Core–shell MoO<sub>3</sub>–MoS<sub>2</sub> Nanowires for Hydrogen Evolution: A Functional Design for Electrocatalytic Materials

Chen, Zhebo; Cummins, Dustin R.; Reinecke, Benjamin N.; Clark, Ezra L.; Sunkara, Mahendra; Jaramillo, Thomas F.

doi:10.1021/nl2020476

Cited by 1,112 publications

(939 citation statements)

References 60 publications

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“…À 0.9 V versus RHE). The further improvement in activity may be due to the fact that the np-Ag catalyst contains a higher density of step sites with possibly higher-index facets supported by the highly curved surface 34,35 . At higher overpotentials (Z40.25), a sharp increase of the slope indicates the effect of another rate-limiting step.…”

Section: Discussionmentioning

confidence: 99%

A selective and efficient electrocatalyst for carbon dioxide reduction

et al. 2014

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Converting carbon dioxide to useful chemicals in a selective and efficient manner remains a major challenge in renewable and sustainable energy research. Silver is an interesting electrocatalyst owing to its capability of converting carbon dioxide to carbon monoxide selectively at room temperature; however, the traditional polycrystalline silver electrocatalyst requires a large overpotential. Here we report a nanoporous silver electrocatalyst that is able to electrochemically reduce carbon dioxide to carbon monoxide with approximately 92% selectivity at a rate (that is, current) over 3,000 times higher than its polycrystalline counterpart under moderate overpotentials of o0.50 V. The high activity is a result of a large electrochemical surface area (approximately 150 times larger) and intrinsically high activity (approximately 20 times higher) compared with polycrystalline silver. The intrinsically higher activity may be due to the greater stabilization of CO 2 À intermediates on the highly curved surface, resulting in smaller overpotentials needed to overcome the thermodynamic barrier.

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Section: Discussionmentioning

confidence: 99%

A selective and efficient electrocatalyst for carbon dioxide reduction

et al. 2014

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“…The substoichiometric MoO 3 core provides a high aspect ratio template and enables facile charge transport, while the conformal MoS 2 shell provides excellent catalytic activity and protection against corrosion in strong acids. 34 The nanowires were stable over 10000 cycles of cycling stability test. Fig.…”

Section: This Journal Is © the Royal Society Of Chemistry 2014mentioning

confidence: 94%

Nanostructured hydrotreating catalysts for electrochemical hydrogen evolution

2014

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Progress in catalysis is driven by society's needs. The development of new electrocatalysts to make renewable and clean fuels from abundant and easily accessible resources is among the most challenging and demanding tasks for today's scientist and engineers. The electrochemical splitting of water into hydrogen and oxygen has been known for over 200 years, but in the last decade and motivated by the perspective of solar hydrogen production, new catalysts made of earth-abundant materials have emerged. Here we present an overview of recent developments of the non-noble metal catalysts for electrochemical hydrogen evolution reaction (HER). Emphasis is given to the nanostructuring of industrially relevant hydrotreating catalysts as potential HER electrocatalysts. The new syntheses and nanostructuring approaches might pave the way to future developments of highly efficient catalysts for energy conversion.

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“…Extensive efforts have been made to improve the HER activities of MoS 2 ‐based catalysts in acidic media by strategies such as nanostructure engineering,35, 36, 37, 38 defect engineering,39, 40, 41, 42, 43 phase engineering,44, 45, 46, 47, 48 and heteroatom doping49, 50, 51 to increase the number or enhance the intrinsic activity of active sites. However, little work has been reported to improve the HER activities of MoS 2 ‐based materials in alkaline media 31, 52.…”

Section: Introductionmentioning

confidence: 99%

Nickel Hydr(oxy)oxide Nanoparticles on Metallic MoS₂ Nanosheets: A Synergistic Electrocatalyst for Hydrogen Evolution Reaction

2017

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Molybdenum disulfide (MoS2)‐based materials have been recently identified as promising electrocatalysts for hydrogen evolution reaction (HER). However, little work has been done to improve the catalytic performance of MoS2 toward HER in alkaline electrolytes, which is more suitable for water splitting in large‐scale applications. Here, it is reported that the hybridization of 0D nickel hydr(oxy)oxide nanoparticles with 2D metallic MoS2 nanosheets can significantly enhance the HER activities in alkaline and neutral electrolytes. Impressively, the optimized hybrid catalyst can drive a cathodic current density of 10 mA cm−2 at an overpotential of ≈73 mV for HER in 1 m KOH, about 185 mV smaller than the original MoS2. The improved HER activity is attributed to a bifunctional mechanism adopted in these hybrid catalysts, in which nickel hydr(oxy)oxide promotes the water adsorption and dissociation to supply protons for subsequent reactions occurred on MoS2 to generate H2.

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Core–shell MoO₃–MoS₂ Nanowires for Hydrogen Evolution: A Functional Design for Electrocatalytic Materials

Cited by 1,112 publications

References 60 publications

A selective and efficient electrocatalyst for carbon dioxide reduction

A selective and efficient electrocatalyst for carbon dioxide reduction

Nanostructured hydrotreating catalysts for electrochemical hydrogen evolution

Nickel Hydr(oxy)oxide Nanoparticles on Metallic MoS₂ Nanosheets: A Synergistic Electrocatalyst for Hydrogen Evolution Reaction

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Core–shell MoO3–MoS2 Nanowires for Hydrogen Evolution: A Functional Design for Electrocatalytic Materials

Cited by 1,112 publications

References 60 publications

A selective and efficient electrocatalyst for carbon dioxide reduction

A selective and efficient electrocatalyst for carbon dioxide reduction

Nanostructured hydrotreating catalysts for electrochemical hydrogen evolution

Nickel Hydr(oxy)oxide Nanoparticles on Metallic MoS2 Nanosheets: A Synergistic Electrocatalyst for Hydrogen Evolution Reaction

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Product

Resources

About

Core–shell MoO₃–MoS₂ Nanowires for Hydrogen Evolution: A Functional Design for Electrocatalytic Materials

Nickel Hydr(oxy)oxide Nanoparticles on Metallic MoS₂ Nanosheets: A Synergistic Electrocatalyst for Hydrogen Evolution Reaction