Surfactant-Directed Synthesis of Ternary Nanostructures: Nanocubes, Polyhedrons, Octahedrons, and Nanowires of PtNiFe. Their Shape-Dependent Oxygen Reduction Activity

Chou, Shang Wei; Shyue, Jing Jong; Chien, Chia Hua; Chen, Chia Chun; Chen, Yang Yuan; Chou, Pi‐Tai

doi:10.1021/cm301039a

Cited by 52 publications

(54 citation statements)

References 48 publications

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“…The first strategy is to reduce Pt usage by alloying Pt with inexpensive metals (Fe, Ni, etc.) [32][33] and/or depositing Pt on porous and conductive supports like carbon. [34][35] Although the required Pt loading has been reduced significantly in the last decade, the increasing price of Pt has greatly compromised the Pt loading reduction, making this approach effective for shortterm time only.…”

Section: Oxygen Reduction Reaction (Orr)mentioning

confidence: 99%

Heteroatom-Doped Graphene-Based Materials for Energy-Relevant Electrocatalytic Processes

et al. 2015

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To address the aggravating energy and environment issues, the cheap, highly active, and durable electrocatalysts as noble metal substitutes both at the anode and cathode are actively pursued. Among them, heteroatom-doped graphene-based materials show extraordinary electrocatalytic performance, some even close to or outperforming the state-of-the-art noble metals such as Pt and IrO 2 -based materials. This review provides a concise appraisal on graphene doping methods, the possible doping configurations and their unique electrochemical properties, including single-and double-doping with N, B, S, and P. In addition, heteroatom-doped graphene-based materials are reviewed as electrocatalysts for oxygen reduction (ORR), hydrogen evolution (HER), and oxygen evolution reactions (OER) in terms of their electrocatalytic mechanisms and performance. Significantly, three-dimensional (3D) heteroatom-doped graphene structures have been discussed, especially those that can be directly utilized as catalyst electrodes without extra binders and supports.

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Section: Oxygen Reduction Reaction (Orr)mentioning

confidence: 99%

Heteroatom-Doped Graphene-Based Materials for Energy-Relevant Electrocatalytic Processes

et al. 2015

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“…The activity and stability for the ORR of ordered, octahedral, and dealloyed ternary Pt‐Ni‐Fe catalysts were also widely investigated . The MA of ordered fcc Pt 31 Ni 34 Fe 35 was higher than that of ordered fcc Pt 32 Fe 54 V 14 , but the SAs of these catalysts were almost similar .…”

Section: Orr On Ternary Pt‐ni‐m Electrocatalystsmentioning

confidence: 99%

“…Chou et al prepared Pt‐Ni‐Fe catalysts enclosed by {111} and/or {100} facets, such as nanocubes, octahedrons, polyhedrons, and nanowires, by fine‐tuning the catalyst compositions and surfactants. The ORR MA and SA of all as‐prepared Pt‐Ni‐Fe nanostructures were higher than those of Pt/C in different electrolytes.…”

Section: Orr On Ternary Pt‐ni‐m Electrocatalystsmentioning

confidence: 99%

“…The activity and stability for the ORR of ordered, octahedral, and dealloyed ternary Pt-Ni-Fe catalysts were also widely investigated. 111,[146][147][148][149][150][151] The MA of ordered fcc Pt 31 Ni 34 Fe 35 was higher than that of ordered fcc Pt 32 Fe 54 V 14 , but the SAs of these catalysts were almost similar. 146,147 Moreover, the MA of the ordered fcc Pt 31 Ni 34 Fe 35 catalyst was higher than those of Pt/C and Pt-Fe/C.…”

Section: Pt-ni-fe Catalystsmentioning

confidence: 99%

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The oxygen reduction on Pt-Ni and Pt-Ni-M catalysts for low-temperature acidic fuel cells: A review

Antolini¹

2018

Int J Energy Res

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Summary For its wide availability and low cost, nickel is a promising candidate to be used as a cocatalyst in Pt‐based catalysts for proton exchange membrane fuel cells. Among Pt‐M (M = transition metal) catalysts for oxygen reduction, Pt‐Ni is the one which can be used in various forms, that is, as disordered Pt1‐xNix solid solutions, ordered intermetallic phases, octahedral‐shaped structures (with a preferential {111} facet orientation), dealloyed structures, and hollow and 1‐dimensional nanostructures. In this work, an overview of the oxygen reduction on Pt‐Ni and Pt‐Ni‐M (M = Co, Fe, Cu) catalysts and their stability in proton exchange membrane fuel cell environment is presented.

