
- Molybdenum oxide (MoO3) can serve as a conductive core with a high aspect ratio.
Purpose of the Study:
- To synthesize and characterize vertically oriented core-shell nanowires with substoichiometric MoO3 cores and MoS2 shells.
- To leverage the synergistic properties of MoO3 and MoS2 for improved performance.
- To create a robust nanostructure resistant to harsh acidic conditions.
Main Methods:
- Synthesis of vertically oriented core-shell nanowires via low-temperature sulfidization.
- Characterization of nanowire morphology, composition, and structure.
- Evaluation of catalytic activity and corrosion resistance.
Main Results:
- Successfully synthesized core-shell nanowires with substoichiometric MoO3 cores (20-50 nm) and conformal MoS2 shells (2-5 nm).
- Demonstrated facile charge transport through the MoO3 core.
- Showcased excellent catalytic activity and corrosion resistance of the MoS2 shell.
Conclusions:
- The developed core-shell architecture effectively combines the benefits of MoO3 and MoS2.
- This nanostructure presents a promising platform for applications requiring high catalytic activity and durability.
- The design mitigates individual material deficiencies, leading to enhanced overall performance.
More Related Videos
Related Concept Videos
01:22Heterogeneous Catalysis
Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...
01:28Electrochemical Cells
Electrochemical cells are systems that convert chemical energy into electrical energy or use electrical energy to drive chemical reactions. They consist of two electrodes in contact with an electrolyte, where redox reactions enable electron transfer. Most electrochemical cells include two half-cells connected by an external wire for electron flow and a salt bridge for ion flow. The salt bridge contains an electrolyte solution and maintains charge neutrality by allowing ions—not electrons—to...
01:24Electrochemical Systems
Electrochemical systems provide a fascinating insight into the dynamic interplay of charged species within various phases. One notable example is the interaction between a membrane permeable to K⁺ ions but not to Cl⁻ ions, separating an aqueous KCl solution from pure water. As K⁺ ions diffuse through the membrane, they generate net charges on each phase, leading to a potential difference between them.Similarly, when a piece of Zn is immersed in an aqueous ZnSO₄ solution, the Zn metal, composed...
01:23Microbial Fuel Cells
Microbial fuel cells (MFCs) are bioelectrochemical devices that generate electricity by exploiting the metabolic processes of electrogenic bacteria. These systems provide a renewable energy source and serve as an innovative method for treating organic waste, such as wastewater.A typical MFC consists of two chambers: an anoxic (oxygen-free) compartment that houses the bacteria and an oxic (oxygen-rich) compartment that contains oxygen as the terminal electron acceptor. Many MFCs use proton...
01:32Chemiosmosis
Oxidative phosphorylation is a highly efficient process that generates large amounts of adenosine triphosphate (ATP), the basic unit of energy that drives many cellular processes. Oxidative phosphorylation involves two processes— the electron transport chain and chemiosmosis.
Electron Transport Chain
The electron transport chain involves a series of protein complexes on the inner mitochondrial membrane that undergo a series of redox reactions. At the end of this chain, the electrons reduce...
Electron Transport Chain
The electron transport chain involves a series of protein complexes on the inner mitochondrial membrane that undergo a series of redox reactions. At the end of this chain, the electrons reduce...