Gallium-Mediated Switch in Product Selectivity for Co2 Hydrogenation Over Ni/Ceo2 Catalysts DOI

Changxuan Zhang,

Zhourong Xiao, Hui Zhang

et al.

Published: Jan. 1, 2024

Achieving high activities and selectivity for the reverse water-gas shift (RWGS) reaction at low-temperatures continues to pose a significant challenge. Ni-based catalysts have been widely employed in CO2 hydrogenation due their strong capacity dissociate H2, but they exhibit low CO. Herein, we successfully altered product via controlling distribution of Ga species on Ni/CeO2 catalysts. When was combined with Ni form spinel NiGa2O4 (NiGa2O4/CeO2), main While, doped into CeO2 support (Ni/Ga4-CeO2), CH4. The supported exhibited excellent performance RWGS reaction, CO over 99%, production rate as 74.5 mmol/gcat·h 450 oC 24000 mL/gcat·h, without any loss activity after 72 h. Ni/Ga4-CeO2, containing metallic abundant oxygen vacancies, enhanced methanation process, conversion 81.38%, CH4 136 mmol/gcat·h. CO-TPD analysis revealed that NiGa2O4/CeO2 catalyst weak adsorption CO*, which played key role enhancing towards Subsequent in-situ DRIFTS further confirmed differences obtained from NiGa4/CeO2 Ni/Ga4-CeO2 were formation different intermediate surface, leading change products. This study provides new idea switch reduction by species.

Language: Английский

Support effect on Ni-based mono- and bimetallic catalysts in CO2 hydrogenation DOI Creative Commons
Jihao Wang, Shilong Chen, Pierfrancesco Ticali

et al.

Nanoscale, Journal Year: 2024, Volume and Issue: 16(37), P. 17378 - 17392

Published: Jan. 1, 2024

Zirconia- and ceria-supported Ni,Fe catalysts show higher activity than MgO-supported in CO 2 hydrogenation. This effect is due to differences reducibility oxygen vacancy formation resulting modified metal-support interactions.

Language: Английский

Citations

3
Gallium-Mediated switching in product selectivity for CO2 hydrogenation over Ni/CeO2 catalysts DOI

Changxuan Zhang,

Zhourong Xiao, Hui Zhang

et al.

Separation and Purification Technology, Journal Year: 2024, Volume and Issue: 358, P. 130388 - 130388

Published: Nov. 4, 2024

Language: Английский

Citations

3
Gallium-Mediated Switch in Product Selectivity for Co2 Hydrogenation Over Ni/Ceo2 Catalysts DOI

Changxuan Zhang,

Zhourong Xiao, Hui Zhang

et al.

Published: Jan. 1, 2024

Achieving high activities and selectivity for the reverse water-gas shift (RWGS) reaction at low-temperatures continues to pose a significant challenge. Ni-based catalysts have been widely employed in CO2 hydrogenation due their strong capacity dissociate H2, but they exhibit low CO. Herein, we successfully altered product via controlling distribution of Ga species on Ni/CeO2 catalysts. When was combined with Ni form spinel NiGa2O4 (NiGa2O4/CeO2), main While, doped into CeO2 support (Ni/Ga4-CeO2), CH4. The supported exhibited excellent performance RWGS reaction, CO over 99%, production rate as 74.5 mmol/gcat·h 450 oC 24000 mL/gcat·h, without any loss activity after 72 h. Ni/Ga4-CeO2, containing metallic abundant oxygen vacancies, enhanced methanation process, conversion 81.38%, CH4 136 mmol/gcat·h. CO-TPD analysis revealed that NiGa2O4/CeO2 catalyst weak adsorption CO*, which played key role enhancing towards Subsequent in-situ DRIFTS further confirmed differences obtained from NiGa4/CeO2 Ni/Ga4-CeO2 were formation different intermediate surface, leading change products. This study provides new idea switch reduction by species.

Language: Английский

Citations

0