Uncovering the Origin of Light‐Promoted Synergetic Effect and Y Doping in Enhancing Photothermocatalytic Dry Reforming of Methane on Ni/Ni‐Y₂‐Al₂O₃

Solar RRL, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 31, 2025

Photothermocatalytic dry reforming of methane (DRM) can convert CH 4 and CO 2 into syngas, offering an effective approach to reducing greenhouse gas emissions. However, photothermocatalytic DRM reaction generally needs a high light intensity surpassing 192 kW m −2 attain light‐fuel conversion. Also, catalysts applied are liable inactivation due carbon deposition. Herein, nanocomposite Ni nanoparticles supported on Ni‐ Y‐doped Al O 3 (Ni/Ni‐Y ‐Al ) is prepared. It achieves H production rates with light‐to‐fuel efficiency (29.2%) at lower (80.1 ). Meanwhile, it sustains excellent durability accomplishes 37‐fold reduction in deposition rate compared Ni/Al . The substantially enhanced catalytic activity resistance Ni/Ni‐Y correlated accelerating species (C*) oxidation (the rate‐determining steps DRM). This acceleration derives from the synergetic effect carbonate resulting Y doping, which participate C* via two separate pathways. When light, further facilitates oxidation. Simultaneously, immensely reduces activation energy, activates NiO bonds interface region, expedites between interface, enhancing resistance.

Language: Английский

Insights into the Light‐Promoted Synergy Among Active Oxygen, Oxygen Vacancies, and H₂O Adsorption Sites in Ni/La³⁺‐Doped CeO₂ for Highly Efficient Photothermocatalytic Cellulose Steam Reforming to Syngas

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 17, 2025

Abstract Photothermocatalytic cellulose steam reforming has emerged as a sustainable strategy in balancing energy conservation and efficiency; the paramount stumbling block its industrial application is excessive byproducts rapid deactivation due to vigorous reaction. This study substantiates how doping La 3+ ceria loaded with nickel nanoparticles maximizes role of interfacial sites intrinsic active centers, overcoming this production sensitivity. The optimized H 2 CO rates (4845.9 2778.5 mmol g −1 catalyst h ) are achieved by modulating molar ratio Ce 3:1 (Ni/Ce 3 1 catalyst). Comprehensive characterizations provide insight into unique synergy between Ni ‐doped CeO lattice oxygen activation enhanced water adsorption capacity increasing vacancies doping, which responsible for tar conversion ‐rich syngas two distinct pathways. Additionally, significant photoactivation found accelerate migration from both adsorbed on vacancies, particularly promoting oxidation syngas. findings pose promising approach achieving antideactivation high light‐to‐fuel efficiency photothermocatalytic reforming.

Language: Английский

Atomically Dispersed Rh–O–V Pairs Promote Methane Dry Reforming with Sustained Catalytic Activity

ACS Catalysis, Journal Year: 2025, Volume and Issue: unknown, P. 8833 - 8845

Published: May 11, 2025

Language: Английский