Nanocatalysis in Bimetallic Systems

Bimetallic nanocatalysis exploits the interplay of two distinct metals at the nanoscale to deliver enhanced activity, selectivity and stability compared with monometallic counterparts. By tuning composition, morphology and interfacial chemistry, it is possible to harness synergistic electronic and geometric effects that modulate adsorption energies, reaction pathways and product distribution. Core–shell, alloyed and heterostructured motifs provide precise control over surface atom arrangement and electronic density, while support materials such as carbon, metal oxides or polymers influence dispersion and prevent sintering. Advances in synthetic approaches—from wet-chemical methods and microemulsions to microwave and sonoelectrochemical techniques—have enabled precise control of particle size, phase segregation and surface enrichment. These developments underpin applications across energy conversion (for example in fuel cells and electrolytic hydrogen production), environmental remediation (including catalytic oxidation of pollutants) and the fine-chemical and pharmaceutical sectors. Ongoing challenges include scalable synthesis with uniform active sites, long-term operational stability and integration into practical devices.

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Nanocatalysis in Bimetallic Systems publication trend

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Technical terms

Bimetallic nanoparticle: A nanoscale particle composed of two different metallic elements, offering unique catalytic properties through electronic and geometric interactions.

Core–shell structure: A bimetallic architecture in which one metal forms a central core surrounded by a shell of the second metal, allowing surface and bulk properties to be decoupled.

Alloy: A homogeneous solid solution of two or more metals at the atomic level, resulting in modified electronic structure and catalytic behaviour.

Microemulsion: A thermodynamically stable dispersion of two immiscible liquids stabilised by surfactants, employed as a confined reaction medium for synthesising uniform nanoparticles.

Turnover frequency: The number of reactant molecules converted to product per active site per unit time, used to quantify catalytic activity.

References

1. Bimetallic nanoparticles via microemulsions: The effects of concentration in surface composition. Colloids and Surfaces A Physicochemical and Engineering Aspects (2024).
2. Sonoelectrochemical Synthesis of Nanoparticles. Molecules (2009).
3. Synthesis of Metal Nanoparticles under Microwave Irradiation: Get Much with Less Energy. Metals (2023).
4. Efficient preparation of nanocatalysts. Case study: green synthesis of supported Pt nanoparticles by using microemulsions and mangosteen peel extract. RSC Advances (2022).