Efficient hydrogen evolution electrocatalysis in alkaline medium using Pd-modified zeolite X

Vasić, Milica; Čebela, Maria; Pašti, Igor A.; Amaral, Luís; Hercigonja, Radmila; Santos, Diogo M.F.; Šljukić, Biljana

doi:10.1016/j.electacta.2017.11.020

Cited by 29 publications

(21 citation statements)

References 64 publications

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“…Thus, HER activation energy values of 38, 45, and 44 kJ mol −1 were determined for Pd/VSAC, Pd/GSAC and Pd/Vulcan, respectively. These values are comparable with the E a value of 39 kJ mol −1 obtained for HER at the PdX zeolite [32] and comparable to/higher than the E a value of 30 kJ mol −1 obtained for HER at pure Pd [39]. However, it should be pointed out that the use of novel activated bio-based carbon supports is extremely useful in reducing the electrocatalyst cost as a result of the significantly lower amount of Pd used.…”

Section: Her Studiessupporting

confidence: 81%

“…Furthermore, the HER j 0 values obtained with Pd grafted onto the novel VSAC support are higher than those reported for two Pd-modified carbon fibre electrodes, of 0.16 mA cm −2 and 0.02 mA cm −2 , in alkaline 0.1 M NaOH electrolyte at room temperature [36,37]. The obtained values are also higher than that reported for Pd-ion exchanged X zeolite (0.04 mA cm −2 ) in 8 M KOH at 25 • C [32]. Chen et al [38] also evaluated Pd-based catalysts supported on carbon nanofibre and reported a j 0 of 1.53 mA cm −2 , similar to those obtained herein.…”

Section: Her Studiesmentioning

confidence: 54%

“…The specific current densities are much higher than that obtained at PdX zeolite of ca. 20 mA mg −1 at a potential of −0.35 V in 8 M KOH at 25 • C [32].…”

Section: Her Studiesmentioning

confidence: 99%

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Vine Shoots and Grape Stalks as Carbon Sources for Hydrogen Evolution Reaction Electrocatalyst Supports

et al. 2018

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Activated bio-based carbons produced from vine shoots (VSAC) and grape stalks (GSAC), which have larger surface area and total pore volume than most of the commercially available activated carbons, are used as supports for palladium nanoparticles (Pd NPs). The prepared materials are characterised by elemental analysis, N 2 -sorption, X-ray diffraction, scanning electron microscopy with energy dispersive X-ray spectroscopy, and transmission electron microscopy analysis and are then assessed as potential cathodes for the hydrogen evolution reaction (HER) in alkaline media. The electrocatalysts' performance for HER is evaluated from cathodic polarisation curves at different temperatures and compared to that of Vulcan XC72-supported Pd NPs. Additional chronoamperometry studies helped to assess the electrocatalysts' activity stability. The novel VSAC-supported Pd electrocatalyst exhibits good HER activity in terms of high current density at low overpotentials, leading to the best performance.

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Section: Her Studiessupporting

confidence: 81%

Section: Her Studiesmentioning

confidence: 54%

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Vine Shoots and Grape Stalks as Carbon Sources for Hydrogen Evolution Reaction Electrocatalyst Supports

et al. 2018

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“…Chemisorption at the interface is the key step here, and the activity trends can be related to the chemisorption of hydrogen and formation of Hads at the metallic phase. It also seems that in some cases, oxides could be put on the classical HER volcano curve (Figure 8) where Hads bond strength with oxide surface can be taken as the descriptor of catalytic activity [68].…”

Section: Chemisorption On Metal Oxidesmentioning

confidence: 99%

Chemisorption as the essential step in electrochemical energy conversion - Review

Dobrota

Pašti

2020

J. Electrochem. Sci. Eng.

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<p class="PaperAbstract">Growing world population and energy demands have placed energy conversion and storage into the very centre of modern research. Electrochemical energy conversion systems including batteries, fuel cells, and supercapacitors, are widely considered as the next generation power sources. Even though they rely on different mechanisms of energy conversion and storage, fundamentally these are all electrochemical cells, operating through processes taking place at the solid/liquid interfaces, i.e. electrodes. Considering the interfacial nature of electrodes, it is clear that adsorption phenomena cannot be neglected when considering electrochemical systems. More than that, they are of crucial importance for electrochemical processes and represent an essential step in electrochemical energy conversion. In this contribution we give an overview of the phenomena underlying the operation of sustainable metal-ion batteries, fuel cells and supercapacitors, ranging from electrocatalytic reactions and pseudo-faradaic processes to purely adsorptive processes, emphasizing the types, roles and significance of chemisorption. We review experimental and theoretical methods which can provide information about chemisorption in the mentioned systems, stressing the importance of combining both approaches.</p>

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“…Powder X‐ray diffraction (powder‐XRD) further demonstrates the crystalline nature of the Ru‐FAU catalyst (Supporting Information, Figure S9b) and showed that the native structure of the FAU support is conserved . Broadening of the peaks combined with a decrease in peak intensity suggests that the different crystalline frameworks are entangled and slightly amorphous …”

Section: Figurementioning

confidence: 97%

Indirect CO₂ Methanation: Hydrogenolysis of Cyclic Carbonates Catalyzed by Ru‐Modified Zeolite Produces Methane and Diols

et al. 2018

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We report a ruthenium‐modified zeolite which efficiently transforms propylene carbonate to propylene glycol and methane, under solvent‐free conditions. The catalyst achieved high product selectivity and no significant ageing effect was observed after multiple cycles. The resulting liquid product (water‐containing glycol) can be directly used as anti‐freeze solution and the gas phase can directly be used as an energy carrier in the form of H2‐enriched methane. This process efficiently bridges energy storage and an important chemical synthesis under sustainable (CO2 consuming) conditions.

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Efficient hydrogen evolution electrocatalysis in alkaline medium using Pd-modified zeolite X

Cited by 29 publications

References 64 publications

Vine Shoots and Grape Stalks as Carbon Sources for Hydrogen Evolution Reaction Electrocatalyst Supports

Vine Shoots and Grape Stalks as Carbon Sources for Hydrogen Evolution Reaction Electrocatalyst Supports

Chemisorption as the essential step in electrochemical energy conversion - Review

Indirect CO₂ Methanation: Hydrogenolysis of Cyclic Carbonates Catalyzed by Ru‐Modified Zeolite Produces Methane and Diols

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Efficient hydrogen evolution electrocatalysis in alkaline medium using Pd-modified zeolite X

Cited by 29 publications

References 64 publications

Vine Shoots and Grape Stalks as Carbon Sources for Hydrogen Evolution Reaction Electrocatalyst Supports

Vine Shoots and Grape Stalks as Carbon Sources for Hydrogen Evolution Reaction Electrocatalyst Supports

Chemisorption as the essential step in electrochemical energy conversion - Review

Indirect CO2 Methanation: Hydrogenolysis of Cyclic Carbonates Catalyzed by Ru‐Modified Zeolite Produces Methane and Diols

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Indirect CO₂ Methanation: Hydrogenolysis of Cyclic Carbonates Catalyzed by Ru‐Modified Zeolite Produces Methane and Diols