Temperature-Programmed Desorption of Single Zeolite Nanoparticles DOI
Xuannuo Yi, Shasha Liu,

Taotao Zhao

et al.

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 20, 2024

Zeolites are essential solid acid catalysts in various chemical processes. Temperature-programmed desorption (TPD) is one of the most established techniques used to characterize acidity zeolites by measuring kinetics probes from bulk samples. However, conventional TPD can hardly deliver intrinsic properties because apparent inevitably mixed with mass transfer and thermal conduction due large sample amount (∼0.1 g). Herein, we developed an optical microscopy approach measure spectra single zeolite nanoparticles, termed oTPD, situ monitoring reduced scattering intensity individuals as a result probe molecules during heating. A significantly contributed oTPD spectrum, revealing temperature ∼300 °C lower than value also greatly narrowed peak width ∼150 ∼15 °C. Correlating micro-Raman very same further uncovered linear dependence between content silicon islands. This study provided unprecedented capabilities for implications better understanding structure–acidity relationship designing catalysts.

Language: Английский

Zeolite–Water Chemistry: Characterization Methods to Unveil Zeolite Structure DOI Open Access
José Almeida,

Lu Song,

Sohrab Askarli

et al.

Chemistry - Methods, Journal Year: 2025, Volume and Issue: unknown

Published: March 24, 2025

Abstract This review provides comprehensive aspects of the interaction water with zeolites, focusing on its influence structural and catalytic properties zeolites. It details how can alter zeolite acidity by forming hydrogen bonding or hydronium ions through different modes in topologies. Moreover, it summarizes risks stability loss via hydrolysis Si−O−T bonds to stability, structure, reactivity To address interference, various strategies for removal from frameworks are reviewed proposed perspective By combining advanced in‐situ techniques, FTIR solid‐state NMR have proven effective providing atomic‐level insights, as they eliminate masking effects enable precise characterization framework. work underscores importance these methods minimizing water, enhancing reliability applications, insights into recent advancements, challenges, future directions related fields.

Language: Английский

Citations

0
Fuel from air: NiO-CeO2 nanoparticles, MgO and beta zeolite dual function materials for direct CO2 capture and hydrogenation to CH4 DOI Creative Commons

Iván Martínez‐López,

Iris Martín‐García, Arantxa Davó‐Quiñonero

et al.

Fuel, Journal Year: 2025, Volume and Issue: 398, P. 135549 - 135549

Published: May 6, 2025

Language: Английский

Citations

0
Temperature-Programmed Desorption of Single Zeolite Nanoparticles DOI
Xuannuo Yi, Shasha Liu,

Taotao Zhao

et al.

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 20, 2024

Zeolites are essential solid acid catalysts in various chemical processes. Temperature-programmed desorption (TPD) is one of the most established techniques used to characterize acidity zeolites by measuring kinetics probes from bulk samples. However, conventional TPD can hardly deliver intrinsic properties because apparent inevitably mixed with mass transfer and thermal conduction due large sample amount (∼0.1 g). Herein, we developed an optical microscopy approach measure spectra single zeolite nanoparticles, termed oTPD, situ monitoring reduced scattering intensity individuals as a result probe molecules during heating. A significantly contributed oTPD spectrum, revealing temperature ∼300 °C lower than value also greatly narrowed peak width ∼150 ∼15 °C. Correlating micro-Raman very same further uncovered linear dependence between content silicon islands. This study provided unprecedented capabilities for implications better understanding structure–acidity relationship designing catalysts.

Language: Английский

Citations

0