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Stability test for the nonreduced Cs–Ni/CeO2 catalyst, switching temperature from 350 to 700 °C. CO2 conversion is shown as the dotted line, CH4 selectivity as red bars, and CO selectivity as blue bars. Conditions: atmospheric pressure, WHSV = 12,000 mL gcat–1 h–1, H2/CO2 = 4:1.
