Mesoporous CeO₂-supported ultrafine PdCu nanoparticle catalyst for selective hydrogenation of alkynols

Abstract

Selective hydrogenation of alkynols compounds to produce high value-added enols is an important reaction in the fine chemical industry. The construction of selective hydrogenation catalysts for alkynols is challenging because...

Selective oxidation of alkenes catalyzed by palladium-based bimetallic heterogeneous catalysts under atmospheric pressure

“…3(a), the binding energy of Cu is slightly shifted towards a lower energy after the addition of Pd, indicating a possible electron transfer between Pd and Cu. 42 Additionally, it is noticeable that the satellite peak of Cu 2+ at 943 eV weakens with the inclusion of Pd. This suggests that the presence of Pd may facilitate the conversion of Cu 2+ to Cu 0 and Cu + .…”

“…The presence of Pd 2+ may be attributed to incomplete reduction of PdO and partial oxidation of Pd 0 in the air. 42 Additionally, it was discovered that the Pd3d binding energy of Pd–Cu/γ-Al 2 O 3 is shifted by 0.3 eV towards a higher binding energy compared to Pd/γ-Al 2 O 3 . This suggests that the addition of copper may have strengthened the electronic interactions between the Pd atoms and the support, leading to a decrease in the density of the palladium electron cloud and a subsequent shift to higher binding energy positions, favoring the binding of Pd with electron-rich CC double bonds.…”