Activity and Stability of Pt/C and Pt-Cu/C Electrocatalysts

Гутерман, В. Е.; Беленов, С. В.; Alekseenko, A. A.; Lin, Rui; Tabachkova, N. Yu.; Safronenko, O.I.

doi:10.1007/s12678-017-0451-1

Cited by 31 publications

(17 citation statements)

References 55 publications

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“…Despite the enormous efforts made, the electrocatalytic activity of earth-abundant metals is still low compared with IrO 2 , RuO 2 or Pt catalysts [61]. Therefore, there is still great interest in improving the performance of earth-abundant metals for HER and OER, particularly Ni, Co, Mn, and Fe.…”

Section: Introductionmentioning

confidence: 99%

Atomic layer deposition of Pd nanoparticles on self-supported carbon-Ni/NiO-Pd nanofiber electrodes for electrochemical hydrogen and oxygen evolution reactions

Barhoum

El-Maghrabi

Iatsunskyi

et al. 2020

Journal of Colloid and Interface Science

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h i g h l i g h t sSelf-supported CNF-Ni/NiO-Pd electrodes were fabricated. Electrospinning with atomic layer deposition were used for the electrode fabrication. CNF-Ni/NiO-Pd electrodes were used for HER and OER reactions under acidic and basic conditions. CNF-Ni/NiO-Pd electrodes have shown high HER and OER activity compared to Pt and IrO 2 catalysts. Synergistic effect between the graphitic nanosheets, Ni/NiO and Pd NPs at the nanointerfaces has been highlighted.

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Section: Introductionmentioning

confidence: 99%

Atomic layer deposition of Pd nanoparticles on self-supported carbon-Ni/NiO-Pd nanofiber electrodes for electrochemical hydrogen and oxygen evolution reactions

Barhoum

El-Maghrabi

Iatsunskyi

et al. 2020

Journal of Colloid and Interface Science

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“…This follows from the comparison of voltammograms (Figure 7), the values of the specific kinetic currents of ORR on the studied catalysts before (Table 2), and after (Table 3) the completion of the stress test. The relationship between the ORR mass activity of the catalysts with specific activity and ESA can be expressed by Equation 6 [36]:…”

Section: Resultsmentioning

confidence: 99%

“…When the same support is used, the stability of Pt/C catalysts during their operation is affected primarily by the mass fraction of the metal and the size of the nanoparticles [32,33]. The cata- lyst stability, as a rule, increases with increasing NP size [14,22,[32][33][34][35][36]. The probability of agglomeration and coalescence of NPs during a stress test also decreases with an increase in the average distance between platinum NPs in catalysts, which results in an increase of their stability [14].…”

Section: Introductionmentioning

confidence: 99%

Stability and activity of platinum nanoparticles in the oxygen electroreduction reaction: is size or uniformity of primary importance?

Paperzh¹,

Alekseenko²,

Волочаев³

et al. 2021

Beilstein J. Nanotechnol.

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Platinum–carbon catalysts are widely used in the manufacturing of proton-exchange membrane fuel cells. Increasing Pt/C activity and stability is an urgent task and the optimization of their structure seems to be one of the possible solutions. In the present paper, Pt/C electrocatalysts containing small (2–2.6 nm) nanoparticles (NPs) of a similar size, uniformly distributed over the surface of a carbon support, were obtained by the original method of liquid-phase synthesis. A comparative study of the structural characteristics, catalytic activity in the oxygen electroreduction reaction (ORR), and durability of the synthesized catalysts, as well as their commercial analogs, was carried out. It was shown that the uniformity of the structural and morphological characteristics of Pt/C catalysts makes it possible to reduce the negative effect of the small size of NPs on their stability. As a result, the obtained catalysts were significantly superior to their commercial analogs regarding ORR activity, but not inferior to them in terms of stability.

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“…Both have previously been characterized extensively by us (BP2000) 44 and other authors (HiSPEC 3000 Pt/C). 45 − 48 These supports were selected primarily for their electron transfer properties and ease of handling, though we have previously demonstrated that a wide range of carbon materials is suitable for this type of heterogeneous biocatalysis. 44 , 49 Enzymes were immobilized (or coimmobilized) onto the carbon black supports by a simple adsorption process.…”

Section: Catalyst Preparationmentioning

confidence: 99%

Hybrid Chemo-, Bio-, and Electrocatalysis for Atom-Efficient Deuteration of Cofactors in Heavy Water

2021

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Deuterium-labeled nicotinamide cofactors such as [4- 2 H]-NADH can be used as mechanistic probes in biological redox processes and offer a route to the synthesis of selectively [ 2 H] labeled chemicals via biocatalytic reductive deuteration. Atom-efficient routes to the formation and recycling of [4- 2 H]-NADH are therefore highly desirable but require careful design in order to alleviate the requirement for [ 2 H]-labeled reducing agents. In this work, we explore a suite of electrode or hydrogen gas driven catalyst systems for the generation of [4- 2 H]-NADH and consider their use for driving reductive deuteration reactions. Catalysts are evaluated for their chemoselectivity, stereoselectivity, and isotopic selectivity, and it is shown that inclusion of an electronically coupled NAD + -reducing enzyme delivers considerable advantages over purely metal based systems, yielding exclusively [4 S - 2 H]-NADH. We further demonstrate the applicability of these types of [4 S - 2 H]-NADH recycling systems for driving reductive deuteration reactions, regardless of the facioselectivity of the coupled enzyme.

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Activity and Stability of Pt/C and Pt-Cu/C Electrocatalysts

Cited by 31 publications

References 55 publications

Atomic layer deposition of Pd nanoparticles on self-supported carbon-Ni/NiO-Pd nanofiber electrodes for electrochemical hydrogen and oxygen evolution reactions

Atomic layer deposition of Pd nanoparticles on self-supported carbon-Ni/NiO-Pd nanofiber electrodes for electrochemical hydrogen and oxygen evolution reactions

Stability and activity of platinum nanoparticles in the oxygen electroreduction reaction: is size or uniformity of primary importance?

Hybrid Chemo-, Bio-, and Electrocatalysis for Atom-Efficient Deuteration of Cofactors in Heavy Water

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