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Homocoupling of terminal alkynes to 1,3-diynes has been investigated with Cu(II)-modified clay under mild and operationally simple conditions without the use of any ligand or a stabilizing agent. The catalyst is robust, ecofriendly, efficient, furnishes good to excellent yields of the desired products and can be reused several times with negligible loss in catalytic activity.
The steam reforming of methane over Cu/Co 6 Al 2 mixed oxides with different copper contents was studied. The Co 6 Al 2 support was prepared via the hydrotalcite route. It was thermally stabilized at 500°C, impregnated with 5wt.%, 15wt.% or 25wt.% copper using copper (II) nitrate Cu(NO 3 ) 2 ·3H 2 O precursor and then calcined again at 500°C...
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