Low‐Temperature Chemical Vapor Deposition Synthesis of Pt–Co Alloyed Nanoparticles with Enhanced Oxygen Reduction Reaction Catalysis

Abstract

Novel Pt-Co alloyed nanocatalysts are generated via chemical vapor deposition-assisted facile one-pot synthesis. The method guarantees highly monodisperse Pt-Co alloy nanoparticles with precise control of metallic compositions within 1 at%. A significant features is that a perfectly alloyed single-crystal structure is obtained at temperatures as low as 500 °C, which is much lower than conventional alloying temperatures.

Facile Fabrication of Platinum-Cobalt Alloy Nanoparticles with Enhanced Electrocatalytic Activity for a Methanol Oxidation Reaction

“…The alloying of Pt with Co can lead to a change of the electronic structure of Pt due to lattice strain and the charge transfer effect1640. To identify the electronic structure of Pt/CoPt-2/MWCNTs, the XPS spectra were obtained.…”

“…Impressively, the different electronegativity values (Pt is 2.28 and Co is 1.88) result in filling the Pt d-band and downshifting of d-band centre. Thereby, more active sites of the catalysts are exposed while weakening the binding of oxygenated species (-OH and -OOH) due to the electronic charge transfer from Co to Pt1314151617. Therefore, the catalytic performance of Pt-Co alloys are enhanced with their special synergistic effects.…”

“…Until now, various physical and chemical synthesis methods of Pt-based alloy NPs have been surveyed, including incipient wetness19, wet impregnation202122, the polyol method23242526, electrochemical deposition272829, the colloidal method303132, and chemical vapor deposition (CVD)163334. However, these methods are subject to intrinsic drawbacks, such as (a) complicated multistep processes, including mixing, precipitation, and cleaning; (b) catalyst poisoning by chemical residues and lack of a “clean” surface; (c) strict conditions required for alloying; and (d) high vacuum sputtering and advanced patterning equipment, similar to the CVD process.…”

Tuning Cobalt and Nitrogen Co‐Doped Carbon to Maximize Catalytic Sites on a Superabsorbent Resin for Efficient Oxygen Reduction

“…[4] In view of this, extensive research efforts have been carried out to overcome these problems, including the synthesis of noble-metal/transition-metal (such as Fe, Co, Cu, and Ni)a lloys with special structuralc ontrol [4a, 5] and entirely new non-noble-metal materials doped with the active elements, such as metal-free heteroatom-doped carbon materials, [1c, 6] transition-metal/nitrogen-doping carbon materials (M-N x -C), [7] transition-metal nitrides, [8] oxides, [9] and sulfides, [10] as well as their hybrids, [7b, 11] etc. [12] The major one is the thermal treatment strategy of precursors with the help of as ol-gel technique, [13] the template method, [14] and in situ synthesis [15] .T he second aspectf ocuseso nn ew strategies, involving chemical vapor deposition, [16] the wet-chemical strategy, [17] microwave methods, [18] etc. [12] The major one is the thermal treatment strategy of precursors with the help of as ol-gel technique, [13] the template method, [14] and in situ synthesis [15] .T he second aspectf ocuseso nn ew strategies, involving chemical vapor deposition, [16] the wet-chemical strategy, [17] microwave methods, [18] etc.…”

“…Generally,t here are as eries of techniques to preparet he above catalysts which are mainly divided into two aspects. [12] The major one is the thermal treatment strategy of precursors with the help of as ol-gel technique, [13] the template method, [14] and in situ synthesis [15] .T he second aspectf ocuseso nn ew strategies, involving chemical vapor deposition, [16] the wet-chemical strategy, [17] microwave methods, [18] etc. Among these new catalyst types, the M-N x -C (M = Fe and/or Co) catalysts are believed to be the most recentpromising candidates for cathode catalysts.…”