New physical technologies for catalyst synthesis and anticorrosion protection

Фатеев, В. Н.; Alekseeva, O. K.; Lutikova, Elena K.; Porembskiy, V.I.; Nikitin, S. M.; Mikhalev, Artem I.

doi:10.1016/j.ijhydene.2016.04.192

Cited by 12 publications

(7 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Data concerning film content and intermediate layers forming at the titanium-film interface show that the kinetic energy of the sputtered atoms is enough for their partial penetration into the titanium substrate. The results are in good agreement with results obtained in [21] which show that at Pt target sputtering, about 6% of the Pt atoms in the coating (Pt film) are replaced by Ti atoms (though the Pt coordination number remains the same). When Pt-C is used, the carbon atoms deposited on the substrate possibly limit the mobility of the deposited platinum species stabilizing Pt cluster growth.…”

Section: Discussionsupporting

confidence: 90%

“…The magnetron sputtering technique has already demonstrated some perspectives for polymer electrolyte electrolyzers and fuel cells [7,[21][22][23]35]. The further development of the methods described above could be very useful for such systems.…”

Section: Discussionmentioning

confidence: 99%

“…Increasing demand for catalysts, catalytic and protective coatings based on precious metals, in particular, for fuel cells and other electrochemical devices [13][14][15][16][17][18] along with the further development of magnetron sputtering has resulted in further improvement of catalysts and catalyst coatings production by this method. In the last decade, a number of investigations demonstrated the potential of magnetron sputtering for catalytic activity increase and for the reduction of platinum and other precious metals loading in catalysts on carbon carriers [4,[19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Structural and Electrocatalytic Properties of Platinum and Platinum-Carbon Layers Obtained by Magnetron-Ion Sputtering

et al. 2018

Self Cite

View full text Add to dashboard Cite

This article is devoted to further development of magnetron sputtering technology for catalysts and catalysts layer production for fuel cells and other electrochemical devices. Platinum-carbon films with Pt content up to 95–97 wt % were deposited using different sputtering regimes—DC (direct current) sputtering with and without application of a pulse negative bias voltage to the titanium substrate and also bipolar pulse sputtering with frequency of 10 kHz and 100 kHz. Composite platinum carbon targets were used for sputtering. Characteristics of platinum-carbon films were compared with those of platinum films deposited using the same regimes. The main methods of investigation were scanning transmission electron microscopy (STEM) with energy dispersive X-ray spectroscopy; potentiostatic and potentiodynamic methods. The catalytic activity of platinum-carbon films increased with platinum content and at a platinum concentration of 95–97 wt % became higher than that of platinum films sputtered in the same regimes. It was proposed that carbon atoms deposited on the substrate limited the mobility of the deposited platinum species and inhibited Pt cluster growth. Platinum-carbon films produced by pulsed DC magnetron sputtering with pulsed frequency 100 kHz consisted of narrow Pt columns with dome nanotops forming a well-developed surface. The porosity and specific surface of these columnar nanopillar films were higher compared with those of pure platinum films deposited under the same conditions. Moreover, the platinum-carbon films deposited using a bipolar pulse regime with a frequency of 100 kHz had the highest specific surface, porosity (30%) and catalytic activity in hydrogen and oxygen evolution due to a high ion current density and reduced pulse duration which inhibited the growth of large platinum globules.

show abstract

Section: Discussionsupporting

confidence: 90%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Structural and Electrocatalytic Properties of Platinum and Platinum-Carbon Layers Obtained by Magnetron-Ion Sputtering

et al. 2018

Self Cite

View full text Add to dashboard Cite

show abstract

“…The sputtering deposition process has been modified and developed into various types of sputtering techniques; such as ion-beam sputtering deposition, and has been proven to be the most important method in the preparation of various types of films [392,393]. This technology has also been successfully applied to the preparation of one-layer or multilayer film electrocatalysts such as Pt, PtRu, PtFe, PtCo, and PtNi [394][395][396][397]. Bimetallic films can also be prepared by using successive sputtering techniques, and core-shell-structured electrocatalysts can be formed in the case in which one layer of deposited metal is covered by a subsequent layer of deposited metal.…”

Section: Physical Depositionmentioning

confidence: 99%

Core–Shell-Structured Low-Platinum Electrocatalysts for Fuel Cell Applications

Wang

Luo

et al. 2018

Electrochem. Energ. Rev.

