High-performance PtCux@Pt core-shell nanoparticles decorated with nanoporous Pt surfaces for oxygen reduction reaction

Jung, Namgee; Sohn, Yeonsun; Park, Jin Hoo; Nahm, Kee Suk; Kim, Pil; Yoo, Sung Jong

doi:10.1016/j.apcatb.2016.05.028

Cited by 52 publications

(18 citation statements)

References 34 publications

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“…1). To achieve this, researchers have developed many Pt-based catalysts with tunable sizes and morphologies [40][41][42][43][44], including core-shell structured [45][46][47][48][49] and alloy catalysts [50][51][52][53][54][55]. Here, core-shell structured and alloy catalysts are promising because they can not only reduce Pt loading by incorporating other metal(s) to allow for higher mass activity (A mg Pt −1 ), but can also surpass the intrinsic activity of Pt catalysts through interactions between Pt and metal counterparts or core metals that can affect electronic structures [43,56,57].…”

Section: Precious Metal Catalystsmentioning

confidence: 99%

Recent Progresses in Oxygen Reduction Reaction Electrocatalysts for Electrochemical Energy Applications

Wang

et al. 2019

Electrochem. Energ. Rev.

204

106

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Electrochemical energy storage systems such as fuel cells and metal-air batteries can be used as clean power sources for electric vehicles. In these systems, one necessary reaction at the cathode is the catalysis of oxygen reduction reaction (ORR), which is the rate-determining factor affecting overall system performance. Therefore, to increase the rate of ORR for enhanced system performances, efficient electrocatalysts are essential. And although ORR electrocatalysts have been intensively explored and developed, significant breakthroughs have yet been achieved in terms of catalytic activity, stability, cost and associated electrochemical system performance. Based on this, this review will comprehensively present the recent progresses of ORR electrocatalysts, including precious metal catalysts, non-precious metal catalysts, single-atom catalysts and metal-free catalysts. In addition, major technical challenges are analyzed and possible future research directions to overcome these challenges are proposed to facilitate further research and development toward practical application.

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Section: Precious Metal Catalystsmentioning

confidence: 99%

Recent Progresses in Oxygen Reduction Reaction Electrocatalysts for Electrochemical Energy Applications

Wang

et al. 2019

Electrochem. Energ. Rev.

204

106

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“…The research goals of ORR catalyst were summarized by Wei et al [32] Important research foci are to increase active sites and enhance intrinsic catalytic activity (Figure 2a). Based on this research direction, many studies have developed a number of Pt-based catalysts, including core-shell structures, [33][34][35][36][37] alloy catalysts, [38][39][40][41][42][43] and catalysts with tunable size and shape. [44][45][46][47][48] Among the precious metals, Pt-based catalysts have been the most amply studied ORR catalysts.…”

Section: Platinum-based Catalystsmentioning

confidence: 99%

“…[28,37] 2.1.6. Core-Shell Structured Catalysts Core-shell structured Pt bimetallic catalyst is a special type of Pt alloy catalyst, in which the active Pt shell protects supporting transition metal core (e.g., Pd, [82] Ni, [83] and Cu [33] ). This strategy mitigates the dissolution of the transition metal core, and can enhance ORR activity through the interaction between Pt and core metal.…”

Section: Alloy and Doping Effect Of Pt Nanostructures For Orr Activitymentioning

confidence: 99%

Electrochemical Catalysts for Green Hydrogen Energy

Kweon

Jeon

Baek

2021

Adv Energy and Sustain Res

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Developing clean and renewable energy resources has become one of the world's most important challenges, given the double burden of energy scarcity and environmental pollution. For sustainable energy conversion and storage, efficient electrocatalysts play a pivotal role in important energy-related reactions, including oxygen reduction, oxygen evolution, and hydrogen evolution. To satisfy practical requirements, the catalysts need to demonstrate high performance, durability, and acceptable cost. These are primary considerations when designing and preparing various new electrocatalysts. Among the research programs being actively conducted around the world, some promising recent results suggest strong potential alternatives to current expensive noble metal-based catalysts. This review summarizes recent technical advances in the preparation of efficient electrocatalysts.

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“…These include Pt-based nanoparticles (e.g., Pt(Cu), Pt(CuCo), Pt(Ni), and Pt(Ag) [181][182][183][184][185][186][187][188][189][190]) and Pd-or Au-based nanoparticles, in some cases in combination with Pt (see, for example, [191][192][193][194][195][196][197][198]). …”

Section: Oxygen Reductionmentioning

confidence: 99%

Electrocatalysts Prepared by Galvanic Replacement

et al. 2017

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Galvanic replacement is the spontaneous replacement of surface layers of a metal, M, by a more noble metal, M noble , when the former is treated with a solution containing the latter in ionic form, according to the general replacement reaction: nM + mM noble n+ → nM m+ + mM noble. The reaction is driven by the difference in the equilibrium potential of the two metal/metal ion redox couples and, to avoid parasitic cathodic processes such as oxygen reduction and (in some cases) hydrogen evolution too, both oxygen levels and the pH must be optimized. The resulting bimetallic material can in principle have a M noble-rich shell and M-rich core (denoted as M noble (M)) leading to a possible decrease in noble metal loading and the modification of its properties by the underlying metal M. This paper reviews a number of bimetallic or ternary electrocatalytic materials prepared by galvanic replacement for fuel cell, electrolysis and electrosynthesis reactions. These include oxygen reduction, methanol, formic acid and ethanol oxidation, hydrogen evolution and oxidation, oxygen evolution, borohydride oxidation, and halide reduction. Methods for depositing the precursor metal M on the support material (electrodeposition, electroless deposition, photodeposition) as well as the various options for the support are also reviewed. 1. Principle of Galvanic Replacement/Deposition 1.1. Thermodynamic Considerations When a metal, M (e.g., Cu, Fe, Co, Ni, Al, etc.), is immersed in a solution containing ions of a more noble metal, M noble n+ (e.g., Pt, Au, Pd, Ag, Ru, Ir, Rh, Os, etc.-i.e., a metal with a higher standard potential) then, due to the difference in their standard electrochemical potentials, E 0 noble − E 0 > 0, and provided that the ionic form of M is stable under the given experimental conditions (of temperatue, pH, complexing agents etc.), the following reaction is thermodynamically favored and can take place spontaneously: M noble n+ + n/m M → M noble + n/m M m+ (1) This reaction, which bears similarities with transmetalation reactions between metal complexes [1] and is also known as immersion plating [2] in the plating industry and galvanic replacement [3] in materials chemistry, can be considered to originate from the coupling of the following two half-reactions: M noble n+ + ne − ↔ M noble (E 0 noble) (2) M m+ + me − ↔ M (E 0) (3)

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High-performance PtCux@Pt core-shell nanoparticles decorated with nanoporous Pt surfaces for oxygen reduction reaction

Cited by 52 publications

References 34 publications

Recent Progresses in Oxygen Reduction Reaction Electrocatalysts for Electrochemical Energy Applications

Recent Progresses in Oxygen Reduction Reaction Electrocatalysts for Electrochemical Energy Applications

Electrochemical Catalysts for Green Hydrogen Energy

Electrocatalysts Prepared by Galvanic Replacement

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