期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 8, 期 39, 页码 14765-14774出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.0c03860
关键词
CO2 hydrogenation; Formic acid synthesis; Hybrid silica; PMO; Pd nanoparticles
资金
- CSIR
- Council of Scientific and Industrial Research (CSIR), INDIA
Development of a heterogeneous catalyst capable of selective transformation of CO2 to valuable products still remains a challenge. In this article, we account for the surfactant-directed synthesis of a new framework-incorporated nitrogen-containing periodic mesoporous organosilica nanosphere (NPMO). A thoroughly characterized N-incorporated hybrid PMO was utilized as a platform for stabilizing well-dispersed and easily accessible Pd nanoparticles (Pd-NPMO) without using any stabilizing agents or expensive dendrimers. Further, this bifunctional hybrid catalyst has been demonstrated to heterogeneously catalyze aqueous phase CO2 hydrogenation (CO2/H-2 ratio 1:3) for the direct synthesis of formate under 4 MPa pressure and at 100 degrees C. To validate the superior performance of the Pd-NPMO catalyst, we compared the activity with Pd-SBA-15 catalysts, and the results showed a 10-fold increase in turnover frequency of 108 h(-1) using Pd on NPMO which envisaged the crucial role of nitrogen sites in this catalyst to boost the CO2 valorization to formate.
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