Pd-catalysts for DFAFC prepared by magnetron sputtering

Bieloshapka, I.; Jiřı́ček, P.; Vorokhta, Mykhailo; Tomšík, Elena; Rednyk, Andrii; Perekrestov, Roman; Jurek, K.; Ukraintsev, Egor; Hruška, Karel; Romanyuk, O.; Lesiak, B.

doi:10.1016/j.apsusc.2017.05.035

Cited by 17 publications

(5 citation statements)

References 45 publications

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“…The conformal deposition shows the improved contact surface area for catalysis through the monolithic foam supports. The methodology presented here may also be of interest in regard to highly porous supports (e.g., porous carbons) for catalytic and electrocatalytic [ 51 ] applications.…”

Section: Resultsmentioning

confidence: 99%

“…In order to increase activity at lower temperatures, where good selectivity is also expected, future work is foreseen to increase the surface roughness (higher carbon content), area and porosity. The control of microstructure and composition offered by magnetron sputtering, from pure Pd targets to the here proposed co-sputtering procedure, in a wide range of structured supports (including porous carbons) will strongly contribute to the development of both the catalytic decomposition and the electro-catalytic oxidation [ 51 , 57 ] of formic acid.…”

Section: Discussionmentioning

confidence: 99%

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Pd-C Catalytic Thin Films Prepared by Magnetron Sputtering for the Decomposition of Formic Acid

et al. 2021

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Formic acid is an advantageous liquid organic hydrogen carrier. It is relatively nontoxic and can be synthesized by the reaction of CO2 with sustainable hydrogen or by biomass decomposition. As an alternative to more widely studied powdery catalysts, supported Pd-C catalytic thin films with controlled nanostructure and compositions were newly prepared in this work by magnetron sputtering on structured supports and tested for the formic acid decomposition reaction. A two-magnetron configuration (carbon and tailored Pd-C targets) was used to achieve a reduction in Pd consumption and high catalyst surface roughness and dispersion by increasing the carbon content. Activity and durability tests were carried out for the gas phase formic acid decomposition reaction on SiC foam monoliths coated with the Pd-C films and the effects of column width, surface roughness and thermal pre-reduction time were investigated. Activity of 5.04 molH2·gPd−1·h−1 and 92% selectivity to the dehydrogenation reaction were achieved at 300 °C for the catalyst with a lower column width and higher carbon content and surface roughness. It was also found that deactivation occurs when Pd is sintered due to the elimination of carbon and/or the segregation and agglomeration of Pd upon cycling. Magnetron sputtering deposition appears as a promising and scalable route for the one-step preparation of Pd-C catalytic films by overcoming the different deposition characteristics of Pd and C with an appropriate experimental design.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Pd-C Catalytic Thin Films Prepared by Magnetron Sputtering for the Decomposition of Formic Acid

et al. 2021

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“…The majority of precious metal catalysts prepared using magnetron sputtering have focussed on electrochemical systems containing Pt and Au deposited on metallic substrates [21]. Pd film/nanoparticle deposition has been carried out on the following substrates: glass [22,23], glucose [24] silicon wafer [25,26], stainless steel [27], and a number of forms of carbon; glassy carbon [28], carbon black [29], carbon paper [30], carbon cloth [31], carbon nanotubes [32] and highly ordered pyrolytic graphite (HOPG) [33]. There are relatively few accounts of Pd nanoparticles deposited on commercial catalyst supports in powder form.…”

Section: Introductionmentioning

confidence: 99%

Methane oxidation over supported Pd catalysts prepared by magnetron sputtering

Shaw

Kulczyk-Malecka

Kelly

et al. 2021

Surface and Coatings Technology

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“…In the literature, many methods have been proposed for the design of more active and stable Pd anode catalysts in which an increase in CO poisoning tolerance is targeted. Second metal addition is one of the most commonly used methods to improve the catalyst activity by utilizing the synergistic effect between metals . Additionally, geometric and electronic structure of Pd can be optimized by the addition of a second metal .…”

Section: Introductionmentioning

confidence: 99%

“…Second metal addition is one of the most commonly used methods to improve the catalyst activity by utilizing the synergistic effect between metals. [28][29][30][31][32][33] Additionally, geometric and electronic structure of Pd can be optimized by the addition of a second metal. 34 Since Pd is an expensive metal, observing the positive effect of Pd on FAE activity even at very low molar ratio is another advantage provided by Pd-based bimetallic catalysts.…”

Section: Introductionmentioning

confidence: 99%

Determination of optimum Pd:Ni ratio for Pd _x Ni _{100‐
x} / CNT s formic acid electrooxidation catalysts synthesized via sodium borohydride reduction method

2019

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Summary The main purpose of this study is to investigate the optimum Pd:Ni molar ratio for carbon nanotube–supported PdNi (PdxNi100‐x/CNT) alloy catalysts toward formic acid electrooxidation (FAE). NaBH4 reduction method was employed for the synthesis of Pd90Ni10/CNT, Pd70Ni30/CNT, Pd50Ni50/CNT, and Pd40Ni60/CNT. Synthesized catalysts were characterized by employing advanced surface analytical techniques, namely, X‐ray diffraction (XRD), transmission electron microscopy (TEM), N2 adsorption‐desorption, and inductively coupled plasma–mass spectrometry (ICP‐MS). The characterization results showed that all catalysts were successfully synthesized at desired molar composition. Pd90Ni10/CNT displayed the highest specific and mass activities with 2.32 mA/cm2 and 613.9 mA/mg Pd, respectively. Specific activity of the Pd90Ni10/CNT was found approximately 3.6, 2.3, 11.1, and 3.4 times higher than those of Pd70Ni30/CNT, Pd50Ni50/CNT, Pd40Ni60/CNT, and Pd/CNT, respectively. The synergistic effect between Pd and Ni at optimized metal ratio was utilized to obtain an improvement in specific activity. Furthermore, Pd90Ni10/CNT showed the lowest charge transfer resistance (Rct) and a long‐term stability. To our knowledge, this is the first study reporting the optimization of atomic molar composition for PdxNi100‐x/CNT catalysts toward FAE.

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Pd-catalysts for DFAFC prepared by magnetron sputtering

Cited by 17 publications

References 45 publications

Pd-C Catalytic Thin Films Prepared by Magnetron Sputtering for the Decomposition of Formic Acid

Pd-C Catalytic Thin Films Prepared by Magnetron Sputtering for the Decomposition of Formic Acid

Methane oxidation over supported Pd catalysts prepared by magnetron sputtering

Determination of optimum Pd:Ni ratio for Pd _x Ni _{100‐
x} / CNT s formic acid electrooxidation catalysts synthesized via sodium borohydride reduction method

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Pd-catalysts for DFAFC prepared by magnetron sputtering

Cited by 17 publications

References 45 publications

Pd-C Catalytic Thin Films Prepared by Magnetron Sputtering for the Decomposition of Formic Acid

Pd-C Catalytic Thin Films Prepared by Magnetron Sputtering for the Decomposition of Formic Acid

Methane oxidation over supported Pd catalysts prepared by magnetron sputtering

Determination of optimum Pd:Ni ratio for Pd x Ni 100‐ x / CNT s formic acid electrooxidation catalysts synthesized via sodium borohydride reduction method

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Product

Resources

About

Determination of optimum Pd:Ni ratio for Pd _x Ni _{100‐
x} / CNT s formic acid electrooxidation catalysts synthesized via sodium borohydride reduction method