Enhancement of the phase stability in ZnGa2O3.994Se0.006: Li+, Mn2+ phosphors

Radio-frequency H2 plasma treatment of AuPd/TiO2 catalyst for selective hydrogenation of acetylene in excess ethylene

“…7) after 24-h reaction. A study of the chemical nature of these carbonaceous deposits is beyond the scope of this work; however, some interpretations of the structure of these carbon materials are available in literature [3,38]. The peak at ∼257 • C (Peak I) can be attributed to the combustion of unstructured carbon or trapped hydrocarbons on the catalyst surface or absorbed in catalyst pores.…”

Partial hydrogenation of 1,3-cyclooctadiene catalyzed by palladium-complex catalysts immobilized on silica

“…On the basis of the peak positions, the peak I may be considered to represent the loss of AP groups electronically influenced by neighboring palladium metals while the peak II represents the loss of AP groups directly bound to Pd. On the other hand, these peaks are observed at lower temperatures than those for Pd(APSi) 2 /SiO 2 sample, and this suggests that electron-donating tmeda ligand makes the bond between AP groups and Pd weak [24][25][26]. In comparison to the differential TG curve of APSi/SiO 2 , the peak III of (tmeda)Pd(APSi) 2 /SiO 2 sample may be attributed to the loss of aminopropyl groups and amine of tmeda that are not bound to Pd.…”

Effect of potassium addition on the properties of a TiO2-modified Pd catalyst for the selective hydrogenation of acetylene

“…Acetylene impurities in the ethylene stream are usually removed by selective hydrogenation over Pd-based catalysts [1]. Various additives have been proposed for improving ethylene selectivity [2][3][4][5][6][7][8][9][10][11][12][13].…”