2021年10月18日 · We show that a 2D morphology of the PdO x phase synthesized with this approach is thermally stable and resistant to water poisoning, showing increased reactivity in methane oxidation.

2025年2月1日 · Here, we combined Pd ion titrations, X-ray absorption spectroscopy (XAS), and reaction kinetics measurements on a PdCu/Faujasite material (1 wt% Pd, 4 wt% Cu, Si/Al 2.6) to investigate how high-temperature air treatments impact the structure of Pd sites and their reactivity for Wacker oxidation of ethylene to acetaldehyde.

2019年1月28日 · In this study, two high-performance supported Pd nanoparticle catalysts (Pd/γ-Al 2 O 3 and Pd/zeolite-Y) are investigated for NH 3 -SCO using a combination of XAFS with DRIFTS and on-line mass...

2021年7月16日 · An oxidized Pd/Al 2 O 3 catalyst was reduced by using H 2-saturated cyclohexane at 70 °C, and reduction was followed in real time by attenuated total reflection infrared spectroscopy (ATR-IR), high-energy X-ray diffraction (XRD), and quick scanning X-ray absorption spectroscopy (XAS) to obtain the perspective from different materials ...

2024年5月1日 · In summary, the redox-driven surface generation of 2D metallic Pd bumps on litchi-like PdO surface was manifested to be highly active for the methane oxidation, according to the characterizations by HAADF-STEM, quasi in situ XPS, operando XAS, and DFT calculations.

2013年6月14日 · The PdO-Pd phase transformation in a 4 wt% Pd/Al2O3 catalyst has been investigated using in situ X-ray absorption spectroscopy (XAS) and in situ X-ray total scattering (also known as high-energy X-ray diffraction) techniques. Both the partial and total pair distribution functions (PDF) from these re …

2013年4月30日 · Synchronous XAS, DRIFTS and on-stream MS measurements under dynamic operando conditions permit elucidation of fundamental structure–reactivity relationships in the selective aerobic oxidation of crotyl alcohol over palladium catalysts.

2013年5月16日 · The PdO-Pd phase transformation in a 4 wt% Pd/Al2O3 catalyst has been investigated using in situ X-ray absorption spectroscopy (XAS) and in situ X-ray total scattering (also known as high-energy X-ray diffraction) techniques. Both the partial and total pair distribution functions (PDF) from these respective techniques have been analysed in depth.

The PdO–Pd phase transformation in a 4 wt% Pd/Al 2 O 3 catalyst has been investigated using in situ X-ray absorption spectroscopy (XAS) and in situ X-ray total scattering (also known as high-energy X-ray diffraction) techniques.

2022年3月14日 · Operando x-ray absorption spectroscopy (XAS) was used to monitor the evolution of Pd and Pt during poisoning and regeneration. The studies show the formation of PdS and metallic Pd during reactivation of Pd-Pt/Al2O3, followed by transition to PdO after changing to lean reaction gas mixt.