View full text Add to dashboard Cite

Pt-based catalysts are the most efficient catalysts for low-temperature fuel cells. However, commercialization is impeded by prohibitively high costs and scarcity. One of the most effective strategies to reduce Pt loading is to deposit a monolayer or a few layers of Pt over other metal cores to form core-shell-structured electrocatalysts. In core-shell-structured electrocatalysts, the compositions of the core can be divided into five classes: single-precious metallic cores represented by Pd, Ru, and Au; singlenon-precious metallic cores represented by Cu, Ni, Co, and Fe; alloy cores containing 3d, 4d or 5d metals; and carbide and nitride cores. Of these, researchers have found that carbide and nitride cores can yield tremendous advantages over alloy cores in terms of cost and promotional activities of Pt shells. In addition, desirable shells with reasonable thicknesses and compositions have been recognized to play a dominant role in electrocatalytic performances. And recently, researchers have also found that the catalytic activity of core-shell-structured catalysts is dependent on the binding energy of the adsorbents, which is determined by the d-band center of Pt. The shifting of this d-band center in turn is mainly affected by strain and electronic effects, which can be adjusted by adjusting core compositions and shell thicknesses of catalysts. In the development of these core-shell structures, optimal synthesis methods are of primary concern because they directly determine the practical application potential of the resulting electrocatalysts. And in this article, the principles behind core-shell-structured low-Pt electrocatalysts and the developmental progresses of various synthesis methods along with the traits of each type of core and its effects on Pt shell catalytic activities are discussed. In addition, perspectives on this type of catalyst are discussed and future research directions are proposed.

show abstract

“…As evolved by nature, the surface of lotus leaves has an intriguing self-cleaning character. 1,2 Therefore, the development of multifunctional and applied materials with superhydrophobic character has evoked great interest because of their potential applications in anti-icing, 3,4 heat transfer, 5,6 drag reduction, 7,8 antifogging 2,9 and anticorrosion technologies, 10,11 and so on. However, oil/water separation is a major potential application, which could be used for the cleanup of oil spills.…”

Section: Introductionmentioning

confidence: 99%

A robust duplex Cu/PDMS-coated mesh with superhydrophobic surface for applications in cleaning of spilled oil

Jin-hua

et al. 2017

RSC Adv.

View full text Add to dashboard Cite

In this study, we created a robust and stable nanostructure coated on the surface of a stainless steel mesh via the electrodeposition of copper thin films and chemical modification with polydimethylsiloxane (PDMS) to enhance the mechanical durability of the stainless steel mesh surface with superhydrophobic performance. The obtained stainless steel mesh was tested by immersion in solutions of different pH values and abrasion cycling tests with sandpaper. The results showed that the coated stainless steel mesh retained excellent superhydrophobic and superoleophilic properties. Using the superhydrophobic and superoleophilic stainless steel mesh, we achieved the recycling of oil automatically and continuously via a vacuum pump.Scheme 1 Fabrication process of superhydrophobic and superoleophilic stainless steel mesh for application in oil/water separation.

show abstract

New physical technologies for catalyst synthesis and anticorrosion protection

Cited by 12 publications

References 16 publications

Structural and Electrocatalytic Properties of Platinum and Platinum-Carbon Layers Obtained by Magnetron-Ion Sputtering

Structural and Electrocatalytic Properties of Platinum and Platinum-Carbon Layers Obtained by Magnetron-Ion Sputtering

Core–Shell-Structured Low-Platinum Electrocatalysts for Fuel Cell Applications

A robust duplex Cu/PDMS-coated mesh with superhydrophobic surface for applications in cleaning of spilled oil

Contact Info

Product

Resources

About