Comparative study on cubic and tetragonal Cu–CeO2–ZrO2 catalysts for water gas shift reaction

Cu–Ce0.8Zr0.2O2 and Cu–Ce0.2Zr0.8O2 catalysts have been applied for water gas shift reaction to understand the effect of cubic/tetragonal structure of CeO2–ZrO2 support. Cubic Cu–Ce0.8Zr0.2O2 catalyst shows higher activity (17.4% at 320 °C) than tetragonal Cu–Ce0.2Zr0.8O2 catalyst at the high gas hourly space velocity of 72,152 h−1 due to the enhanced oxygen mobility and high Cu dispersion (7.8%). In addition, cubic Cu–Ce0.8Zr0.2O2 catalyst exhibits a stable activity at 320 °C for 25 h resulting from a strong resistance against sintering.

Graphical abstractCu–Ce0.8Zr0.2O2 and Cu–Ce0.2Zr0.8O2 catalysts have been applied for water gas shift reaction to understand the effect of cubic/tetragonal structure of CeO2–ZrO2 support. Cubic Cu–Ce0.8Zr0.2O2 catalyst shows higher activity (17.4% at 320 °C) than tetragonal Cu–Ce0.2Zr0.8O2 catalyst at the high gas hourly space velocity of 72,152 h−1 due to the enhanced oxygen mobility and high Cu dispersion (7.8%). In addition, cubic Cu–Ce0.8Zr0.2O2 catalyst exhibits a stable activity at 320 °C for 25 h resulting from a strong resistance against sintering.Figure optionsDownload full-size imageDownload as PowerPoint slide