Transition metal carbides (WC, Mo2C, TaC, NbC) as potential electrocatalysts for the hydrogen evolution reaction (HER) at medium temperatures

Meyer, Simon; Nikiforov, Aleksey Valerievich; Petrushina, Irina; Köhler, Klaus; Christensen, Erik R.; Jensen, Jens Oluf; Bjerrum, Niels

doi:10.1016/j.ijhydene.2014.12.076

Cited by 188 publications

(84 citation statements)

References 58 publications

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“…Inorganic materials based on transition metal sulfides [34], phosphides [35], carbides [36] or borides [37,38] have been shown to have electro-catalytic efficiencies that begin to be competitive with platinum. The family of materials that has been most widely studied is transition metal sulfides, possibly because of their long time use as catalysts in oil desulfurization processes [39].…”

Section: Studies Of Transition Metal Sulfide Her Catalysts Using Mmentioning

confidence: 99%

In situ/Operando studies of electrocatalysts using hard X-ray spectroscopy

Lassalle‐Kaiser

Gul

Kern

et al. 2017

Journal of Electron Spectroscopy and Related Phenomena

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This review focuses on the use of X-ray absorption and emission spectroscopy techniques using hard X-rays to study electrocatalysts under in situ/operando conditions. We describe the importance and the versatility of methods in the study of electrodes in contact with the electrolytes, when being cycled through the catalytic potentials during the progress of the oxygen-evolution, oxygen reduction and hydrogen evolution reactions. The catalytic oxygen evolution reaction is illustrated with examples using Co, Ni and Mn oxides, and Mo and Co sulfides are used as an example for the hydrogen evolution reaction. A bimetallic, bifunctional oxygen evolving and oxygen reducing Ni/Mn oxide is also presented. The various advantages and constraints in the use of these techniques and the future outlook are discussed.

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Section: Studies Of Transition Metal Sulfide Her Catalysts Using Mmentioning

confidence: 99%

In situ/Operando studies of electrocatalysts using hard X-ray spectroscopy

Lassalle‐Kaiser

Gul

Kern

et al. 2017

Journal of Electron Spectroscopy and Related Phenomena

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“…Among these catalysts, transition-metal carbides have recently received a great amount of attention because of their similar electronic structure to that of Pt, good corrosion resistance and stability. 10 Particularly, one such carbide, molybdenum carbide (Mo 2 C) is one of the most potential transition-metal carbides due to its efficient catalytic activity, good conductivity, high melting point and low cost.…”

Section: 5mentioning

confidence: 99%

In situ synthesis of molybdenum carbide/N-doped carbon hybrids as an efficient hydrogen-evolution electrocatalyst

Zhou

et al. 2018

RSC Adv.

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The development of non-precious metal based electrocatalysts for the hydrogen evolution reaction (HER) has received more and more attention over recent years owing to energy and environmental issues, and Mo based materials have been explored as a promising candidate. In this work, molybdenum carbide/N-doped carbon hybrids (Mo 2 C@NC) were synthesized facilely via one-step high-temperature pyrolysis by adjusting the mass ratio of urea and ammonium molybdate. The Mo 2 C@NC consisted of ultrasmall nanoparticles encapsulated by N-doped carbon, which had high specific surface area. They all exhibited efficient HER activity, and the Mo 2 C@NC with a mass ratio of 160 (Mo 2 C@NC-160) showed the best HER activity, with a low overpotential of 90 mV to reach 10 mA cm À2 and a small Tafel slope of 50 mV dec À1, which was one of the most active reported Mo 2 C-based electrocatalysts. The excellent HER activity of Mo 2 C@NC-160 was attributed to the following features: (1) the highly dispersed ultrasmall Mo 2 C nanoparticles, which exhibited high electrochemically active surface areas; (2) the synergistic effect of the N-doped carbon shell/matrix, which facilitated the electron transport.

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“…The efficient conversion of solar energy into molecular hydrogen demands the fabrication of competitive and reliable nanomaterials with tunable properties . Photocatalytic reactions such as hydrogen (HER)/oxygen (OER) evolution reactions are at the forefront of energy research today . Photo water splitting is expected to become a serious candidate to substitute our strong dependency on fossil energy, especially since it has made great improvements in the past three decades, featuring the use of renewable energy with a cleanable way of storing it, via water splitting .…”

Section: Introductionmentioning

confidence: 99%

Photoelectrochemically Active N‐Adsorbing Ultrathin TiO₂ Layers for Water‐Splitting Applications Prepared by Pyrolysis of Oleic Acid on Iron Oxide Nanoparticle Surfaces under Nitrogen Environment

Kertmen

Barbé

Szkoda

et al. 2018

Adv Materials Inter

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Highly performing photocatalytic surfaces are nowadays highly desirable in energy fields, mainly due to their applicability as photo water‐splitting electrodes. One of the current challenges in this field is the production of highly controllable and efficient photoactive surfaces on many substrates. Atomic layer deposition has allowed the deposition of photoactive TiO2 layers over wide range of materials and surfaces. However, nitrogen doping of the growing layers, a highly effective way of controlling the absorption edges of photoactive surfaced, is still a challenging task. Here, the preparation of hierarchical nanostructured surfaces based on Langmuir–Schaefer and atomic layer deposition is proposed. Ultrathin TiO2 layers that are photoelectrochemically active in water splitting are prepared by a relatively low‐temperature catalytic decomposition of oleic acid capping layers of iron oxide nanoparticles and the posterior nitrogen adsorption. The results evidence that simple N‐adsorption is sufficient to narrow the bandgap of TiO2 layers that is equal to bandgap narrowing (0.12 eV) observed for substitutionally N‐doped materials. The photocatalytic activity tests of the prepared surfaces in water‐splitting applications demonstrate ≈90% increase in the activity of the N‐adsorbing TiO2 layers.

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Transition metal carbides (WC, Mo2C, TaC, NbC) as potential electrocatalysts for the hydrogen evolution reaction (HER) at medium temperatures

Cited by 188 publications

References 58 publications

In situ/Operando studies of electrocatalysts using hard X-ray spectroscopy

In situ/Operando studies of electrocatalysts using hard X-ray spectroscopy

In situ synthesis of molybdenum carbide/N-doped carbon hybrids as an efficient hydrogen-evolution electrocatalyst

Photoelectrochemically Active N‐Adsorbing Ultrathin TiO₂ Layers for Water‐Splitting Applications Prepared by Pyrolysis of Oleic Acid on Iron Oxide Nanoparticle Surfaces under Nitrogen Environment

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Transition metal carbides (WC, Mo2C, TaC, NbC) as potential electrocatalysts for the hydrogen evolution reaction (HER) at medium temperatures

Cited by 188 publications

References 58 publications

In situ/Operando studies of electrocatalysts using hard X-ray spectroscopy

In situ/Operando studies of electrocatalysts using hard X-ray spectroscopy

In situ synthesis of molybdenum carbide/N-doped carbon hybrids as an efficient hydrogen-evolution electrocatalyst

Photoelectrochemically Active N‐Adsorbing Ultrathin TiO2 Layers for Water‐Splitting Applications Prepared by Pyrolysis of Oleic Acid on Iron Oxide Nanoparticle Surfaces under Nitrogen Environment

Contact Info

Product

Resources

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Photoelectrochemically Active N‐Adsorbing Ultrathin TiO₂ Layers for Water‐Splitting Applications Prepared by Pyrolysis of Oleic Acid on Iron Oxide Nanoparticle Surfaces under Nitrogen Environment