Tsai, Ding HueiDing HueiTsaiWu, Tung TaTung TaWuLin, Hung ChinHung ChinLinChueh, Lu YuLu YuChuehLin, Kun HanKun HanLinWen-Yueh YuPan, Yung TinYung TinPan2024-03-192024-03-192024-01-0118614728https://scholars.lib.ntu.edu.tw/handle/123456789/641109Activation of inert CO2 molecules for the reverse water gas shift (RWGS) reaction is tackled by incorporating magnesium oxide as a support material for copper, forming a Cu/MgO supported catalyst. The RWGS performance is greatly improved when compared with pure Cu or carbon supported Cu (Cu/C). Operating under a weight hourly space velocity (WHSV) of 300,000 mL ⋅ g−1 ⋅ h−1, the Cu/MgO catalyst demonstrates high activity, maintaining over 70 % equilibrium conversion and nearly 100 % CO selectivity in a temperature range of 300–600 °C. In contrast, both Cu/C and commercial Cu, even at ten-times lower WHSV, can only achieve up to 40 % of the equilibrium conversion and quickly deactivated due to sintering. Based on the studies of in-situ temperature resolved infrared spectroscopy and temperature programmed desorption, the improved RWGS performance is attributed to the unique adsorption behavior of CO2 on Cu/MgO. Density functional theory studies provides a plausible explanation from a surface reaction perspective and reveals the spill-over property of CO2 from MgO to Cu being critical.enCO -IR-TPD 2 | Copper | MgO | RWGS[SDGs]SDG6[SDGs]SDG7[SDGs]SDG13journal article10.1002/asia.202300955383326802-s2.0-85185910920https://api.elsevier.com/content/abstract/scopus_id/85185910920