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

IF 3.9 2区化学 Q2 CHEMISTRY, PHYSICAL

Molecular Catalysis Pub Date : 2025-03-22 DOI:10.1016/j.mcat.2025.115029

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

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Abstract

The bimetallic oxide dispersed on silanol rich SBA-15-OH was designed for the synthesis of cyclic carbonates from epoxides and CO₂. 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, N₂-sorption, CO₂ and NH₃-TPD, H₂-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.

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来源期刊

Molecular Catalysis Chemical Engineering-Process Chemistry and Technology

CiteScore

6.90

自引率

10.90%

发文量

700

审稿时长

40 days

期刊介绍： Molecular Catalysis publishes full papers that are original, rigorous, and scholarly contributions examining the molecular and atomic aspects of catalytic activation and reaction mechanisms. The fields covered are: Heterogeneous catalysis including immobilized molecular catalysts Homogeneous catalysis including organocatalysis, organometallic catalysis and biocatalysis Photo- and electrochemistry Theoretical aspects of catalysis analyzed by computational methods