Insight into effect of acid/base nature of supports on selectivity of glycerol oxidation over supported Au-Pt bimetallic catalysts

Supported Cu catalysts for the hydrogenation of furfural in aqueous phase: effect of support

“…The vacancy of surface Al sites, Si sites, and Zn sites are the acid sites of Cu/Al 2 O 3 , Cu/SiO 2 , and Cu/ZnO, respectively, while the basic sites of Cu/Al 2 O 3 , Cu/SiO 2 , and Cu/ZnO are ascribed to surface oxygen vacancies. And the difference of surface conditions results in varied acid and base strength and amount of these three catalysts . Whereas Cu/MgO exhibits just basicity as the results show that two main peaks at 456 and 767 K on the CO 2 ‐TPD pattern attributing to the medium and strong basic sites respectively can be observed, and no peak is found on its NH 3 ‐TPD curve.…”

Green synthesis of Pt–Au dendrimer-like nanoparticles supported on polydopamine-functionalized graphene and their high performance toward 4- nitrophenol reduction

“…Then, the amine and catechol groups as preferential reactive sites were in electrostatic conjunction with PtCl 6 2− and AuCl Each Pt-Au-based sample exhibited four energy bands, which are assigned to metallic Pt 4f 7/2 , Pt 4f 5/2 , Au 4f 7/2 , and Pt 4f 5/2 , respectively. Furthermore, the Au 4f binding energies (BEs) shifted to a lower peak value for Pt-Au alloy nanoparticles, as 8 compared to monometallic Au nanoparticles. The same negative shifts also appeared in the Pt 4f regions for Pt-Au alloy nanoparticles as compared to monometallic Pt nanoparticles.…”

“…However, the incorporation of multiple metals, as compared to a single metal, into a single system is more advantageous for most applications, caused by a synergistic effect [6][7][8][9][10][11][12]. For example, platinum-gold nanoparticles have been used as catalysts for reactions such as NO reduction [6], CO oxidation [7], glycerol oxidation [8], and nitrophenol reduction [9][10][11][12][13][14].…”

Carbon supported Pt9Sn1 nanoparticles as an efficient nanocatalyst for glycerol oxidation

“…Generally, heterogeneous noble metal catalysts (i.e., Pt, Pd, and Au based catalysts) coupled with green oxidants such as oxygen are considered as a more sustainable system for glycerol oxidation [5][6][7][8][9][10][11][12]. For instance, activated carbon supported Pt catalyst (5%Pt/C) was reported to be very active for glycerol oxidation, with 55% yield of glyceric acid at 90% conversion (pH was adjusted to 7 by adding 30% NaOH solution).…”