Loading effect of carbon-supported platinum nanocubes on oxygen electroreduction

Jukk, Kristel; Kongi, Nadežda; Tammeveski, Kaido; Arán‐Ais, Rosa M.; Solla-Gullón, José; Feliu, Juan M.

doi:10.1016/j.electacta.2017.08.099

Cited by 27 publications

(25 citation statements)

References 80 publications

(126 reference statements)

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“…The differences in dissolution observed here may also correlate to the stability towards dissolution of preferentially shaped Pt or Pt alloy nanoparticles, which show great promise in terms of activity . It could be hypothesized that octahedral shaped nanoparticles exposing Pt(111) facets dissolve less than cubic shapes exposing Pt(100).…”

Section: Discussionmentioning

confidence: 99%

“…In the quest to improve electrocatalyst activity towards the oxygen reduction reaction (ORR) and reduce the required quantities of platinum in the CL, one promising strategy is the use of platinum and platinum alloy nanoparticles with preferential shapes exposing the low index face-centered cubic crystal facets. [19][20][21][22][23][24][25][26][27] Although activity trends have been identified among the varied shapes and exposed facets, reaching firm conclusions has required the development of techniques to produced very clean surfaces. These difficulties highlight the need for well-defined systems in a bottom up approach to understanding electrocatalysis.…”

Section: Introductionmentioning

confidence: 99%

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Dissolution of Platinum Single Crystals in Acidic Medium

et al. 2019

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Platinum single crystal basal planes consisting of Pt(111), Pt(100), Pt(110) and reference polycrystalline platinum Pt(poly) were subjected to various potentiodynamic and potentiostatic electrochemical treatments in 0.1 M HClO4. Using the scanning flow cell coupled to an inductively coupled plasma mass spectrometer (SFC‐ICP‐MS) the transient dissolution was detected on‐line. Clear trends in dissolution onset potentials and quantities emerged which can be related to the differences in the crystal plane surface structure energies and coordination. Pt(111) is observed to have a higher dissolution onset potential while the generalized trend in dissolution rates and quantities was found to be Pt(110)>P(100)≈Pt(poly)>Pt(111).

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dissolution of Platinum Single Crystals in Acidic Medium

et al. 2019

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“…[60] In addition, the enhanced ORR activity may be ascribed to the superior electrical conductivities of Pt/rGOÀN composites. The highest SA value of 0.22 and 0.38 mA cm À2 in acidic and alkaline media, respectively, was obtained for Pt/rGOÀN catalyst.…”

Section: Electrochemical Reduction Of Oxygenmentioning

confidence: 99%

Oxygen Electroreduction on Pt Nanoparticles Deposited on Reduced Graphene Oxide and N‐doped Reduced Graphene Oxide Prepared by Plasma‐assisted Synthesis in Aqueous Solution

et al. 2018

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Platinum nanoparticles were deposited on reduced graphene oxide (rGO) and nitrogen-doped rGO (rGOÀN) by He/H 2 plasma jet treatment of H 2 PtCl 6 aqueous solution for electroreduction of oxygen. Physical characterization of the prepared catalysts was performed by scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectroscopy. Electrochemical characterization was carried out by cyclic voltammetry and CO-stripping techniques. The oxygen reduction reaction (ORR) activity of the prepared Pt/rGO and Pt/ rGOÀN catalyst materials was investigated using the rotating disk electrode method in 0.1 M KOH and 0.05 M H 2 SO 4 . In both acidic and alkaline electrolytes, the catalyst materials prepared by the plasma jet method demonstrated superior electrocatalytic properties compared to that of commercial 20 wt% Pt/ C catalyst. Specific activity values for the ORR in acid electrolyte were 2-fold and in alkaline media more than 3-fold higher than that obtained for commercial Pt/C catalyst.

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“…The O binding energy is related to the proton‐electron transfer mechanism, which determines the electrocatalytic activity of the ORR. Recently, a lot of researchers have been dedicated to design Pt‐based catalysts with different morphologies including nanocubes, nanowires, core‐shell structures, hollow structures, and alloys ,,. However, the high metal price and the low earth reserve of the Pt limit their industrial applications, as shown in Figure b .…”

Section: The Oxygen Reduction Reaction and Its Electrochemical Evaluamentioning

confidence: 99%

“…Recently, a lot of researchers have been dedicated to design Pt-based catalysts with different morphologies including nanocubes, nanowires, core-shell structures, hollow structures, and alloys. [8,46,[50][51][52][53] However, the high metal price and the low earth reserve of the Pt limit their industrial applications, as shown in Figure 2b. [46] The development of transition metal (Fe, Mn, Ni, and Co etc.)…”

Section: The Oxygen Reduction Reaction and Its Electrochemical Evaluamentioning

confidence: 99%

Importance of Electrocatalyst Morphology for the Oxygen Reduction Reaction

2019

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Proton/anion‐exchange membrane fuel cells (PEMFC and AEMFC), generating electricity from the H2 energy with zero‐carbon emission, have become very promising energy conversion devices to meet the increasing energy demand and reduce the dependence on fossil fuels. Currently, platinum (Pt) based materials have proven to be the most efficient electrocatalysts for the oxygen reduction reaction (ORR) at the cathode of the PEMFC and AEMFC. However, the high price and the limited reserve of Pt greatly hinder their industrial applications. Recently, transition metal‐nitrogen‐carbon (M−N−C) based material, as an efficient alternative to replace the precious metal Pt‐based material, has attracted researchers’ attention. Great contributions have been devoted to develop M−N−C based electrocatalysts. This review summarizes recent advances on M−N−C based electrocatalysts used for ORR from the point view of morphology. One‐dimensional (1D), two‐dimensional (2D), three‐dimensional (3D) and multi‐dimensional (MD) M−N−C materials were discussed thoroughly with particular attention on the relationship between the structure and the catalytic activity.

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Loading effect of carbon-supported platinum nanocubes on oxygen electroreduction

Cited by 27 publications

References 80 publications

Dissolution of Platinum Single Crystals in Acidic Medium

Dissolution of Platinum Single Crystals in Acidic Medium

Oxygen Electroreduction on Pt Nanoparticles Deposited on Reduced Graphene Oxide and N‐doped Reduced Graphene Oxide Prepared by Plasma‐assisted Synthesis in Aqueous Solution

Importance of Electrocatalyst Morphology for the Oxygen Reduction Reaction

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