Abstract
Isothermal hydrogen interaction with unsupported CuO and 15%CuO/ZnO at about 419–427 K has been followed by in-situ X-ray diffraction as monoclinic CuO is replaced by zero-valent Cu° without direct evidence of formation of intermediate Cu2O. Surprisingly, less than half of the copper phases within such samples is X-ray detectable. X-ray analysis indicates that reduction of crystalline CuO in CuO/ZnO catalysts may not be retarded by ZnO, but TPR-TGA suggests that reduction of more amorphous CuO may be so retarded.
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Vong, M.S.W., Sermon, P.A. & Grant, K. In-situ study of reduction of copper catalysts. Catal Lett 4, 15–24 (1990). https://doi.org/10.1007/BF00764866
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DOI: https://doi.org/10.1007/BF00764866