Nano palladium for cresol hydrogenation catalysis
Product name: nano Palladium powder
Particle size: ＜10nm
Purity: 99.95%
Package: 1g, 5g, 10g, 50g, 100g etc in bottle or plactic bags
Appearance: solid black powder
Available documents; COA, MSDS, TEM image, etc
We regularly offer pure nano Pd powder
Customize Pd/C material, nano Pd dispersion also available.
Cresol belongs to lignin derived phenols, and nanopalladium is a very classic precious metal catalytic material for this reaction. Generally, bare nanopalladium powder is not directly used, but mostly used as a support (Pd/C, Pd/oxide carrier), and bare nanopalladium is prone to aggregation and deactivation.
Reaction pathway (2 main directions)
1) Complete hydrogenation of aromatic ring: cresol → methylcyclohexanol (main product); Stronger conditions will further lead to excessive hydrogenation and ring opening;
2) Hydrodeoxygenation HDO: cresol → toluene (dehydroxylation, preparation of aromatic hydrocarbons, requires coordination of carrier with acidic sites).
Naked nano palladium mainly promotes aromatic ring hydrogenation; To achieve high toluene yield, a dual functional system of palladium and acidic carrier (HZSM-5, Al ₂ O ∝) is needed.
The reason why palladium has become the preferred material for catalytic hydrogenation of phenols such as cresol:
*As a transition metal, palladium's d-orbital structure makes it the optimal choice for phenolic hydrogenation catalysis. In the 10th column of transition metals, Ni has too slow reaction activity and Pt has too fast reaction activity, resulting in excessive side reactions. However, palladium has moderate reaction activity and can effectively activate unsaturated bonds and hydrogen gas, exhibiting balanced activity and selectivity in hydrogenation reactions
*Nanoscale palladium particles also have additional advantages: high specific surface area and strong sensitivity to surface electronic structure. The d-electronic structure changes at the nanoscale, which can enhance the adsorption ability of organic molecules such as cresol. The particle surface is prone to interact with hydrogen gas and has good hydrogen gas adsorption and dissociation ability. The high dispersion state can also significantly improve the contact efficiency of the reaction interface
*The core requirements for phenolic hydrogenation catalysis and the design direction of palladium catalysts
Cresols belong to phenolic compounds, and the core goal of their hydrogenation catalysis is to obtain the target product with high selectivity and avoid excessive hydrogenation side reactions. Traditional bifunctional catalysts are prone to excessive hydrogenation to produce cyclohexanol, while the new palladium nanocatalyst can precisely control the reaction pathway through carrier design and interface regulation
Mature mass production: loaded palladium carbon Pd/C, mainstream industrial fine chemical cresol hydrogenation, nano palladium particle loaded activated carbon
Above for your reference only, application details needs your own testing!
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