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Maria, G. De; Ferro, D.; D’Alessio, L.; Teghil, R.; Баринов, С. М.

doi:10.1023/a:1004811504475

Cited by 11 publications

(2 citation statements)

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“…Among binary metal carbides, tantalum and hafnium carbides are of particular interest, due to the extremely high melting points, and relatively high hardness. − More importantly, recent studies have shown the high catalytic response of Ta-C nanocomposites in acidic media . Although, a general drawback of this system is the large difference between the catalytic efficiency of Pt/C and that of Ta-C, which has been mainly associated with the uptake of oxygen by the Ta-C surface, an effect that was observed even after tribological and mechanical testing .…”

Section: Introductionmentioning

confidence: 99%

High Electrocatalytic Response of Ultra-refractory Ternary Alloys of Ta-Hf-C Carbide toward Hydrogen Evolution Reaction in Acidic Media

et al. 2018

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Transition metal carbide alloys are promising materials to replace platinum as electrodes in electrocatalysts toward the hydrogen evolution reaction (HER). Although tantalum hafnium carbides (Ta-Hf-C) have shown outstanding refractory and structural properties, there is no clear role of their electrochemical efficiency. Here we report on the electrochemical activity of such thin films, (Ta 2 C) (100−x)% •(Hf 2 C) (x)% , x = 100, 70, 30, and 0, deposited by magnetron sputtering. Grazing incidence X-ray diffraction showed no evidence of phase segregation, and XPS confirms the well-controlled stoichiometry of the electrodes. The HER kinetics was studied in strong acidic conditions, and it was found that the (Ta 2 C) 70% •(Hf 2 C) 30% was the most active material toward HER in this acid media and displayed an onset overpotential of −198 mV vs NHE and a Tafel slope of 129 mV•dec −1 . Our results suggest that the strong affinity of Hf-C toward oxygen reduction reaction could be responsible for the high catalytic response and strong oxidation resistance of the ternary carbide alloys. Finally, we show that, in fact, the Ta-Hf-C alloys can be competitive materials toward HER.

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Section: Introductionmentioning

confidence: 99%

High Electrocatalytic Response of Ultra-refractory Ternary Alloys of Ta-Hf-C Carbide toward Hydrogen Evolution Reaction in Acidic Media

et al. 2018

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“…Among these, pulsed laser deposition (PLD) technique has been successfully employed to deposit thin carbide films on silicon, providing films of high hardness [8][9][10][11]. In particular PLD performed by ultra-short pulse lasers (pulse duration of 1 ps or less) have been already used to deposit thin films of tantalum carbide, obtaining thin films formed of tantalum hemicarbide (Ta 2 C) instead of tantalum monocarbide (TaC) [12].…”

Section: Introductionmentioning

confidence: 99%