Modern Chemistry & Applications

Structural effect of the CuxSn1-x intermetallic catalyst prepared by a mechanical alloying technique in phenol hydroxylation

Joint Event on 19^th International Conference on Medicinal Chemistry & Multi Targeted Drug Delivery & International Conference on Catalysis and Pyrolysis

November 05-06, 2018 | San Francisco, USA

Sakollaphat Pithakratanayothin, Ruangdaj Tongsri, Thanyalak Chaisuwan and Sujitra Wongkasemjit

Chulalongkorn University, Thailand

Scientific Tracks Abstracts: Mod Chem Appl

Abstract:

Three main factors generally alter the catalytic activity. Those are the type of support material, catalyst size and addition of a second metal (i.e. alloying or intermetallic). The latter two factors result in changing electronic and geometric effects. In this work, both electronic and geometric effects were studied, using Cu and Sn as the active metals and phenol hydroxylation as a molecular probe to study its catalytic activity. After the mechanically alloyed processing of Cu and Sn, the results showed that the geometric effect strongly influenced on the catalytic activity and the cubic sorosite crystal structure of CuxSn1-x intermetallic provided the dominant active site. Moreover, the ensemble crystal structures of monoclinic ?-Cu6Sn5 and orthorhombic ?-Cu3Sn could govern the conversion up to 84%. The monoclinic ?-Cu6Sn5 crystal structure gave higher catechol (CAT) selectivity than the cubic phase crystal structure, while the influence of orthorhombic?-Cu3Sn resulted in a greater selectivity of catechol. On the other hand, the electronic effect strongly depended on the surface structure.

Biography :

Sakollaphat Pithakratanayothin was born and raised in Bangkok, Thailand, after graduating Master degree in Petrochemical Technology from the Petroleum and Petrochemical College, Chulalongkorn University, he decided to study further for his Doctor of Philosophy degree in Polymer Science and has focused on a new pathway to heterogeneous catalyst synthesis, viz. mechanical alloying. After finishing an internship at Paul Scherrer Institute (PSI), he has discovered active species of copper on his project using X-ray Absorption Spectroscopy (XAS).

E-mail: ham6651@gmail.com