Ultrafine α-Phase Molybdenum Carbide Decorated with Platinum Nanoparticles for Efficient Hydrogen Production in Acidic and Alkaline Media

Hee Jo Song; Myeong Chang Sung; Hyunseok Yoon; Bobae Ju; Dong Wan Kim

doi:10.1002/advs.201802135

Ultrafine α-Phase Molybdenum Carbide Decorated with Platinum Nanoparticles for Efficient Hydrogen Production in Acidic and Alkaline Media

Hee Jo Song, Myeong Chang Sung, Hyunseok Yoon, Bobae Ju, Dong Wan Kim

Research output: Contribution to journal › Article › peer-review

73 Citations (Scopus)

Abstract

The development of efficient electrocatalysts is important to produce clean and sustainable hydrogen fuel on a large scale. With respect to cathodic reactions, Pt exhibits an overwhelming electrocatalytic capability in the hydrogen evolution reaction (HER) in comparison with other earth-abundant electrocatalysts, despite its rarity and high cost. So, a hybrid catalyst that combines a low-cost electrocatalyst with Pt would balance cost-effectiveness with catalytic activity. Herein, α-phase molybdenum carbide (MoC₁₋_x) nanoparticles (NPs) decorated with a small amount of Pt (MoC₁₋_x/Pt-NPs) are designed to achieve high-performance hydrogen production in acidic and alkaline media. MoC₁₋_x-NPs exhibit good electrocatalytic HER activity as well as stability and durability. They show favorable catalytic kinetics in an alkaline medium, suggesting an active water dissociation process. After Pt decoration, Pt-NPs that are 2–3 nm in diameter are well incorporated with MoC₁₋_x-NPs. MoC₁₋_x/Pt-NPs with a small amount of Pt (2.7–3 wt%) and are able to perform superior electrocatalytic HER activity, and possess stability and durability that is comparable to that of commercial Pt/C. Notably, they exhibit a higher intrinsic catalytic activity compared to that of Pt/C in an alkaline medium, indicating that they promote the sluggish catalytic kinetics of Pt in alkaline medium.

Original language	English
Article number	1802135
Journal	Advanced Science
Volume	6
Issue number	8
DOIs	https://doi.org/10.1002/advs.201802135
Publication status	Published - 2019 Apr 17

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) Grant funded by the Ministry of Science, ICT, and Future Planning, South Korea (NRF-2016M3A7B4909318).

Publisher Copyright:
© 2019 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Keywords

electrocatalysts
hydrogen evolution reaction
nanoparticles
platinum
α-MoC

ASJC Scopus subject areas

Medicine (miscellaneous)
General Chemical Engineering
Biochemistry, Genetics and Molecular Biology (miscellaneous)
General Materials Science
General Engineering
General Physics and Astronomy

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1002/advs.201802135

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title = "Ultrafine α-Phase Molybdenum Carbide Decorated with Platinum Nanoparticles for Efficient Hydrogen Production in Acidic and Alkaline Media",

abstract = "The development of efficient electrocatalysts is important to produce clean and sustainable hydrogen fuel on a large scale. With respect to cathodic reactions, Pt exhibits an overwhelming electrocatalytic capability in the hydrogen evolution reaction (HER) in comparison with other earth-abundant electrocatalysts, despite its rarity and high cost. So, a hybrid catalyst that combines a low-cost electrocatalyst with Pt would balance cost-effectiveness with catalytic activity. Herein, α-phase molybdenum carbide (MoC1−x) nanoparticles (NPs) decorated with a small amount of Pt (MoC1−x/Pt-NPs) are designed to achieve high-performance hydrogen production in acidic and alkaline media. MoC1−x-NPs exhibit good electrocatalytic HER activity as well as stability and durability. They show favorable catalytic kinetics in an alkaline medium, suggesting an active water dissociation process. After Pt decoration, Pt-NPs that are 2–3 nm in diameter are well incorporated with MoC1−x-NPs. MoC1−x/Pt-NPs with a small amount of Pt (2.7–3 wt%) and are able to perform superior electrocatalytic HER activity, and possess stability and durability that is comparable to that of commercial Pt/C. Notably, they exhibit a higher intrinsic catalytic activity compared to that of Pt/C in an alkaline medium, indicating that they promote the sluggish catalytic kinetics of Pt in alkaline medium.",

