Core–shell Pt modified Pd/C as an active and durable electrocatalyst for the oxygen reduction reaction in PEMFCs

Zhang, Geng; Shao, Zhigang; Lu, Wenxian; Xie, Feng; Xiao, Hui; Qin, Xiaoping; Yi, Baolian

doi:10.1016/j.apcatb.2012.11.029

Cited by 77 publications

(46 citation statements)

References 36 publications

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“…On the basis of experimental results reported, the XRD diffraction peaks for the bimetallic alloyed catalysts will shift positively relative to the corresponding core-shell structures whose shell metal possesses larger lattice parameters than that of the core metal, e.g., Co-Pd [30] and Co-Pt [31] systems. Similar results had been observed by our groups on the Pt modified Pd/C catalysts [32]. The STEM-EDX and XRD results confirmed that the PdPt NCs presented an alloy structure.…”

Section: Physical Characterization Of Pdpt Ncssupporting

confidence: 78%

Electrochemical preparation and characterization of PdPt nanocages with improved electrocatalytic activity toward oxygen reduction reaction

Zhang

Shao

et al. 2013

Electrochimica Acta

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Section: Physical Characterization Of Pdpt Ncssupporting

confidence: 78%

Electrochemical preparation and characterization of PdPt nanocages with improved electrocatalytic activity toward oxygen reduction reaction

Zhang

Shao

et al. 2013

Electrochimica Acta

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“…1419) In addition, for PtM alloy catalysts, selective dissolution of M occurs and the dissolved M ions lead to performance loss. 1,20,21) Pickering et al investigated the dissolution behavior of various binary alloys and classified it into two forms: selective dissolution and simultaneous dissolution. These behaviors were explained on the basis of the difference in the standard electrode potential between two metals and their chemical compositions.…”

Section: Introductionmentioning

confidence: 99%

Selective Dissolution of Pt–Co Binary Alloys and Surface Enrichment of Platinum in Sulfuric Acid Solution

Ooi¹,

Hoshi

Tada³

et al. 2014

Mater. Trans.

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“…7 Several techniques have been explored in an attempt to produce efficient Pt electrocatalysts including chemical and physical methods such as chemical reduction [8][9][10] or sputter deposition techniques. 11-13 However, these techniques either lead to high metal loading with poor control of the size distribution or have proven difficult to scale up.…”

mentioning

confidence: 99%

“…6 Attempts to optimize the platinum utilization have occurred in parallel with the development of new ways to produce Pt nanostructures with smaller size and a better Pt dispersion on the support. 7 Several techniques have been explored in an attempt to produce efficient Pt electrocatalysts including chemical and physical methods such as chemical reduction [8][9][10] or sputter deposition techniques. [11][12][13] However, these techniques either lead to high metal loading with poor control of the size distribution or have proven difficult to scale up.…”

mentioning

confidence: 99%

Electrically Bloomed Platinum Nanoflowers on Exfoliated Graphene: An Efficient Alcohol Oxidation Catalyst

Zhang

Lopes

et al. 2016

J. Electrochem. Soc.

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Platinum (Pt) based electrocatalysts have electrochemical performance that outperforms many other noble metal and metal oxide based materials. Increasing performance allows a reduction in the platinum load, and thus reduce the cost of various devices such as fuel cells. A double pulse electrochemical approach was developed to nucleate and grow Pt nanoparticles into flower shaped assemblies on graphene sheets. The unique morphology and structure of the Pt were characterized by field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM). The electrocatalytical activities of the Pt nanoflowers were evaluated using methanol and ethanol oxidation as model reactions. This proposed method has led to the synthesis of Pt nanoflowers with the ability to control, both their density and their size on defect free graphene. Alternative and renewable energy sources such as hydrogen and fuel cells provide a great opportunity to overcome the challenge of pollution and energy crises.1 However, cost, performance, and durability of these energy sources are major barrier for their wide-spread commercialization. It is the key driver behind the significant research on electrocatalysts that are used for various energy devices. Carbon supports, such as carbon black, Vulcan X and Ketjen Black, are generally used as supports for electrocatalysts for electrochemical applications. These electrodes using these carbon supports, however, present some important limitations such as inadequate corrosion resistance caused by electrochemical oxidation, structural deterioration, as well as the detachment of the active metal phase. Compared to carbon black, graphene, a two-dimensional carbon nanostructure, exhibits a higher corrosion resistance, high surface area and outstanding electronic, thermal, and mechanical properties; and is anticipated to be a promising replacement for conventional carbon supports.2-4 Recently we have developed an electrochemical exfoliation approach that reproducibly produced graphene at high yield and purity with the ability to modify graphene with polystyrene sulfonate to prevent re-stacking of the sheets. 5Making Pt-based electrocatalysts more-efficient is crucial as this directly leads to less precious metal usage, i.e. lower cost.6 Attempts to optimize the platinum utilization have occurred in parallel with the development of new ways to produce Pt nanostructures with smaller size and a better Pt dispersion on the support. 7 Several techniques have been explored in an attempt to produce efficient Pt electrocatalysts including chemical and physical methods such as chemical reduction [8][9][10] or sputter deposition techniques. 11-13 However, these techniques either lead to high metal loading with poor control of the size distribution or have proven difficult to scale up.9,14 Although great effort has been made toward the development of chimie douce production of shape-controlled Pt nanoparticles, hierarchical nanostructures with high specific surface area remain a challenge. 15 Additiona...

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Core–shell Pt modified Pd/C as an active and durable electrocatalyst for the oxygen reduction reaction in PEMFCs

Cited by 77 publications

References 36 publications

Electrochemical preparation and characterization of PdPt nanocages with improved electrocatalytic activity toward oxygen reduction reaction

Electrochemical preparation and characterization of PdPt nanocages with improved electrocatalytic activity toward oxygen reduction reaction

Selective Dissolution of Pt–Co Binary Alloys and Surface Enrichment of Platinum in Sulfuric Acid Solution

Electrically Bloomed Platinum Nanoflowers on Exfoliated Graphene: An Efficient Alcohol Oxidation Catalyst

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Core–shell Pt modified Pd/C as an active and durable electrocatalyst for the oxygen reduction reaction in PEMFCs

Cited by 77 publications

References 36 publications

Electrochemical preparation and characterization of PdPt nanocages with improved electrocatalytic activity toward oxygen reduction reaction

Electrochemical preparation and characterization of PdPt nanocages with improved electrocatalytic activity toward oxygen reduction reaction

Selective Dissolution of Pt&ndash;Co Binary Alloys and Surface Enrichment of Platinum in Sulfuric Acid Solution

Electrically Bloomed Platinum Nanoflowers on Exfoliated Graphene: An Efficient Alcohol Oxidation Catalyst

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Selective Dissolution of Pt–Co Binary Alloys and Surface Enrichment of Platinum in Sulfuric Acid Solution