Pt₃Co Concave Nanocubes: Synthesis, Formation Understanding, and Enhanced Catalytic Activity toward Hydrogenation of Styrene

Abstract

We report a facile synthesis route to prepare high-quality Pt3Co nanocubes with a concave structure, and further demonstrate that these concave Pt3Co nanocubes are terminated with high-index crystal facets. The success of this preparation is highly dependent on an appropriate nucleation process with a successively anisotropic overgrowth and a preservation of the resultant high-index planes by control binding of oleyl-amine/oleic acid with a fine-tuned composition. Using a hydrogenation of styrene as a model reaction, these Pt3Co concave nanocubes as a new class of nanocatalysts with more open structure and active atomic sites located on their high-index crystallographic planes exhibit an enhanced catalytic activity in comparison with low-indexed surface terminated Pt3Co nanocubes in similar size.

Trimetallic TriStar Nanostructures: Tuning Electronic and Surface Structures for Enhanced Electrocatalytic Hydrogen Evolution

“…The trimetallic PtFeCo NP sample is synthesized via an organic-phase process, in which platinum (II) acetylacetonate (Pt(acac) 2 ), iron (III) nitrate (Fe(NO 3 ) 3 ), and cobalt (II) acetylacetonate (Co(acac) 2 ) in 1-octadecene (ODE) are co-reduced by 1,2-tetradecanediol (TDD) in the presence of oleylamine (OLA), oleic acid (OA), and 1-dodecanethiol (DDT). Specifi cally, the OLA and OA serve as stabilizing agents whose ratio determines nucleation and growth rates, [ 21 ] while the DDT is utilized as a coordination chemical to balance the reduction rates of Pt, Fe, and Co precursors. [22][23][24] The PtFe NP and PtCo NP are prepared as reference samples by following the established protocols in the literature.…”

Noble metal alloy complex nanostructures: controllable synthesis and their electrochemical property

“…For instance, Fang et al 71 synthesized concave Pt 3 Co nanocubes with HIFs. Thus, the selection of an appropriate capping agent with selective binding ability is important to get the alloy concave structures with desired facets.…”

ChemInform Abstract: Recent Advances in the Synthesis and Electrocatalytic Applications of Platinum‐Based Bimetallic Alloy Nanostructures

“…PtCo alloy nanocrystals with varying structures are summarized in Ta ble 4. [118][119][120][121][122][123][124][125][126] PtCo alloy nanowires ( Figure 4A)w ere prepared by the solvothermal treatment of am ixture of ethylenediamine, Pt(acac) 2 ,a nd Co(acac) 2 . [118] Initially, the formation of thin platelike nanostructures composed of many adjacent PtCo alloy sheets (< 10 nm thick) was observed.…”