The research team at the Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, has been addressing national strategic needs and pushing the boundaries of global scientific advancements. Their groundbreaking work in "functionalized electrode interfaces—chemical modification to self-assembly" has led to a series of internationally recognized innovations. Recently, this pioneering research was honored with the Second Prize of the National Natural Science Award.
Chemically modified electrodes have become a cornerstone in fields such as energy, materials science, environmental studies, and life sciences. They represent a significant shift from passive observation to active control of electrochemical interfaces. Since their emergence in the mid-1970s, these electrodes have gained increasing importance in both domestic and international chemical research. They enable scientists to understand reaction mechanisms at the interface, analyze microstructures, and explore macroscopic reactions, paving the way for molecular-level investigations into electrode functionality.
In the 1990s, the introduction of self-assembly technology revolutionized electrode surface modification. The ordered, directional, and dense characteristics of self-assembled structures provided an ideal platform for studying electrochemical interfaces. This advancement sparked widespread interest and rapidly positioned self-assembly as one of the most dynamic frontiers in international electrochemistry.
The Changchun Institute took the lead in China’s research on chemically modified electrodes as early as the 1980s. In 1987, they were awarded the Third Prize of the National Natural Science Award. Throughout the 1990s, the team focused on cutting-edge developments, including molecular self-assembly on carbon electrodes, interface microstructure analysis, and the functional relationships of electrodes.
Over the years, they have made significant contributions by developing new methods in electrode modification, self-assembly, characterization, theory, and application. Their work includes:
- Creating more than 90 new types of chemically modified electrodes.
- Designing and extending the ordered assembly of monolayers and multilayers, as well as nanometal films on gold and carbon surfaces at the molecular level.
- Proposing quantitative analysis methods using light penetration and circular dichroism for biomacromolecule conformational changes.
- Developing the EC-SPR device for detection purposes.
- Establishing theories and methods for electrocatalysis on modified electrodes.
- Introducing two novel approaches to study unstable systems and ultrafine electrode electrocatalysis.
- Discovering ion doping/dedoping in conducting polymers and its use in controlled drug release.
- Creating the first novel electrochemical sensor, with commercialized underpotential-deposited nanopalladium DO sensors.
- Proposing integrated methods for separation, enrichment, and determination of trace metals using chemically modified electrodes.
- Demonstrating that methylene blue-based sensors enhance electron transfer in hemoglobin, with broad implications for biosensing and bioelectrochemistry.
Mixed Powder
Tungsten carbide mixed Metal Alloy Powder is commonly used in PTA (Plasma Transferred Arc) welding. PTA welding is a process that involves the deposition of a hardfacing material onto a base metal to provide wear resistance, corrosion resistance, and improved mechanical properties.
Tungsten carbide is a very hard and wear-resistant material, making it ideal for applications where high abrasion resistance is required. It is often mixed with other metals, such as nickel, cobalt, or chromium, to form a metal alloy powder. These metal alloys enhance the properties of the tungsten carbide and improve its compatibility with the base metal.
The tungsten carbide mix metal alloy powder is typically fed into the PTA welding torch, where it is melted and propelled onto the surface of the base metal using a high-energy plasma arc. The molten powder forms a hard, dense coating that bonds with the base metal, providing excellent wear resistance and protection.
The specific composition of the tungsten carbide mix metal alloy powder can vary depending on the application requirements. Different ratios of tungsten carbide and other metals can be used to achieve desired properties, such as hardness, toughness, and corrosion resistance.
Overall, tungsten carbide mix metal alloy powder is a versatile and effective material for PTA welding, offering superior wear resistance and protection for various industrial applications.
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