Selective Hydrogenation Processes in Catalytic Systems

Selective hydrogenation occupies a pivotal role in modern chemical manufacture, enabling the precise reduction of unsaturated bonds in hydrocarbon streams to valuable intermediates while avoiding full saturation. At its core, the process relies on finely tuned catalysts—often noble or base metals dispersed as nanoparticles on high-surface-area supports—where active sites facilitate both hydrogen dissociation and controlled adsorption of target substrates. Key challenges lie in suppressing over-hydrogenation, maintaining catalyst stability and achieving high turn-over frequencies under mild conditions. Advances in particle-size engineering have revealed that small changes in nanoparticle dimensions or support interactions can dramatically alter the fraction of low-coordination sites, thereby steering selectivity towards desired alkenes rather than alkanes. Alloying and electronic promotion, including the incorporation of secondary metals or defect-rich carbon matrices, further modulate the adsorption geometry of reactants and hydrogen, enhancing both activity and resistance to deactivation. Emerging approaches employ metal–organic frameworks as sacrificial templates to produce uniform bimetallic catalysts with tailored morphologies. Together, these strategies underscore the balance between fundamental surface science and practical reactor design, supporting applications from polymer feedstock purification to fine chemical synthesis and sustainable fuel upgrading.

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Selective Hydrogenation Processes in Catalytic Systems publication trend

The graph below shows the total number of articles in selective hydrogenation processes in catalytic systems across all publications each year (not limited to Nature Index journals).

Technical terms

Selective hydrogenation: The addition of hydrogen to specific unsaturated bonds in a mixture, favouring one substrate or functional group over others.

Turnover frequency (TOF): A measure of catalytic activity defined as the number of reactant molecules converted per active site per unit time.

Over-hydrogenation: Unintended further reduction of partially hydrogenated products to fully saturated species.

Metal–organic framework (MOF): A porous network material comprising metal ions or clusters coordinated to organic ligands, often used as templates or supports.

Catalyst support: A high-surface-area solid, such as carbon or oxide, that disperses and stabilises active metal nanoparticles, modulating their electronic and geometric properties.

References

1. Influence of particle size in Pd-catalysed selective hydrogenation of 1,3-butadiene. Journal of Catalysis (2023).
2. Particle Size Effects in the Selective Hydrogenation of Alkadienes over Supported Cu Nanoparticles. ChemCatChem (2022).
3. MOF-Derived ZrO2-Supported Bimetallic Pd–Ni Catalyst for Selective Hydrogenation of 1,3-Butadiene. Molecules (2024).