Hydrogenation of Carbon Dioxide to Dimethyl Ether on CuO-ZnO/ZSM-5 Catalysts: Comparison of Powder and Electrospun Structures.

The promising direct dimethyl ether (DME) production through CO hydrogenation was systematically analyzed in this research by synthesizing, characterizing, and testing several catalytic structures. In doing so, various combinations of precipitation and impregnation of copper- and zinc-oxides (CuO-ZnO) over a ZSM-5 zeolite structure were applied to synthesize the hybrid catalysts capable of hydrogenating carbon dioxide to methanol and dehydrating it to DME. The resulting catalytic structures, including the co-precipitated, sequentially precipitated, and sequentially impregnated CuO-ZnO/ZSM-5 catalysts, were prepared in the form of particle and electrospun fibers with distinguished chemical and structural features.

Core-Sheath Pt-CeO/Mesoporous SiO Electrospun Nanofibers as Catalysts for the Reverse Water Gas Shift Reaction.

One-dimensional (1D) core-sheath nanofibers, platinum (Pt)-loaded ceria (CeO) sheath on mesoporous silica (SiO) core were fabricated, characterized, and used as catalysts for the reverse water gas shift reaction (RWGS). CeO nanofibers (NFs) were first prepared by electrospinning (ES), and then Pt nanoparticles were loaded on the CeO NFs using two different deposition methods: wet impregnation and solvothermal. A mesoporous SiO sheath layer was then deposited by sol-gel process.