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“…[1, 2] To address this issue, numerous efforts have focused on the design and manipulation of morphology, [3] composition, [4] and chemical modification [5] of Pt electrocatalysts, where rather significant progresses have been achieved. [1] Platinum-electrocatalytic oxygen reduction reaction (ORR) is one of the key reactions in LPEFCs.…”

mentioning

confidence: 99%

Synthesis, Self‐Assembly, and Electrocatalysis of Polyallylamine‐Functionalized Platinum Nanocubes

Zhao

Ding

et al. 2013

ChemPlusChem

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Low-temperature polymer electrolyte fuel cells (LPEFCs), such as proton-exchange membrane fuel cells, direct alcohol fuel cells, and direct formic acid fuel cells are regarded as promising power sources for automotive, portable and stationary systems. [1] Platinum-electrocatalytic oxygen reduction reaction (ORR) is one of the key reactions in LPEFCs. However, the sluggish kinetics of ORR and poor stability of electrocatalysts holds back the commercialization of LPEFCs. [1, 2] To address this issue, numerous efforts have focused on the design and manipulation of morphology, [3] composition, [4] and chemical modification [5] of Pt electrocatalysts, where rather significant progresses have been achieved. For example, Pt{100}-terminated Pt nanocubes (Pt-NCs) exhibited significantly enhanced specific activity towards the ORR in H 2 SO 4 electrolyte resulting from the facet effect. [6] In particular, the cyanide-functionalized Pt{111}-CNad showed a 25-fold increase towards the ORR compared with naked Pt{111} facets in the H 2 SO 4 electrolyte. [6] To make the most use of the Pt metal and lower the cost of LPEFCs, Pt nanoparticles are loaded on carbon nanotubes (CNTs) because of their extraordinary physical, chemical, and mechanical properties, such as large surface area, high electrical conductivity, special chemical stability, and good corrosion resistance. [7] Herein, the polyallylamine (PAH)-functionalized Pt nanocubes (Pt-NCs) are successfully synthesized through a facile hydrothermal method. The positively charged Pt-NCs are directly assembled onto the negatively charged carboxylated CNTs through electrostatic interaction. The as-prepared Pt-NCs/CNTs nanohybrid show enhanced electrocatalytic activity, durability, and alcohol tolerance towards the ORR compared with commercial Pt/C catalyst.Solution-phase growth is an effective route for the synthesis of single-crystal Pt nanostructures having high quality. In a typical synthesis of the Pt-NCs, solutions of K 2 PtCl 4 , PAH, and HCHO were mixed together with water, and the pH of the resulting mixture was adjusted to 3.0. The homogeneous solution was heated at 140 8C for 6 hours to obtain the PAH-functionalized Pt-NCs. Then, the carboxylated CNTs were added into the above Pt-NCs suspension and sonicated for 2 hours, then separated by centrifugation. Finally, the as-prepared Pt-NCs/CNTs nanohybrid was consecutively treated with UV/ ozone and electrochemical cleaning to remove the majority of capping agent (i.e. PAH) prior to electrochemical testing (see the Experimental Section for details).The morphology of the Pt nanocrystals was investigated by transmission electron microscopy (TEM). As observed, the asprepared Pt nanocrystals are well-defined and preserve a cubic shape (87 % cubes, 4 % triangles, and 9 % irregular shapes, Figure 1 A). The average edge length of the Pt-NCs is 4 nm. The well-resolved lattice fringes and selected area electron diffraction (SAED) pattern indicate the single crystal structure of the Pt-NCs (Figure 1 B). The d spacing of adjacen...

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Surfactant-Directed Synthesis of Ternary Nanostructures: Nanocubes, Polyhedrons, Octahedrons, and Nanowires of PtNiFe. Their Shape-Dependent Oxygen Reduction Activity

Cited by 52 publications

References 48 publications

Heteroatom-Doped Graphene-Based Materials for Energy-Relevant Electrocatalytic Processes

Heteroatom-Doped Graphene-Based Materials for Energy-Relevant Electrocatalytic Processes

The oxygen reduction on Pt-Ni and Pt-Ni-M catalysts for low-temperature acidic fuel cells: A review

Synthesis, Self‐Assembly, and Electrocatalysis of Polyallylamine‐Functionalized Platinum Nanocubes

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