Work

Bimetallic oxide catalysis meets silanol-enhanced synergy: A winning combination for efficient CO2 fixation by cycloaddition with styrene oxide

Year: 2025

Type: article

Abstract: The bimetallic oxide dispersed on silanol rich SBA-15-OH was designed for the synthesis of cyclic carbonates from epoxides and CO 2 . The SBA-15-OH was synthesized via desilication and active metals were loaded by sol-gel method. Pure Sn-Ni oxide with a low surface area and lesser activity was modified by dispersing it on a high surface area SBA-15-OH. The different characterization techniques such as XRD, N 2 -sorption, CO 2 and NH 3 -TPD, H 2 -TPR, SEM-EDX, TEM and XPS confirmed that the surface silanol group acts as anchoring site for the enhanced metal oxide-support interaction. Supported Sn-Ni oxide exhibited 16-fold better activity than pure Sn-Ni oxide, due to improved dispersion, which enhances the accessibility of reactants to the catalytic sites. Under the optimized reaction conditions 10Sn5Ni/SBA-15-OH gave 92.9 % styrene oxide conversion and 84.3 % selectivity for styrene carbonate. The catalyst is recyclable and the flexibility of the catalyst is tested for different epoxides with CO 2.

Source: Molecular Catalysis

DOI: 10.1016/j.mcat.2025.115029

Authors: Chaitra N. Mallannavar, S. Sujith, Shrinidhi D. Patil, Sanjeev P. Maradur, Ganapati V. Shanbhag

Institutions: Manipal Academy of Higher Education, Poornaprajna Institute of Scientific Research

Language: English

Topic: Carbon dioxide utilization in catalysis

Subfield: Process Chemistry and Technology

Field: Chemical Engineering

Domain: Physical Sciences

SDG: Responsible consumption and production

Open Access status: hybrid

Estimated APC paid: $3,110