Fig. 2: Dispersion mechanism and dispersion threshold of ZnO onto ZnCr2O4. | Nature Communications

Fig. 2: Dispersion mechanism and dispersion threshold of ZnO onto ZnCr2O4.

From: ZnOx overlayer confined on ZnCr2O4 spinel for direct syngas conversion to light olefins

Fig. 2: Dispersion mechanism and dispersion threshold of ZnO onto ZnCr2O4.The alternative text for this image may have been generated using AI.

a H2 and H2O evolution upon temperature-programmed heating of ZnCr2O4 packed below Zn metal or ZnO, separated by an inert layer of quartz wool with the comparison of ZnCr2O4-ZnO (same as ZnO-ZnCr2O4) and ZnCr2O4. b FTIR spectra of OH groups on treated ZnCr2O4 and ZnCr2O4@ZnOx samples with various ZnO loadings. c Schematic illustrating formation mechanism of ZnCr2O4@ZnOx during syngas treatment. d Surface OH amount on ZnCr2O4@ZnOx as a function of ZnO loading. e Dispersion threshold of ZnO on ZnCr2O4 determined by XRD and XPS.

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