Molybdenum Carbide Nanoparticles on Carbon Nanotubes and Carbon Xerogel: Low‐Cost Cathodes for Hydrogen Production by Alkaline Water Electrolysis | Zendy

Šljukić Biljana | Zendy; Santos Diogo M. F. | Zendy; Vujković Milica | Zendy; Amaral Luís | Zendy; Rocha Raquel P. | Zendy; Sequeira César A. C. | Zendy; Figueiredo José L. | Zendy

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Molybdenum Carbide Nanoparticles on Carbon Nanotubes and Carbon Xerogel: Low‐Cost Cathodes for Hydrogen Production by Alkaline Water Electrolysis

Author(s) -

Šljukić Biljana,

Santos Diogo M. F.,

Vujković Milica,

Amaral Luís,

Rocha Raquel P.,

Sequeira César A. C.,

Figueiredo José L.

Publication year - 2016

Publication title -

chemsuschem

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.412

H-Index - 157

eISSN - 1864-564X

pISSN - 1864-5631

DOI - 10.1002/cssc.201501651

Subject(s) - tafel equation , carbon nanotube , electrolysis , hydrogen production , electrolyte , materials science , electrolysis of water , cyclic voltammetry , aqueous solution , carbon fibers , electrochemistry , inorganic chemistry , nanoparticle , carbide , hydrogen , molybdenum , chemical engineering , chemistry , electrode , nanotechnology , metallurgy , composite material , organic chemistry , composite number , engineering

Low‐cost molybdenum carbide (Mo 2 C) nanoparticles supported on carbon nanotubes (CNTs) and on carbon xerogel (CXG) were prepared and their activity for the hydrogen evolution reaction (HER) was evaluated in 8 m KOH aqueous electrolyte at 25–85 °C. Measurements of the HER by linear scan voltammetry allowed us to determine Tafel slopes of 71 and 74 mV dec −1 at 25 °C for Mo 2 C/CNT and Mo 2 C/CXG, respectively. Stability tests were also performed, which showed the steady performance of the two electrocatalysts. Moreover, the HER kinetics at Mo 2 C/CNT was enhanced significantly after the long‐term stability tests. The specific activity of both materials was high, and a higher stability was obtained for the activated Mo 2 C/CNT (40 A g −1 at −0.40 V vs. the reversible hydrogen electrode).

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