Comparative study of catalytic activity of Pd loaded hydroxyapatite and fluoroapatite in butan-2-ol conversion and methane oxidation

Hydroxyapatite gel for the improved removal of Pb2+ ions from aqueous solution

“…This could be due to evaporation of P 2 O 5 . This is of interest, for further study, to understand the thermal behavior of lead-doped Ca-HA, since it is used in high temperature processes, for example in the catalytic reforming of refractory molecules such as methane and butan-1-ol [25,[30][31][32].…”

The role of m-ZrO2 in the selective oxidation of ethanol to acetic acid employing PdO/m-ZrO2

“…According to Boukha et al [25], the absorptions around 360 nm can be attributed to the d-d transition band of Pd from PdO. Both spectra also show shoulders at around 450 nm, which can be ascribed to PdO 2 or large PdO particles [26].…”

“…The PdO/ZrO 2 catalyst also depicts a band at 250 nm, which might be assigned to dispersed Pd species having strong interactions with the support. This absorption is related to the charge transfer from the oxygen of the support to the d orbitals of Pd [25][26][27].…”

Influence of the metal/metal oxide redox cycle on the catalytic activity of methane oxidation over Pd and Ni doped hydroxyapatite

“…To synthesise mesoporous HAP different soft-templates were employed, such as polyoxyethylene (20) sorbitan monostearate (Tween 60, 26 g), nonaoxyethylene dodecyl ether (C 12 EO 9, 10.66g), or a mixture of Tween 60 and C 12 EO 9 and a hard-template (carbon nanorods), synthesised following the same procedure as reported in our previous study. [16] For soft templates, Ca(NO 3 ) 2 (7.88 g) was mixed with KH 2 PO 4 (2.72 g), dissolved in water (26.60 mL) and acidified by concentrated HNO 3 (13.60 mL).…”