Cu(II)/MCM-41, Cu(I)/MCM-41 and Cu(0)/MCM-41 materials were prepared with Cu[OCHMeCH2NMe2]2/MCM-41 as precursor under controlled conditions. The states of copper on the resulting samples were characterized by temperature programmed reduction (TPR), UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS), X-ray photoelectron spectroscopy (XPS), photoluminescence spectroscopy (PL), infrared spectroscopy (FTIR) of NO and CO adsorption, X-ray diffraction (XRD), and N2 adsorption. It was shown that pure Cu(II)/MCM-41 can be acquired by calcining Cu[OCHMeCH2NMe2]2/MCM-41 in pure oxygen at 573 K. Pure Cu(I)/MCM-41 can be obtained by reducing the as-prepared Cu(II)/MCM-41 in a CO/He atmosphere at 473 K, while pure Cu(0)/MCM-41 can be obtained viareduction of the Cu(II)/MCM-41 in a CO/He atmosphere at 673 K. The Cu(II)–O and Cu(I)–O species were showed to be highly dispersed on the surface of MCM-41 as isolated sites. The study provides an alternative method for the preparation of pure copper metal or copper oxide supported materials.
You have access to this article
Please wait while we load your content...
Something went wrong. Try again?