Highly open rhombic dodecahedral PtCu nanoframes

Abstract

Herein, we report a facile strategy that allows one-pot preparation of highly open rhombic dodecahedral PtCu alloy nanoframes. Due to the highly open structures, the PtCu nanoframes exhibit enhanced catalytic performance in methanol electrooxidation, showing a new strategy to create highly active catalysts.

Recent Progress in Well‐Controlled Synthesis of Ceria‐Based Nanocatalysts towards Enhanced Catalytic Performance

“…[ 189 ] Shido and Iwasawa concluded that the intermediate for the WGS was a bidentate formate, formed by the reaction of CO with terminal hydroxyl groups on CeO 2 , and that the subsequential decomposition of the bidentate formate to a unidentate carbonate and H 2 is considered as the rate determining step. [ 190 ] However, the variable mechanisms are strongly dependent on the choice of experimentations, thus the dominant mechanism and surface intermediate should be in association with the experimental conditions for a specifi c catalyst. Therefore, Burch put forward a universal mechanism for the forward and reverse WGS reactions shown in Figure 41 to rationalize the apparent discrepancies between different models.…”

Shape-controlled synthesis of porous AuPt nanoparticles and their superior electrocatalytic activity for oxygen reduction reaction

“…To date, various bimetallic PtM materials with different structures and compositions have been demonstrated. For instance, PtPd nanoicosahedrons [13], hollow PtPd nanoparticles [14], rhombic dodecahedral PtCu nanoframes [15], Au@Porous Pt yolk-shell nanoparticles [16], PtPd nanodendrites [17] and AuPt alloyed flowerlike - assembly nanochains [18] have been obtained by different synthetic routes. Generally, control of shapes, composition and surface structures of the nanoparticles can help improve materials’ catalytic properties [19–21].…”

Noble Metal-Based Nanocomposites for Fuel Cells

“…Dendrite and branch structures not only exhibit large surface area and high active sites, but also significantly relieve the aggregation happened in electrocatalytic stability test [9,33,34]. Highly open noble metal nanocages and nanoframes exhibit enhanced electrocatalytic properties due to their three-dimensional accessible surface atoms [20,35,36]. A nanosegregated noble metal skin on these open structures can further improve the catalytic performance [18,37].…”

“…In the past decade, various experimental methods have been developed to synthesize sizedependent, high catalytic performance noble metal-based nanocomposites with diverse morphologies, such as polyhedron, concave, wire, plate, belt/ribbon, dendrite/branch and cage/frame structures [9][10][11][12][13][14][15][16][17][18][19][20][21]. Smaller size means higher surface-area-to-volume ratio, higher atomic utilization efficiency and more catalytic active sites.…”