Solvent-Free Ball-Milling-Derived Ni-CeO2/SiO2 Catalysts for CO2 Methanation DOI
Haoxin Liu, Yuqi Zhou, Hongjie Cui

et al.

Industrial & Engineering Chemistry Research, Journal Year: 2024, Volume and Issue: 63(23), P. 10172 - 10183

Published: May 29, 2024

The production of synthetic natural gas from captured CO2 and green H2 via methanation presents a compelling solution to long-term energy storage challenges the imperative mitigate emissions. In this study, we developed facile solvent-free ball-milling technique prepare CeO2-doped, SiO2-supported Ni-based catalysts for methanation. effects Ni loading (10–40 wt %), CeO2 content (0–10 citric acid/Ni molar ratio (0–1) on properties catalytic performance were extensively investigated. results demonstrate critical role particle size oxygen vacancy concentration in determining performance. general, smaller higher enhance conversion, although excessively small particles (≤3 nm) detrimentally impact CH4 selectivity by promoting reverse water shift reaction. optimal catalyst, synthesized with 0.15, contains 30 % 1 CeO2, exhibiting stable conversion (81%) (99%) over an 80-h time stream under reaction conditions 350 °C, H2/CO2 4, hourly space velocity 60 000 mL/(g·h). is environmentally benign, economically viable, readily scalable, offering promising avenue large-scale catalyst that essential practical application

Language: Английский

Engineering 3d-Printed Molybdenum Carbide Catalysts for Selective Co2 Reduction to Co DOI
Arturo Pajares, Mehmet Tanrıverdi, Eduardo Coutiño‐González

et al.

Published: Jan. 1, 2025

Language: Английский

Citations

0
CO2 Hydrogenation over Ni–Co/Ce0.6Zr0.4O2 Catalysts for Light Hydrocarbons under Mild Conditions DOI Creative Commons
V. Martínez-Jiménez, J. Gabriel Flores, Bettina Baumgartner

et al.

ACS Applied Engineering Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 17, 2025

Language: Английский

Citations

0
Comparative Study of Supported Ni and Co Catalysts Prepared Using the All-in-One Method in the Hydrogenation of CO2: Effects of Using (Poly)Vinyl Alcohol (PVA) as an Additive DOI Open Access

Luisa F. Navarrete,

María Atienza‐Martínez, Inés Reyero

et al.

Catalysts, Journal Year: 2024, Volume and Issue: 14(1), P. 47 - 47

Published: Jan. 10, 2024

Two series of Ni and Co catalysts supported onto La-Al2O3 were prepared the CO2 hydrogenation reactions investigated. The catalytic performance was evaluated in terms evolution with reaction temperature conversion product (CH4 CO) yields, as well specific activities (TOF) apparent activation energies. CH4 favored over both metals while TOF for formation about three times higher than at 240–265 °C. Metallic particle size effects found, decreasing mean metallic decreased. In contrast, CO tended to increase a smallest sizes. energies very similar significantly decreased values 73–79 kJ/mol when dispersion increased. using all-in-one method, resulting (poly)vinyl alcohol (PVA) being key additive that allowed us enhance give effective catalysts. This comparative study joins few existing ones literature which based on these operated under strictly same conditions.

Language: Английский

Citations

3
Key Role of Cations in Stabilizing Hydrogen Radicals for CO2-to-CO Conversion via a Reverse Water-Gas Shift Reaction DOI
Ruijuan Zhao, Lei Li, Qianbao Wu

et al.

The Journal of Physical Chemistry Letters, Journal Year: 2024, Volume and Issue: 15(7), P. 1914 - 1920

Published: Feb. 12, 2024

Electrochemically converting CO2 into valuable chemicals and fuels in acidic media is argued as a promising energy- carbon-efficient route. Although several key roles of alkali cations have been unveiled, the cation trends for reduction remain largely elusive. With decreasing size from Cs+ to Li+, here we show that apparent proton diffusion coefficient 3.0 M Li+ tens-fold lower than K+ electrolytes. has strongest inhibition ability transport, it acts worst both CO2-to-CO conversion partial current density on Au catalysts. Unexpectedly, with higher transport performs best conversion. We thus revisit find hydrated can stabilize hydrogen radicals benefiting at electrode interface while this not case. This study proposes cation-stabilized atomic assists activating via reverse water-gas shift route under electrochemical conditions.

Language: Английский

Citations

3
Solvent-Free Ball-Milling-Derived Ni-CeO2/SiO2 Catalysts for CO2 Methanation DOI
Haoxin Liu, Yuqi Zhou, Hongjie Cui

et al.

Industrial & Engineering Chemistry Research, Journal Year: 2024, Volume and Issue: 63(23), P. 10172 - 10183

Published: May 29, 2024

The production of synthetic natural gas from captured CO2 and green H2 via methanation presents a compelling solution to long-term energy storage challenges the imperative mitigate emissions. In this study, we developed facile solvent-free ball-milling technique prepare CeO2-doped, SiO2-supported Ni-based catalysts for methanation. effects Ni loading (10–40 wt %), CeO2 content (0–10 citric acid/Ni molar ratio (0–1) on properties catalytic performance were extensively investigated. results demonstrate critical role particle size oxygen vacancy concentration in determining performance. general, smaller higher enhance conversion, although excessively small particles (≤3 nm) detrimentally impact CH4 selectivity by promoting reverse water shift reaction. optimal catalyst, synthesized with 0.15, contains 30 % 1 CeO2, exhibiting stable conversion (81%) (99%) over an 80-h time stream under reaction conditions 350 °C, H2/CO2 4, hourly space velocity 60 000 mL/(g·h). is environmentally benign, economically viable, readily scalable, offering promising avenue large-scale catalyst that essential practical application

Language: Английский

Citations

3