Generation of OH radicals in oxygen reduction reaction at Pt–Co nanoparticles supported on graphene in alkaline solutions

Yue, Qiaoli; Zhang, Ke; Chen, Xiumei; Wang, Lei; Zhao, Jinsheng; Liu, Jifeng; Jia, Jianbo

doi:10.1039/c000084a

Cited by 64 publications

(57 citation statements)

References 41 publications

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“…In addition to the oxidation of alcohol and formic acid in fuel cells, graphene and Pt alloy nanocomposites also find applications in PEMFCs (Proton Exchange Membrane Fuel Cells), which used as electrocatalysts for the oxygen reduction reaction (ORR). 423 ORR plays an important role in the electrochemistry of fuel cells, particularly in PEMFCs and PEFCs. 424 In a recent study, HRG/Pt nanocomposites prepared with perfluorosulfonic acid (PFSA) as functionalization and anchoring agent, were applied as electrocatalyst for ORR.…”

Section: Fuel Cellsmentioning

confidence: 99%

Graphene based metal and metal oxide nanocomposites: synthesis, properties and their applications

et al. 2015

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Section: Fuel Cellsmentioning

confidence: 99%

Graphene based metal and metal oxide nanocomposites: synthesis, properties and their applications

et al. 2015

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“…For example, Rizo et al 34 studied ORR on stepped Pt surfaces in alkaline media, the Pt (111) surface exhibited a consistent "double waves" in all its ORR spectra. Also, Yue et al 35 observed the same phenomenon in a study on the generation of OH radicals by Pt alloy catalysts in alkaline media. From the RDE plots (Fig.…”

Section: Oxygen Reduction Reactionmentioning

confidence: 58%

Oxygen reduction reaction at MWCNT-modified nanoscale iron(ii) tetrasulfophthalocyanine: remarkable performance over platinum and tolerance toward methanol in alkaline medium

Fashedemi

Ozoemena

2015

RSC Adv.

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A nanoscale iron(II) tetrasulfophthalocyanine (nanoFeTSPc) catalyst obtained by co-ordinating with hexadecyltrimethylammonium bromide and subsequently anchored onto multi-walled carbon nanotubes (MWCNTs) for oxygen reduction reaction (ORR) has been reported. Two types of MWCNTs, hydroxyl/carboxyl-functionalized (o-MWCNTs) and sulfonate-functionalized (s-MWCNTs) were used as the supporting platforms for the catalysts (nanoFeTSPc-o-MWCNT and nanoFeTSPc-s-MWCNT, only 9 wt% loading of the nanoFeTSPc). The nanoFeTSPc-o-MWCNT gave the best performance towards ORR in terms of high catalytic current density, more positive onset potential (E onset ¼ À0.02 V vs. Ag/AgCl), half-wave potential (E 1/2 ¼ À0.32 V vs. Ag/AgCl), and high catalytic rate constant (k $ 1.6 Â 10 À2 cm s

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“…In addition to metal nanoclusters, much work has been done on the synthesis of graphene-supported monometallic (Au [53], Pt [54][55][56][57][58], and Pd [27,59]) or metal alloy (PtPd [33,36,60,61], PtRu [62][63][64], PtAu [12,28,35,65], PdAg [66,67], PtFe [68,69], PtCo [14,70,71], PtNi [72][73][74][75], PtPdAu [76,77]) NPs and their electrocatalytic activities for fuel cells [42]. Among the alloy nanostructures, PtRu NPs have received special attention because of their high catalytic performance as both anodic and cathodic catalysts.…”

Section: Graphene-supported Monometallic and Alloy Metal Nanoparticlementioning

confidence: 99%

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

Liu

Chen

2015

Graphene‐based Energy Devices

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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.

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Generation of OH radicals in oxygen reduction reaction at Pt–Co nanoparticles supported on graphene in alkaline solutions

Abstract: A dependence of oxygen reduction reaction activity and generation of OH radicals upon the composition of Pt-Co alloy electrocatalyst supported on graphene was found in alkaline solutions.

Cited by 64 publications

References 41 publications

Graphene based metal and metal oxide nanocomposites: synthesis, properties and their applications

Graphene based metal and metal oxide nanocomposites: synthesis, properties and their applications

Oxygen reduction reaction at MWCNT-modified nanoscale iron(ii) tetrasulfophthalocyanine: remarkable performance over platinum and tolerance toward methanol in alkaline medium

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

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