Related Experiment Video
Updated: Mar 10, 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
4.4K
Cu(OH)2 @CoCO3 (OH)2 ·nH2 O Core-Shell Heterostructure Nanowire Array: An Efficient 3D Anodic Catalyst for Oxygen
Lisi Xie1, Chun Tang1, Kunyang Wang2
1Chemical Synthesis and Pollution Control, Key Laboratory of Sichuan Province, School of Chemistry and Chemical Engineering, China West Normal University, Nanchong, 637002, Sichuan, China.
Small (Weinheim an Der Bergstrasse, Germany)
|December 8, 2016
Summary
A novel core-shell heterostructure nanowire array, copper hydroxide @cobalt carbonate hydroxide hydrate (CCHH), demonstrates superior performance as an oxygen evolution reaction catalyst in alkaline media, also showing efficiency in methanol electrooxidation.
Area of Science:
- Electrochemistry
- Materials Science
- Catalysis
Background:
- Developing efficient electrocatalysts is crucial for energy conversion technologies.
- Cobalt-based materials are promising for oxygen evolution reactions (OER) but require optimization.
- 3D nanostructures can enhance catalytic activity by increasing surface area and facilitating mass transport.
Purpose of the Study:
- To synthesize and characterize a novel Cu(OH)2 @CoCO3 (OH)2 ·nH2 O (CCHH) core-shell heterostructure nanowire array.
- To evaluate its performance as an oxygen evolution reaction (OER) catalyst in alkaline media.
- To assess its potential for methanol electrooxidation.
Main Methods:
- Synthesis of core-shell heterostructure nanowire arrays.
- Electrochemical characterization using techniques like cyclic voltammetry and chronoamperometry.
- Performance evaluation in 1.0 m KOH electrolyte.
Main Results:
- The CCHH core-shell heterostructure nanowire array exhibits robust catalytic activity for OER.
- It requires an overpotential of 270 mV to achieve a current density of 50 mA cm-2 in 1.0 m KOH.
- This performance surpasses that of CCHH nanowire arrays on copper foam and other reported Co-based OER catalysts in alkaline media.
- The catalyst also demonstrates efficiency in methanol electrooxidation.
Conclusions:
- The Cu(OH)2 @CoCO3 (OH)2 ·nH2 O core-shell heterostructure nanowire array is a highly effective 3D catalyst for the oxygen evolution reaction.
- Its enhanced performance in alkaline media makes it a promising candidate for electrochemical applications.
- The catalyst's dual functionality for OER and methanol electrooxidation broadens its potential utility.
Keywords:
Cu(OH)2@CoCO3(OH)2·nH2Oanodic catalystheterostructure nanowire arraysmethanol electrooxidationoxygen evolution reactionMore Related Videos
Related Concept Videos
01:22Heterogeneous Catalysis
51
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...
51
01:28Electrochemical Cells
51
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...
51
01:24Electrochemical Systems
45
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,...
45
01:26Thermal and Photochemical Electrocyclic Reactions: Overview
3.1K
Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.
3.1K
01:06Interfacial Electrochemical Methods: Overview
1.0K
Interfacial electrochemical methods focus on the phenomena occurring at the boundary between an electrode and a solution, as opposed to bulk methods that concentrate on the solution's overall properties. These interfacial methods are classified as either static or dynamic based on the presence of a nonzero current in the electrochemical cell and the consistency of analyte concentrations. Static methods, such as potentiometry, measure the cell's potential without any significant current...
1.0K