Bimetallic Platinum‐Tin Nanoparticles on Hydrogenated Molybdenum Oxide for the Selective Hydrogenation of Functionalized Nitroarenes

Abstract

What was the inspiration for this cover design?Functionalized nitroarene hydrogenation with satisfactory activity and selectivity is accomplished through incorporation of bimetallic Pt-Sn catalysts on hydrogenated MoO x (H-MoO x ) supports. The metal-support interactions contributetothe efficient turnover and the atom-rearranged bimetallic Pt-Sn surface promotes the selectivity.T his mechanism inspires the cover design, in which af ast car drives in the right direction with metersi ndicating that the hydrogenation reactioni sa ccelerateda nd directed by Pt-Sn/H-MoO x .

Three‐Dimensionally Hierarchical Pt/C Nanocomposite with Ultra‐High Dispersion of Pt Nanoparticles as a Highly Efficient Catalyst for Chemoselective Cinnamaldehyde Hydrogenation

“…[62] This difference in the selectivity was explained in terms of the formation of effective metal-support active centers, which provided strong acceptors ites for C=O [63] crotonaldehyde towards crotyl alcohol, [64] and 4-nitrostyrolene towards 4-vinylaniline. [65] With similar particle size and metal loading, they attributed the pronounced enhancementso nboth hydrogenation activity and selectivity of catalysts to the strongm etal-supporti nteraction, during which the reported novel supports (H-MoO x and Mo 2 C) could donate (or gain) electrons to (or from) the active metal, thereby giving rise to superiorc atalytic performance. In our case, the formation of Pt nanoparticles also originates from thermal reduction with the carbon itself as the reducing agent,t ogether with the formation of the three-dimensionally hierarchical porous structure.…”

Hydrogen Doping into MoO3 Supports toward Modulated Metal–Support Interactions and Efficient Furfural Hydrogenation on Iridium Nanocatalysts

“…TEM observation further confirmed the good dispersity of the Ir NPs on H−MoO x with an average size of (2.0±0.1) nm (Figure a‐2–e‐2). Such negligible variation in size with increasing temperature should be ascribed to the strong metal–support interactions on H−MoO x . The observed lattice of 0.22 nm in the high‐resolution TEM (HR‐TEM) images (Figures a‐3–e‐3) can be indexed to Ir(111).…”

“…To achieve efficient catalysis on defined surface/interfaces, controlled H doping into metal oxide supports is highly desirable, although it is difficult by means of direct H 2 treatment. Very recently, hydrogen spillover on metals has been demonstrated to be feasible in hydrogenating metal oxide supports in situ, whereby the H doping can be easily controlled by simply varying the temperature during reduction . The simultaneous generation of active metal sites along with H doping into supports will ensure strong interactions between the ultrafine metal and a fresh H−MO x surface.…”

“…[15][16][17] Our recent work also discovered that the strong electronic metal-support interactions that arise from HÀMoO x can alter the surfacec harge state of metals( e.g.,P t, PtÀSn, Ir)a nd contributet ot he selectiveh ydrogenation of functionalized nitroarenes and a,b-unsaturated aldehydes. [18,19] To achieve efficient catalysis on defined surface/interfaces, controlled Hd oping into metal oxide supports is highly desirable, although it is difficult by means of direct H 2 treatment. Very recently,h ydrogen spillover on metalsh as been demonstrated to be feasible in hydrogenating metal oxide supports in situ, whereby the Hd oping can be easily controlled by simply varying the temperature during reduction.…”

“…Very recently,h ydrogen spillover on metalsh as been demonstrated to be feasible in hydrogenating metal oxide supports in situ, whereby the Hd oping can be easily controlled by simply varying the temperature during reduction. [18,20] The simultaneous generation of active metal sites alongw ith Hd opingi nto supports will ensure strong interactions between the ultrafine metal and af resh HÀMO x surface.…”