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note = "Funding Information: This work was supported by the National Research Foundation of Korea (NRF) Grant funded by the Ministry of Science, ICT, and Future Planning, South Korea (NRF-2016M3A7B4909318). Publisher Copyright: {\textcopyright} 2019 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim",

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AU - Ju, Bobae

AU - Kim, Dong Wan

N1 - Funding Information: This work was supported by the National Research Foundation of Korea (NRF) Grant funded by the Ministry of Science, ICT, and Future Planning, South Korea (NRF-2016M3A7B4909318). Publisher Copyright: © 2019 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

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N2 - The development of efficient electrocatalysts is important to produce clean and sustainable hydrogen fuel on a large scale. With respect to cathodic reactions, Pt exhibits an overwhelming electrocatalytic capability in the hydrogen evolution reaction (HER) in comparison with other earth-abundant electrocatalysts, despite its rarity and high cost. So, a hybrid catalyst that combines a low-cost electrocatalyst with Pt would balance cost-effectiveness with catalytic activity. Herein, α-phase molybdenum carbide (MoC1−x) nanoparticles (NPs) decorated with a small amount of Pt (MoC1−x/Pt-NPs) are designed to achieve high-performance hydrogen production in acidic and alkaline media. MoC1−x-NPs exhibit good electrocatalytic HER activity as well as stability and durability. They show favorable catalytic kinetics in an alkaline medium, suggesting an active water dissociation process. After Pt decoration, Pt-NPs that are 2–3 nm in diameter are well incorporated with MoC1−x-NPs. MoC1−x/Pt-NPs with a small amount of Pt (2.7–3 wt%) and are able to perform superior electrocatalytic HER activity, and possess stability and durability that is comparable to that of commercial Pt/C. Notably, they exhibit a higher intrinsic catalytic activity compared to that of Pt/C in an alkaline medium, indicating that they promote the sluggish catalytic kinetics of Pt in alkaline medium.

AB - The development of efficient electrocatalysts is important to produce clean and sustainable hydrogen fuel on a large scale. With respect to cathodic reactions, Pt exhibits an overwhelming electrocatalytic capability in the hydrogen evolution reaction (HER) in comparison with other earth-abundant electrocatalysts, despite its rarity and high cost. So, a hybrid catalyst that combines a low-cost electrocatalyst with Pt would balance cost-effectiveness with catalytic activity. Herein, α-phase molybdenum carbide (MoC1−x) nanoparticles (NPs) decorated with a small amount of Pt (MoC1−x/Pt-NPs) are designed to achieve high-performance hydrogen production in acidic and alkaline media. MoC1−x-NPs exhibit good electrocatalytic HER activity as well as stability and durability. They show favorable catalytic kinetics in an alkaline medium, suggesting an active water dissociation process. After Pt decoration, Pt-NPs that are 2–3 nm in diameter are well incorporated with MoC1−x-NPs. MoC1−x/Pt-NPs with a small amount of Pt (2.7–3 wt%) and are able to perform superior electrocatalytic HER activity, and possess stability and durability that is comparable to that of commercial Pt/C. Notably, they exhibit a higher intrinsic catalytic activity compared to that of Pt/C in an alkaline medium, indicating that they promote the sluggish catalytic kinetics of Pt in alkaline medium.

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Ultrafine α-Phase Molybdenum Carbide Decorated with Platinum Nanoparticles for Efficient Hydrogen Production in Acidic and Alkaline Media

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

UN SDGs

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