Facile synthesis and enhanced catalytic activity of electrochemically dealloyed platinum–nickel nanoparticles towards formic acid electro-oxidation

Kiani, Maryam; Zhang, Jie; Luo, Yan; Chen, Yihan; Chen, Jinwei; Fan, Jinlong; Wang, Gang; Wang, Ruilin

doi:10.1016/j.jechem.2018.10.011

Cited by 23 publications

(6 citation statements)

References 41 publications

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“…They either resist CO adsorption on the Pt surface and/or facilitate oxidative removal of adsorbed CO from the Pt surface. The first approach is realised by coupling Pt with other metals such as Ni [38][39][40][41], Bi [42][43][44], Sb [45], and Rh [46] through so-called ensemble and/or electronic effects. Another approach is based on the enrichment of the surface with oxygen-containing species via the so-called bifunctional mechanism by alloying Pt, e.g., with metal oxides such as NiO x [47][48][49][50], CoOx [47], Cu 2 O [51], FeOx [52], and MnO x [53,54], which are characterised by their ability to allow the electrochemical dissociation of water at potentials more negative than that of bare Pt [55,56].…”

Section: Introductionmentioning

confidence: 99%

Pt-Coated Ni Layer Supported on Ni Foam for Enhanced Electro-Oxidation of Formic Acid

Nacys,

Simkunaitė,

Balciunaite

et al. 2023

Materials

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A Pt-coated Ni layer supported on a Ni foam catalyst (denoted PtNi/Nifoam) was investigated for the electro-oxidation of the formic acid (FAO) in acidic media. The prepared PtNi/Nifoam catalyst was studied as a function of the formic acid (FA) concentration at bare Pt and PtNi/Nifoam catalysts. The catalytic activity of the PtNi/Nifoam catalysts, studied on the basis of the ratio of the direct and indirect current peaks (jd)/(jnd) for the FAO reaction, showed values approximately 10 times higher compared to those on bare Pt, particularly at low FA concentrations, reflecting the superiority of the former catalysts for the electro-oxidation of FA to CO2. Ni foams provide a large surface area for the FAO, while synergistic effects between Pt nanoparticles and Ni-oxy species layer on Ni foams contribute significantly to the enhanced electro-oxidation of FA via the direct pathway, making it almost equal to the indirect pathway, particularly at low FA concentrations.

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Section: Introductionmentioning

confidence: 99%

Pt-Coated Ni Layer Supported on Ni Foam for Enhanced Electro-Oxidation of Formic Acid

Nacys,

Simkunaitė,

Balciunaite

et al. 2023

Materials

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“…Many catalysts containing bi-or trimetallic nanosized alloy particles distributed over the surface of the carbon support have been thus obtained. Among them, systems such as Pt 1−x Co x /C Vulcan [27], Pt 1−x Ni x /C Vulcan [28,29], Pt 1−x Fe x /C Vulcan [14,30], Pt 1−x Fe x /N-C [31], Pt 1−x Cu x /C [32,33], PtNi 3 Cr/C [32], Pt 1−x Sn x /C graphene [34], Pt 1−x Ru x /N-C [35], and Pt 1−x Pb x /C Vulcan [36] should be mentioned. These catalysts exhibit sufficiently high activity in the reactions of oxygen reduction and methanol or hydrogen oxidation.…”

Section: Introductionmentioning

confidence: 99%

Pt1−xNix Alloy Nanoparticles Embedded in Self-Grown Carbon Nanofibers: Synthesis, Properties and Catalytic Activity in HER

