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β-Mo2C Nanoparticle...
β-Mo2C Nanoparticles Produced by Carburization of Molybdenum Oxides with Carbon Black under Microwave Irradiation for Electrocatalytic Hydrogen Evolution Reaction
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- Fan, Junpeng (författare)
- Umeå universitet,Institutionen för fysik,Division of Functional Materials and Nanodevices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, China
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- Wu, Xiuyu (författare)
- Umeå universitet,Institutionen för fysik
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- Piñeiro-García, Alexis (författare)
- Umeå universitet,Institutionen för fysik
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- Boulanger, Nicolas (författare)
- Umeå universitet,Institutionen för fysik
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- Panecatl-Bernal, Yesmin (författare)
- Universidad Interserrana Del Estado de Puebla-Ahuacatlán San Andrés Tlayehualancingo, Puebla, Mexico
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- Ashok, Anumol (författare)
- Stockholms universitet,Institutionen för material- och miljökemi (MMK),Department of Materials and Environmental Chemistry, Stockholm University, Stockholm, Sweden
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- Koroidov, Sergey (författare)
- Stockholms universitet,Fysikum,Department of Physics, Stockholm University, Stockholm, Sweden
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Gracia-Espino, Eduardo (författare)
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(creator_code:org_t)
- 2021-11-13
- 2021
- Engelska.
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Ingår i: ACS Applied Nano Materials. - : American Chemical Society (ACS). - 2574-0970. ; 4:11, s. 12270-12277
- Relaterad länk:
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https://doi.org/10.1...
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https://pubs.acs.org...
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https://umu.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- The synthesis of electrochemically active β-Mo2C nanoparticles for hydrogen production was achieved by a fast and energy-efficient microwave-assisted carburization process from molybdenum oxides and carbon black. With the use of microwave-based production methods, we aim to reduce the long-time high-temperature treatments and the use of hazardous gases often seen in traditional molybdenum carbide synthesis processes. In our process, carbon black not only serves as a carbon source but also as a susceptor (microwave absorber) and conductive substrate. The irradiation power, reaction time, and Mo:C ratio were optimized to achieve the highest electrocatalytic performance toward hydrogen production in an acidic electrolyte. A complete transformation of MoO3 to β-Mo2C nanoparticles and an additional graphitization of the carbon black matrix were achieved at 1000 W, 600 s, and Mo:C ratio above 1:7.5. Under these conditions, the optimized composite exhibited an excellent HER performance (η10 = 156 mV, Tafel slope of 53 mV·dec–1) and large turnover frequency per active site (3.09 H2·s–1 at an overpotential of 200 mV), making it among the most efficient non-noble-metal catalysts. The excellent activity was achieved thanks to the abundance of β-Mo2C nanoparticles, the intimate nanoparticle-substrate interface, and enhanced electron transport toward the carbon black matrix. We also investigated the flexibility of the synthesis method by adding additional Fe or V as secondary transition metals, as well as the effect of the substrate.
Ämnesord
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Nyckelord
- microwave irradiation
- molybdenum carbide
- nanoparticles
- hydrogen evolution reaction
- iron
- vanadium
- doping
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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