@article { ISI:000249564600009, title = {Copper(II) ion exchanged A1SBA-15: a versatile catalyst for intermolecular hydroamination of terminal alkynes with aromatic amines}, journal = {Journal of Catalysis}, volume = {250}, number = {2}, year = {2007}, month = {SEP}, pages = {274-282}, publisher = {ACADEMIC PRESS INC ELSEVIER SCIENCE}, type = {Article}, address = {525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA}, abstract = {

The hydroarnination reaction offers a very attractive route for the synthesis of alkylated amines and their derivatives with no byproduct formation. AISBA-15 was synthesized by isomorphous substitution of aluminum into the framework of SBA-15, which induces the Bronsted acid sites, and these were exchanged with metal ions such as Cu2+, Zn2+, and Pd2+. The catalysts were characterized by XRD, N-2-sOrption, SEM, TEM, acidity measurements by FT-IR pyridine adsorption, H-2-TPR, (27)AI MAS NMR, and Si-29 MAS NMR. Hydroamination of phenylacetylene (PhAc) with 2,4-xylidine has been used as a test reaction, which gave N-(1-phenylethylidene)-2,4-dimethylaniline with no byproduct formation. CuAlSBA-15 and CuAIMCM-41 showed around three times greater activity in hydroamination of PhAc compared with Cu-clay and Cu-beta, due to the moderate Lewis acidity of Cu2+ present in mesoporous supports. The performance of the CuAlSBA-15 was also determined with different alkynes and amines to evaluate the catalyst{\textquoteright}s general applicability in hydroamination reactions. (c) 2007 Elsevier Inc. All rights reserved.

}, keywords = {A1SBA-15, addition, alkyne, Amine, Copper catalyst, heterogeneous, hydroamination, ion exchange, Mesoporous}, issn = {0021-9517}, doi = {10.1016/j.jcat.2007.06.007}, author = {Shanbhag, Ganapati V. and Joseph, Trissa and Halligudi, Shivaraj B.} } @article { ISI:000325039100047, title = {Ultrasound promoted efficient and green protocol for the expeditious synthesis of 1, 4 disubstituted 1, 2, 3-triazoles using Cu(II) doped clay as catalyst}, journal = {Applied Clay Science}, volume = {80-81}, year = {2013}, month = {AUG}, pages = {351-357}, publisher = {ELSEVIER SCIENCE BV}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

Cu(II) doped clay catalyst has been prepared by an easy technique from inexpensive starting materials and investigated for the one pot synthesis of 1, 4-disubstituted 1, 2, 3-triazoles via Huisgen [3 + 2] cycloaddition under ultrasonic irradiation at room temperature. The catalyst is highly active, selective, and stable and can be reused several times. The prepared catalyst has been characterized by XRD, BET-SA, H-2-TPR, SEM and XPS techniques. This transformation is fast, efficient and does not require nitrogen atmosphere or anoxic conditions and additive. (C) 2013 Elsevier B.V. All rights reserved.

}, keywords = {Catalyst support, Copper catalyst, Crystallization, selectivity, Sustainability}, issn = {0169-1317}, doi = {10.1016/j.clay.2013.06.030}, author = {Dar, Bashir Ahmad and Bhowmik, Amrita and Sharma, Amit and Sharma, Parduman R. and Lazar, Anish and Singh, A. P. and Sharma, Meena and Singh, Baldev} } @article {49565, title = {Unravelling the Cu-Co nanoparticle synergy over Ceria-Zirconia support toward efficient reverse water gas shift (RWGS) conversion under H2 lean conditions}, journal = {Chemical Engineering Journal}, volume = {508}, year = {2025}, month = {MAR}, pages = {160705}, type = {Article}, abstract = {

CO2 emissions leading to global warming and environmental and socio-economic issues have propelled the research community to develop technologies capable of capturing and converting CO2 into valuable products. Controlling the selectivity toward platform molecules like CO, methanol, or methane is a fundamental challenge in CO2 hydrogenation. Supported cobalt nanoparticles are known for hydrocarbon production through FischerTropsch (FT) reaction, and Cu-based catalysts are known for reverse water gas shift (RWGS) reaction. Here, we show that d-band centre can be carefully modulated by making bimetallic combinations of Cu and Co for a highly active RWGS catalyst. An oxygen vacancy-rich nanostructured ceria-zirconia (CZ) support with Cu nanoparticles (2 wt\%) modified with as low as 0.05 wt\% Co shows excellent conversion for CO2 hydrogenation and selectivity for CO below 500 degrees C. The optimized catalyst shows CO2 conversion even under hydrogen lean conditions (H2/ CO2 ratio 0.5:1), with a breakthrough rate of 206023 mmol/gmetal/h for CO at 600 degrees C, having H2 utilization of 80\% for the RWGS process.

}, keywords = {Bimetallic catalyst, Ceria-zirconia, CO 2 hydrogenation, Cobalt catalyst, Copper catalyst, Reverse water gas shift (RWGS), synergistic effect}, issn = {1385-8947}, doi = {10.1016/j.cej.2025.160705}, author = {Jagtap, Anuradha Vijay and Bamnia, Mahesh Kumar and Maibam, Ashakiran and Bajpai, Jyotsna Paliwal and Gupta, Sharad and Thomas, Sharon K. and Dabke, Niteen B. and Vinod, C. P.} }