et al. 2023

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The development of new heterogeneous Pt-containing catalysts has retained its relevance over the past decades. The present paper describes the method to produce metal–carbon composites, Pt1−xNix/CNF, with an adjustable Pt/Ni ratio. The composites represent Pt1−xNix (x = 0.0–1.0) nanoparticles embedded within a structure of carbon nanofibers (CNF). The synthesis of the composites is based on a spontaneous disintegration of Pt1−xNix alloys in an ethylene-containing atmosphere with the formation of CNF. The initial Pt1−xNix alloys were prepared by thermolysis of multicomponent precursors. They possess a porous structure formed by fragments of 100–200 nm. As was shown by X-ray diffraction analysis, the crystal structure of the alloys containing 0–30 and 60–100 at.% Ni corresponds to a fcc lattice based on platinum (Fm-3m), while the Pt0.50Ni0.50 sample is an intermetallic compound with the tetragonal structure (P4/mmm). The impact of the Ni content in the Pt1−xNix samples on their activity in ethylene decomposition was studied as well. As was revealed, the efficiency of Pt1−xNix alloys in this process increases with the rise of Ni concentration. The composite samples were examined in an electrochemical hydrogen evolution reaction. The synthesized Pt1-xNix/CNF composites demonstrated superior activity if compared with the Pt/Vulcan commercial catalyst.

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“…[ 12 ] Among carbon‐based materials, carbon black, porous carbon, carbon nanotubes (CNTs), and graphene are commonly used as catalyst supports. [ 13 ] Currently, Pt nanoparticles (NPs) supported on high‐surface‐area carbon supports are widely used as catalysts. [ 14 ] Catalysts are an important element in design as they can directly affect the efficiency, durability, and cost of fuel cells.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Durability and Catalytic Performance of Pt–SnO₂/Multi‐Walled Carbon Nanotube with Shifted d‐Band Center for Proton‐Exchange Membrane Fuel Cells

Min,

Choi,

Kang

et al. 2023

Small Structures

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Worldwide, significant efforts are made to identify energy sources that can help achieve carbon neutrality and promote sustainable development. The development of a catalyst that combines durability and high performance is essential for the commercialization of proton‐exchange membrane fuel cells (PEMFCs). In a fuel cell, carbon corrosion occurs during startup and shutdown due to improper local flooding caused by inadequate water management. In this study, a Pt‐based catalyst is designed with excellent durability and high activity. Introducing a metal oxide layer modified with Pt/multi‐walled carbon nanotubes reduces the direct contact between carbon and the fuel cell environment. This helps prevent carbon corrosion and inhibits the separation, aggregation, and growth of Pt nanoparticles. Moreover, the catalyst exhibits enhanced oxygen reduction activity due to the electronic effect of the metal oxide layer that is coated on it. In this study, by implementing a carbon erosion acceleration protocol, excellent catalytic properties during a load‐cycling experiment consisting of 5,000 cycles are reported. The practical application of the developed catalyst in PEMFCs offers an effective approach to developing Pt‐group metal catalysts with exceptional activity.

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Facile synthesis and enhanced catalytic activity of electrochemically dealloyed platinum–nickel nanoparticles towards formic acid electro-oxidation

Cited by 23 publications

References 41 publications

Pt-Coated Ni Layer Supported on Ni Foam for Enhanced Electro-Oxidation of Formic Acid

Pt-Coated Ni Layer Supported on Ni Foam for Enhanced Electro-Oxidation of Formic Acid

Pt1−xNix Alloy Nanoparticles Embedded in Self-Grown Carbon Nanofibers: Synthesis, Properties and Catalytic Activity in HER

Enhanced Durability and Catalytic Performance of Pt–SnO₂/Multi‐Walled Carbon Nanotube with Shifted d‐Band Center for Proton‐Exchange Membrane Fuel Cells

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Facile synthesis and enhanced catalytic activity of electrochemically dealloyed platinum–nickel nanoparticles towards formic acid electro-oxidation

Cited by 23 publications

References 41 publications

Pt-Coated Ni Layer Supported on Ni Foam for Enhanced Electro-Oxidation of Formic Acid

Pt-Coated Ni Layer Supported on Ni Foam for Enhanced Electro-Oxidation of Formic Acid

Pt1−xNix Alloy Nanoparticles Embedded in Self-Grown Carbon Nanofibers: Synthesis, Properties and Catalytic Activity in HER

Enhanced Durability and Catalytic Performance of Pt–SnO2/Multi‐Walled Carbon Nanotube with Shifted d‐Band Center for Proton‐Exchange Membrane Fuel Cells

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Enhanced Durability and Catalytic Performance of Pt–SnO₂/Multi‐Walled Carbon Nanotube with Shifted d‐Band Center for Proton‐Exchange Membrane Fuel Cells