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Key Technical Parameters of Platinum Vanadium Carbon Catalyst

Aug 07/2024 11:41:30

Platinum vanadium carbon is a carbon-based catalyst containing platinum (Pt) and vanadium (V) that is commonly used in applications such as fuel cells and electrochemical reactions. It combines the high catalytic activity of platinum with the synergistic effect of vanadium, resulting in excellent performance in some specific electrochemical reactions. The following are some key technical parameters of platinum vanadium carbon catalyst:

Platinum content:

Usually measured as mass fraction (wt.%), common platinum content is between 10% and 40%.

The specific content depends on the specific application requirements. For example, 20% platinum/carbon is common in fuel cell applications.

Vanadium content:

The vanadium content is also expressed as mass fraction, which is lower but still has a significant impact on catalytic performance.

The common range is between 1% and 10%, and the specific content is adjusted according to application requirements.

Particle Size:

The nanoparticle size of platinum and vanadium particles typically ranges from 2 to 5 nanometers.

Particle size has an important influence on the surface area and activity of the catalyst.

Specific Surface Area:

This parameter represents the total surface area of the catalyst active particles and is usually measured using the BET method.

The higher the specific surface area, the higher the activity. Common specific surface areas range from 200 square meters/gram (m²/g) to 1000 square meters/g.

Type of Carbon Support:

Commonly used carbon carriers include carbon black (such as Vulcan XC-72), graphene, carbon nanotubes, etc.

The properties of the support (such as conductivity, physical strength) directly affect the performance of the catalyst.

Electrochemical Surface Area (ECSA):

ECSA is a parameter that evaluates the active area of a catalyst in an electrochemical reaction.

The unit is square meter per gram of platinum (m²/g Pt), usually between 50 and 150 m²/g Pt.

Pore Volume and Distribution:

The pore structure affects the transport characteristics of the catalyst (such as gas diffusion, electrolyte penetration).

Characterization is usually performed by methods such as nitrogen adsorption.

Durability and Stability:

Under long-term operating conditions, catalyst stability is a key performance indicator.

These include stability in acidic/alkaline environments, thermal stability, and lifetime in electrochemical cycles.

Electrocatalytic Activity:

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Activity in electrochemical reactions such as oxygen reduction reaction (ORR), hydrogen oxidation reaction (HOR), and methanol oxidation reaction (MOR).

It is measured by electrochemical testing methods such as cyclic voltammetry (CV) and linear sweep voltammetry (LSV).

The above parameters are the main indicators to measure and characterize the performance of platinum vanadium carbon catalyst. Specific parameter values and test conditions can vary based on application requirements and different manufacturers' standards.

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Key Technical Parameters of Platinum Vanadium Carbon Catalyst

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