Revisiting magnesium oxide to boost hydrogen production via water-gas shift reaction: Mechanistic study to economic evaluation

Seongmin Jin; Yongha Park; Gina Bang; Nguyen Dat Vo; Chang Ha Lee

doi:10.1016/j.apcatb.2020.119701

Revisiting magnesium oxide to boost hydrogen production via water-gas shift reaction: Mechanistic study to economic evaluation

Seongmin Jin, Yongha Park, Gina Bang, Nguyen Dat Vo, Chang Ha Lee

Department of Chemical and Biomolecular Engineering

Research output: Contribution to journal › Article › peer-review

15 Citations (Scopus)

Abstract

Herein, we report the use of a MgCeO_x-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.

Original language	English
Article number	119701
Journal	Applied Catalysis B: Environmental
Volume	284
DOIs	https://doi.org/10.1016/j.apcatb.2020.119701
Publication status	Published - 2021 May 5

Bibliographical note

Funding Information:
This research was supported by the National Research Foundation of Korea (NRF), funded by the Ministry of Science and ICT (2019K1A4A7A03113187). We acknowledge Dr. Chang Won Yoon of KIST for assistance with the in situ DRIFTS analyses.

Funding Information:
This research was supported by the National Research Foundation of Korea (NRF) , funded by the Ministry of Science and ICT ( 2019K1A4A7A03113187 ). We acknowledge Dr. Chang Won Yoon of KIST for assistance with the in situ DRIFTS analyses.

Publisher Copyright:
© 2020 Elsevier B.V.

All Science Journal Classification (ASJC) codes

Catalysis
Environmental Science(all)
Process Chemistry and Technology

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title = "Revisiting magnesium oxide to boost hydrogen production via water-gas shift reaction: Mechanistic study to economic evaluation",

abstract = "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.",

author = "Seongmin Jin and Yongha Park and Gina Bang and Vo, {Nguyen Dat} and Lee, {Chang Ha}",

note = "Funding Information: This research was supported by the National Research Foundation of Korea (NRF), funded by the Ministry of Science and ICT (2019K1A4A7A03113187). We acknowledge Dr. Chang Won Yoon of KIST for assistance with the in situ DRIFTS analyses. Funding Information: This research was supported by the National Research Foundation of Korea (NRF) , funded by the Ministry of Science and ICT ( 2019K1A4A7A03113187 ). We acknowledge Dr. Chang Won Yoon of KIST for assistance with the in situ DRIFTS analyses. Publisher Copyright: {\textcopyright} 2020 Elsevier B.V.",

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AU - Vo, Nguyen Dat

AU - Lee, Chang Ha

N1 - Funding Information: This research was supported by the National Research Foundation of Korea (NRF), funded by the Ministry of Science and ICT (2019K1A4A7A03113187). We acknowledge Dr. Chang Won Yoon of KIST for assistance with the in situ DRIFTS analyses. Funding Information: This research was supported by the National Research Foundation of Korea (NRF) , funded by the Ministry of Science and ICT ( 2019K1A4A7A03113187 ). We acknowledge Dr. Chang Won Yoon of KIST for assistance with the in situ DRIFTS analyses. 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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Revisiting magnesium oxide to boost hydrogen production via water-gas shift reaction: Mechanistic study to economic evaluation

Abstract

Bibliographical note

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