Synthesis of Ultrathin FePtPd Nanowires and Their Use as Catalysts for Methanol Oxidation Reaction

Guo, Shaojun; Zhang, Sen; Sun, Xiaolian; Sun, Shouheng

doi:10.1021/ja207308b

Cited by 306 publications

(208 citation statements)

References 22 publications

Supporting

Mentioning

202

Contrasting

Order By: Relevance

“…NWs reveal the small dimension of the chemically disordered fcc crystal domains. [14] The as-synthesized FePt and CoPt NWs were studied as catalysts in the ORR. To perform the tests, the NWs were first deposited on a carbon (C) support (Ketjen EC-300J) by sonicating the mixture of NWs and C (NW/C = 4:6 by weight) in hexane/acetone (v/v = 2:1) and then washed with acetic acid (99 %) at 70 8C to remove the surfactant.…”

mentioning

confidence: 99%

FePt and CoPt Nanowires as Efficient Catalysts for the Oxygen Reduction Reaction

Guo

Zhu

et al. 2013

Angewandte Chemie

Self Cite

View full text Add to dashboard Cite

The oxygen reduction reaction (ORR) is an important cathode reaction used in fuel cells and metal-air batteries for renewable energy applications. [1][2][3] Platinum has been studied extensively as an essential catalytic component to reduce undesired overpotentials observed in the ORR. [4] Previous computational and experimental investigations have revealed that once alloyed with first-row transition metals, such as Fe, Co, and Ni, Pt alloy thin films and nanoparticles (NPs) can show dramatic activity enhancement in ORR catalysis, [5,6] especially when the Pt-skin structure is formed on the surface of MPt. [7] This enhancement is believed to originate from the downshift of the d-band center of Pt in the alloy structure; this downshift results in a decrease of the bonding strength between Pt and the oxygenated species (often called blocking species or spectators) and an increased number of available Pt sites for oxygen adsorption.[5] Recent experiments also indicate that elongated Pt nanostructures are less subject to dissolution, Ostwald ripening, and aggregation than the Pt NPs in acidic conditions, [8][9][10][11] and that they may be robust for catalyzing the ORR with high activity and durability.Herein, we report an advanced organic-phase synthesis of thin FePt and CoPt alloy nanowires (NWs) for enhanced catalysis of the ORR. Different from the previous approach to FePt NPs [12] and FePt NWs, [13] the current synthesis through decomposition of metal pentacarbonyl and reduction of platinum acetylacetonate, [Pt(acac) 2 ], was performed in sodium oleate solution of 1-octadecene (ODE) and oleylamine (OAm). Depending on the metal carbonyl used, FePt or CoPt NWs were obtained at a high synthetic yield and with the desired control over alloy composition. Electrochemical studies showed that these NWs were active catalysts for the ORR. The specific activity and the mass activity of the 2.5 nm wide FePt NWs reached 1.53 mA cm À2 and 844 mA mg À1 Pt at 0.9 V (vs. reversible hydrogen electrode, RHE; 0.2 mA cm À2 and 110 mA mg À1 Pt at 0.95 V), while those of the benchmark Pt catalyst reached 0.32 mA cm À2 and 155 mA mg À1 Pt at 0.9 V (0.080 mA cm À2 and 35 mA mg À1 Pt at 0.95 V). The annealed 6.3 nm wide FePt NWs showed an even higher specific activity of 3.9 mA cm À2 at 0.9 V and 0.46 mA cm À2 at 0.95 V.

show abstract

mentioning

confidence: 99%

FePt and CoPt Nanowires as Efficient Catalysts for the Oxygen Reduction Reaction

Guo

Zhu

et al. 2013

Angewandte Chemie

Self Cite

View full text Add to dashboard Cite

show abstract

“…Two-dimensional (2D) nanowire (NW) and nanorod materials have received increasing attention as electrocatalysts in fuel cells, such as PtPd [94], FePt [95], FePtPd [96], Pd/FePt [97], CoPt [95], AuPtPd [77], and PdAg [98], for ORR [95], ethanol oxidation reaction (EOR) [77], and FAOR [98] processes. The successful synthesis of branched platinum nanowires supported on rGO (BPtNW/rGO) was demonstrated through a facile one-step wet chemical reduction approach by using HCOOH as reducing agent without adding any surfactant [30].…”

Section: Graphene-supported Nanowires and Nanorodsmentioning

confidence: 99%

Graphene‐Supported Metal Nanostructures with Controllable Size and Shape as Advanced Electrocatalysts for Fuel Cells

