Preparation of free-standing mesoporous metal catalysts and their applications in heterogeneous enantioselective hydrogenations

Abstract

This review presents the recent progress made in the preparation of free-standing mesoporous metals and their applications in heterogeneous enantioselective hydrogenations.

Size-dependent synthesis and catalytic activities of trimetallic PdAgCu mesoporous nanospheres in ethanol electrooxidation

“…[1][2][3][4][5][6][7] Among the multiple nanostructures of nanocrystals, mesoporous nanospheres (MNSs) with three-dimensional (3D) interconnected nanochannels have received special attention in (electro)catalysis, owing to their abundant edge/corner sites, accessible mesopores, and high surface area. [8][9][10][11][12][13][14][15] Furthermore, noble metal MNSs with cylindrically open nanochannels and sub-100 nm sizes would further enlarge the accessibility to the reactants, facilitate reactant/product transfer, accelerate the reaction kinetics, and thus enhance the (electro)catalytic performance. [16][17][18][19][20] During the past few decades, dozens of synthetic methods and techniques, including the hardtemplating method, [21][22][23] so-templating method, 14,[24][25][26][27] and solution-phase approach, 28,29 have been employed to fabricate various nanosized MNSs with monometallic or multimetallic compositions.…”

STM Study of Ketopantolactone/(R)-1-(1-Naphthyl)ethylamine Complexes on Pt(111): Comparison of Prochiral and Enantiomeric Ratios and Examination of the Contribution of CH···OC Bonding

“…If the agreement is not simply coincidental, then this suggests that the enantioselective hydrogenation occurs under thermodynamic control, with the result that the er reflects the pr. Bürgi and Baiker , and He and co-workers , have pointed out cases where the pr, as predicted by calculations of the relative stabilities of pro- R and pro- S modifier–substrate complexes, is in good agreement with the measured er. While the present study provides indirect experimental evidence for such a correlation in the case of KPL/( R )-NEA, it should be kept in mind that the measured pr results from the summation of multiple states (Figure ), whereas the cited calculations − consider two prochiral states.…”

Chemical Design of Palladium‐Based Nanoarchitectures for Catalytic Applications

“…Moreover, the desired lattice structure formed by the KBH 4 reduction provided the appropriate microenvironment for improving the enantiodifferentiation. Hence, the enantioselectivity could be tuned by manipulating the confinement effect in the catalyst structure …”