A High Pressure Operando Spectroscopy Examination of Bimetal Interactions in 'Metal Efficient' Palladium/In2 O3 /Al2 O3 Catalysts for CO2 Hydrogenation.

CO2 hydrogenation to methanol has the potential to serve as a sustainable route to a wide variety of hydrocarbons, fuels and plastics in the quest for net zero. Synergistic Pd/In2 O3 (Palldium on Indium Oxide) catalysts show high CO2 conversion and methanol selectivity, enhancing methanol yield. The identity of the optimal active site for this reaction is unclear, either as a Pd-In alloy, proximate metals, or distinct sites. In this work, we demonstrate that metal-efficient Pd/In2 O3 species dispersed on Al2 O3 can match the performance of pure Pd/In2 O3 systems. Further, we follow the evolution of both Pd and In sites, and surface species, under operando reaction conditions using X-ray Absorption Spectroscpy (XAS) and infrared (IR) spectroscopy. In doing so, we can determine both the nature of the active sites and the influence on the catalytic mechanism.

[Relevant trauma in a haemodynamic stable patient should be computed tomographed in spite of pregnancy]. / Relevant traume hos en hæmodynamisk stabil patient bør efterfølges af computertomografi trods graviditet.

A 37 year-old pregnant woman, gestational age 32 weeks, was involved in a motor vehicle accident. Abdominal ultrasound revealed no pathological findings, and the woman was discharged after 24 hours of observation. Three weeks later a healthy girl was delivered by emergency caesarean section due to placental abruption. During surgery a large amount of blood was detected and signs of previous trauma and haematoma to the spleen were revealed. Post-operative abdominal computed tomography scan was performed, revealing a 5 × 7 cm intrasplenic haematoma.