Liu

Chen

2015

Graphene‐based Energy Devices

View full text Add to dashboard Cite

IntroductionBecause of the dramatically increasing energy consumption, fossil fuel depletions, limited supply of these natural resources, and environmental pollution all over the world [1,2], intense efforts are being made by many researchers to find clean, environmentally friendly, renewable, and sustainable energy storage systems, including batteries, diesel/generator units, supercapacitors, and fuel cells, among others [3,4]. Of these energy devices, fuel cells (FCs) are expected to become a potential energy source with the advantages of abundance and nontoxicity of the small organic molecular fuels, high energy density and conversion efficiency, and clean and environmentally friendly products. FCs are a type of electrical energy converting devices that generate electrical energy from chemical energy via the reactions between the oxidation of chemical fuels (hydrogen, methanol, formic acid, or ethanol) at the anode and the reduction of oxygen at the cathode at the interface of the electrocatalyst and electrolyte [5]. Electrocatalysts play crucial roles in determining the performance of a fuel cell. Meanwhile, the performance of an electrocatalyst is strongly dependent on its size, shape, and composition. Therefore, the design and fabrication of electrocatalysts are of top priority among the components in a fuel cell. Structure-controlled synthesis and surface functionalization of inorganic metals or metal oxides are effective routes in improving the stability and performance of electrocatalysts.Graphene is an atomically thin two-dimensional (2D) carbon sheet with a hexagonal-packed lattice structure and has attracted increasing research interests in both scientific studies and technological development since it was discovered by Geim et al. [6] in 2004. In recent years, graphene materials with different forms have been synthesized, such as 2D graphene nanosheets (GNSs), 1D graphene nanoribbons (GNRs), and 0D graphene quantum dots (GQDs) [7]. Graphene possesses the chemical and physical advantages of high surface area (∼2600 m 2 g −1 ), chemical and thermal stability, distinct long-range π conjugation and graphitized basal plane structure, and a broad potential window, as well as excellent electrical conductivity (10 5 -10 6 S m −1 ) and mechanical properties [8][9][10][11]. With these Graphene-based Energy Devices, First Edition. Edited by A. Rashid bin Mohd Yusoff.

show abstract

“…7,8 Additionally, one dimensional (1D) nanowires composed of noble metals, especially Pt and Pd, have shown enhanced catalytic performance dependent on structure and composition. [9][10][11][12] A variety of methods have been demonstrated to achieve anisotropic nanomaterials. Template directed synthesis is one of the most widely reported approaches.…”

Section: Introductionmentioning

confidence: 99%

Surface ligand mediated growth of CuPt nanorods

Baddeley

et al. 2014

CrystEngComm

View full text Add to dashboard Cite

A ligand mediated growth mechanism is proposed for nonorientated 1D assembly of CuPt nanoparticles.Please check this proof carefully. Our staff will not read it in detail after you have returned it.Translation errors between word-processor files and typesetting systems can occur so the whole proof needs to be read. Please pay particular attention to: tabulated material; equations; numerical data; figures and graphics; and references. If you have not already indicated the corresponding author(s) please mark their name(s) with an asterisk. Please e-mail a list of corrections or the PDF with electronic notes attached -do not change the text within the PDF file or send a revised manuscript. Corrections at this stage should be minor and not involve extensive changes. All corrections must be sent at the same time.Please bear in mind that minor layout improvements, e.g. in line breaking, table widths and graphic placement, are routinely applied to the final version.Please note that, in the typefaces we use, an italic vee looks like this: n, and a Greek nu looks like this: ν.We will publish articles on the web as soon as possible after receiving your corrections; no late corrections will be made.Please return your final corrections, where possible within 48 hours of receipt, by e-mail to: crystengcomm@rsc.org Queries for the attention of the authors CuPt alloy nanorods have been synthesized via one dimensional assembly of randomly orientated nanocrystallites in the presence of hexadecanoic acid and hexadecylamine as surface ligands. When hexadecanoic acid was added into the synthetic system first followed by a second step of adding hexadecylamine, strands of ultrathin CuPt nanowires were produced. The roles of the amine and organic acid are discussed. A novel ligand mediated mechanism is proposed, in which the formation of a stable monolayer structure of the ligands is the driving force to guide the 1D growth of the alloy nanorods without the influence of the crystal orientation. Photocatalytic hydrogen production from water has been performed using CuPt nanorods as a cocatalyst, which has a higher production rate (234.08 μmol h −1 g −1 )than that of Pt nanorods under the same conditions (~66.35 μmol h −1 g −1 ). Our results suggest that polycrystalline CuPt nanorods with a large amount of defects are probably promising cocatalyst for photocatalysis.

show abstract

Synthesis of Ultrathin FePtPd Nanowires and Their Use as Catalysts for Methanol Oxidation Reaction

Cited by 306 publications

References 22 publications

FePt and CoPt Nanowires as Efficient Catalysts for the Oxygen Reduction Reaction

FePt and CoPt Nanowires as Efficient Catalysts for the Oxygen Reduction Reaction

Graphene‐Supported Metal Nanostructures with Controllable Size and Shape as Advanced Electrocatalysts for Fuel Cells

Surface ligand mediated growth of CuPt nanorods

Contact Info

Product

Resources

About