TY - JOUR
T1 - Revisiting magnesium oxide to boost hydrogen production via water-gas shift reaction
T2 - Mechanistic study to economic evaluation
AU - Jin, Seongmin
AU - Park, Yongha
AU - Bang, Gina
AU - Vo, Nguyen Dat
AU - Lee, Chang Ha
N1 - Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2021/5/5
Y1 - 2021/5/5
N2 - Herein, we report the use of a MgCeOx-supported Cu (MgCuCe) catalyst with a unique bead structure to augment the water-gas shift (WGS) reaction. The MgCuCe catalyst exhibited an exceptionally high reaction rate of 83 μmol g−1 s‒1 at 300 °C, compared with that without MgO (30 μmol g−1 s‒1). Very few studies have focused on MgO-supported catalysts owing to the reports on the inferior activity of MgO. However, this paper reports unprecedented enhancements by introducing MgO and illustrates the WGS reaction mechanism: (1) numerous defects promoted water dissociation and subsequent associative mechanism; (2) the labile oxygen in MgO participated in redox mechanisms. The hydrogen production cost realized due to the use of the MgCuCe was 0.63 USD/kg H2, which is lower than that achieved by using commercial and CeO2-supported catalysts. This study paves the way for exploiting earth-abundant MgO in developing efficient catalysts and contributes to reducing H2 production costs.
AB - Herein, we report the use of a MgCeOx-supported Cu (MgCuCe) catalyst with a unique bead structure to augment the water-gas shift (WGS) reaction. The MgCuCe catalyst exhibited an exceptionally high reaction rate of 83 μmol g−1 s‒1 at 300 °C, compared with that without MgO (30 μmol g−1 s‒1). Very few studies have focused on MgO-supported catalysts owing to the reports on the inferior activity of MgO. However, this paper reports unprecedented enhancements by introducing MgO and illustrates the WGS reaction mechanism: (1) numerous defects promoted water dissociation and subsequent associative mechanism; (2) the labile oxygen in MgO participated in redox mechanisms. The hydrogen production cost realized due to the use of the MgCuCe was 0.63 USD/kg H2, which is lower than that achieved by using commercial and CeO2-supported catalysts. This study paves the way for exploiting earth-abundant MgO in developing efficient catalysts and contributes to reducing H2 production costs.
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U2 - 10.1016/j.apcatb.2020.119701
DO - 10.1016/j.apcatb.2020.119701
M3 - Article
AN - SCOPUS:85097142188
SN - 0926-3373
VL - 284
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
M1 - 119701
ER -
