01615nas a2200181   4500008004100000022001400041245008200055210006900137260000900206300001400215490000700229520098500236100002301221700002801244700002101272700003201293856010801325       2023                        eng d  a0888-588500aWadsworth-emmons reaction by using the fluorapatite catalyst: kinetic studies0 aWadsworthemmons reaction by using the fluorapatite catalyst kine  cMAY   a7901-79110 v623 a<p>
	Wadsworth-Emmons reaction was successfully carriedout byusing the fluorapatite (FAP) catalyst. The reaction of 2-methoxybenzaldehydeand triethylphosphonoacetate using FAP afforded &amp; alpha;,&amp; beta;-unsaturatedester with 100% conversion and 80% selectivity. A kinetic model wasvalidated at different temperatures by Langmuir-Hinshelwood-Hougen-Watson(LHHW), and the absence of mass transfer resistance was verified bythe Weisz Prater criterion. The effect of different catalysts, temperature,catalyst loading, solvent, mole ratio, and speed of stirring was studied.The FAP catalyst was characterized by Fourier transform infrared spectroscopy,Brunauer-Emmett-Teller method, nitrogen adsorption-desorption,transmission electron microscopy, energy-dispersive X-ray spectroscopy,temperature programmed desorption (TPD-NH3), X-ray diffraction,and X-ray photoelectron spectroscopy. The FAP catalyst was found tobe stable up to three recycles with no loss in activity.</p>
1 aVishwakarma, Rakhi1 aVinod, Chathakudath, P.1 aRathod, Virendra1 aKantam, Mannepalli, Lakshmi  uhttp://library.ncl.res.in/content/wadsworth-emmons-reaction-using-fluorapatite-catalyst-kinetic-studies01870nas a2200265   4500008004100000022001400041245011700055210006900172260001100241490000700252520097200259653001701231653002401248653001801272653001901290100002601309700001501335700001601350700001601366700002701382700002201409700002801431700002501459856012001484       2023                        eng d  a1433-785100aWurtzite CuGaS2 with an in-situ-formed CuO layer photocatalyzes CO2 conversion to ethylene with high selectivity0 aWurtzite CuGaS2 with an insituformed CuO layer photocatalyzes CO  cFEB 200 v623 a<p>We present surface reconstruction-induced C-C coupling whereby CO2 is converted into ethylene. The wurtzite phase of CuGaS2. undergoes in situ surface reconstruction, leading to the formation of a thin CuO layer over the pristine catalyst, which facilitates selective conversion of CO2 to ethylene (C2H4). Upon illumination, the catalyst efficiently converts CO2 to C2H4 with 75.1 % selectivity (92.7 % selectivity in terms of R-electron) and a 20.6 mu mol g(-1) h(-1) evolution rate. Subsequent spectroscopic and microscopic studies supported by theoretical analysis revealed operando-generated Cu2+, with the assistance of existing Cu+, functioning as an anchor for the generated *CO and thereby facilitating C-C coupling. This study demonstrates strain-induced in situ surface reconstruction leading to heterojunction formation, which finetunes the oxidation state of Cu and modulates the CO2 reduction reaction pathway to selective formation of ethylene.</p>
10aC-C coupling10acharge polarization10aCO2 reduction10aPhotocatalysis1 aChakraborty, Subhajit1 aDas, Risov1 aRiyaz, Mohd1 aDas, Kousik1 aSingh, Ashutosh, Kumar1 aBagchi, Debabrata1 aVinod, Chathakudath, P.1 aPeter, Sebastian, C.  uhttp://library.ncl.res.in/content/wurtzite-cugas2-situ-formed-cuo-layer-photocatalyzes-co2-conversion-ethylene-high