catalysts were prepared using a solid-phase method to prepare silicate-1 molecular sieves with Cu, Zn, and Al components encapsulated in them, and their catalytic performance for CO hydrogenation was evaluated in a fixed-bed reaction. The structural and surface properties of the catalysts were characterized using X-ray diffraction, transmission electron microscopy, N 2 physisorption, and X-ray photoelectron spectroscopy and correlated with the catalytic performance. The results showed that the use of structurally simple S-1 immobilized CuZnAI nanoparticles (CZA@S-1) was effective in enhancing the conversion of ethanol, where C 2+ OH/ROH up to 50.63% and ROH selectivity up to 27.27% were achieved, and no deactivation was observed within six days. The characterization results indicate that the interaction between CuZn in the CZA@S-1 catalysts is stronger than that between CuAl and ZnAl, that the CuZn active component is able to supply electrons to the molecular sieve, and that the core−shell structure promotes the adsorption and dissociation of CO and enhances C−C coupling. In situ diffuse reflectance infrared Fourier transform spectroscopy measurements of the reaction intermediates for each catalyst inferred a pathway for C−C coupling to ethanol, which provides an alternative pathway to the CuZnAl conventional catalyst.
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