Synthesis of Pt-based hollow nanoparticles using carbon-supported Co@Pt and Ni@Pt core–shell structures as templates: Electrocatalytic activity for the oxygen reduction reaction

Cantane, Daniel A.; Oliveira, Francisca Elenice Rodrigues de; Santos, Sydney Ferreira; Lima, Fabio H. B.

doi:10.1016/j.apcatb.2013.01.060

Cited by 77 publications

(24 citation statements)

References 45 publications

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“…In the "soft templating" method, cooperative interactions between inorganic or organic species such as micelles, reverse micelles, and microemulsions are used to design the porous materials [5]. Recently, using a "hard templating" method based on galvanic replacement and the nanoscale Kirkendall effect, we and other groups synthesized hollow PtCo/C or PtNi/C nanoparticles to electrocatalyze the oxygen reduction reaction (ORR) in proton-exchange membrane fuel cells (PEMFCs) [3,4,[7][8][9]11]. Alloying Pt with a 3d transition metal such as Co, [12][13][14][15][16][17][18] Ni, [14,15,[19][20][21] Y, [22,23] Sc, [24] or Gd, [25] is a common way to tailor the chemisorption energies of oxygen-containing ORR intermediates via strain [26][27][28][29][30] and ligand [31][32][33] effects.…”

Section: Introductionmentioning

confidence: 99%

Atomic-scale restructuring of hollow PtNi/C electrocatalysts during accelerated stress tests

et al. 2016

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Section: Introductionmentioning

confidence: 99%

Atomic-scale restructuring of hollow PtNi/C electrocatalysts during accelerated stress tests

et al. 2016

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“…For example, Lin et al [469] synthesized Co@Pt electrocatalysts for ORRs and obtained a mass activity of 50.3 mA mg Pt −1 at 0.9 V versus RHE, which is 1.43 times that of commercial Pt/C (JM) catalysts. Other groups have also reported the good catalytic activity of core-shell-structured Co@Pt electrocatalysts for ORRs [455,470] and Kettner et al [471] attributed this activity to the decrease in oxygen binding energies mainly originating from electronic effects [471]. However, there is a gap for the catalytic activity of Co@Pt in these reports in which the size of Co cores influences the continuity of Pt shells.…”

Section: Co As Corementioning

confidence: 60%

Core–Shell-Structured Low-Platinum Electrocatalysts for Fuel Cell Applications

Wang

Luo

et al. 2018

Electrochem. Energ. Rev.

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Pt-based catalysts are the most efficient catalysts for low-temperature fuel cells. However, commercialization is impeded by prohibitively high costs and scarcity. One of the most effective strategies to reduce Pt loading is to deposit a monolayer or a few layers of Pt over other metal cores to form core-shell-structured electrocatalysts. In core-shell-structured electrocatalysts, the compositions of the core can be divided into five classes: single-precious metallic cores represented by Pd, Ru, and Au; singlenon-precious metallic cores represented by Cu, Ni, Co, and Fe; alloy cores containing 3d, 4d or 5d metals; and carbide and nitride cores. Of these, researchers have found that carbide and nitride cores can yield tremendous advantages over alloy cores in terms of cost and promotional activities of Pt shells. In addition, desirable shells with reasonable thicknesses and compositions have been recognized to play a dominant role in electrocatalytic performances. And recently, researchers have also found that the catalytic activity of core-shell-structured catalysts is dependent on the binding energy of the adsorbents, which is determined by the d-band center of Pt. The shifting of this d-band center in turn is mainly affected by strain and electronic effects, which can be adjusted by adjusting core compositions and shell thicknesses of catalysts. In the development of these core-shell structures, optimal synthesis methods are of primary concern because they directly determine the practical application potential of the resulting electrocatalysts. And in this article, the principles behind core-shell-structured low-Pt electrocatalysts and the developmental progresses of various synthesis methods along with the traits of each type of core and its effects on Pt shell catalytic activities are discussed. In addition, perspectives on this type of catalyst are discussed and future research directions are proposed.

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“…GO was prepared according to the modified Hummers method [27]. Briefly, powdered graphite (1.0 g) and NaNO 3 (0.8 g) were added to 98% H 2 SO 4 (35 mL) in an ice bath.…”

Section: Preparation Of Graphene Oxide (Go)mentioning

confidence: 99%

Star-like PtCu nanoparticles supported on graphene with superior activity for methanol electro-oxidation

Chen

Zhao

Peng

et al. 2015

Electrochimica Acta

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Synthesis of Pt-based hollow nanoparticles using carbon-supported Co@Pt and Ni@Pt core–shell structures as templates: Electrocatalytic activity for the oxygen reduction reaction

Cited by 77 publications

References 45 publications

Atomic-scale restructuring of hollow PtNi/C electrocatalysts during accelerated stress tests

Atomic-scale restructuring of hollow PtNi/C electrocatalysts during accelerated stress tests

Core–Shell-Structured Low-Platinum Electrocatalysts for Fuel Cell Applications

Star-like PtCu nanoparticles supported on graphene with superior activity for methanol electro-oxidation

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