Frustrated Lewis Pairs Boosting CO₂ Capture and In Situ Methanation over Ni/CaO Dual-Functional Materials

ACS Sustainable Chemistry & Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: March 14, 2025

In this study, a Ni/CaO dual-functional material with frustrated Lewis pair (FLP) structure was synthesized through the codoping of Al and Zr for integrated CO2 capture methanation applications. The formation FLPs confirmed using CO2-TPD, EPR, NH3-TPD, which showed enhanced acid–base properties due to creation oxygen vacancies (acting as bases) introduction Zr4+ acid). This unique environment facilitated efficient activation proton transfer. situ diffuse reflectance infrared Fourier transform spectroscopy identified key intermediates such CO*, indicating that in follows dissociation path. DFT calculations demonstrated FLP lowers energy barrier COOH* CO* conversion, while accelerated C–H bond formation. Compared pristine without structures, Ni10Ca80Al5Zr5 structures exhibits significant enhancement performance, adsorption capacity increasing from 9.89 12.51 mmol/g CH4 yield rising 3.68 7.46 mmol/g. Over 20 cycles, conversion rate selectivity only slightly decreased by 0.45 4.6%, respectively. 9.35 first 15 cycles then remained stable. study demonstrates improves cyclic stability activity materials.

Language: Английский

Decoding fundamental insights and outlooks on state-of-the-art iron-catalyst design strategies for meliorated CO2 valorization into light olefins

Coordination Chemistry Reviews, Journal Year: 2025, Volume and Issue: 535, P. 216611 - 216611

Published: March 18, 2025

Language: Английский

Synergistic Regulation of Rare Earth and Noble Metal Promoters on Ni-based Bifunctional Materials for Enhanced CO2 Methanation Performance and Reaction Mechanism

Catalysis Letters, Journal Year: 2025, Volume and Issue: 155(5)

Published: April 9, 2025

Language: Английский