Electrocatalytic CO2 reduction on earth abundant 2D Mo2C and Ti3C2 MXenes | Zendy

Nuwan H. Attanayake | Zendy; Huta Banjade | Zendy; Akila C. Thenuwara | Zendy; Babak Anasori | Zendy; Qimin Yan | Zendy; Daniel R. Strongin | Zendy

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Electrocatalytic CO₂ reduction on earth abundant 2D Mo₂C and Ti₃C₂ MXenes

Author(s) -

Nuwan H. Attanayake,

Huta Banjade,

Akila C. Thenuwara,

Babak Anasori,

Qimin Yan,

Daniel R. Strongin

Publication year - 2020

Publication title -

chemical communications

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.837

H-Index - 333

eISSN - 1364-548X

pISSN - 1359-7345

DOI - 10.1039/d0cc05822j

Subject(s) - mxenes , oxygen reduction reaction , reduction (mathematics) , earth (classical element) , materials science , oxygen , chemistry , crystallography , inorganic chemistry , physics , nanotechnology , electrochemistry , electrode , geometry , mathematics , mathematical physics , organic chemistry

Mo 2 C and Ti 3 C 2 MXenes were investigated as earth-abundant electrocatalyts for the CO 2 reduction reaction (CO 2 RR). Mo 2 C and Ti 3 C 2 exhibited faradaic efficiencies of 90% (250 mV overpotential) and 65% (650 mV overpotential), respectively, for the reduction of CO 2 o CO in acetonitrile using an ionic liquid electrolyte. The use of ionic liquid 1-ethyl-2-methylimidazolium tetrafluoroborate as an electrolyte in organic solvent suppressed the competing hydrogen evolution reaction. Density functional theory (DFT) calculations suggested that the catalytic active sites are oxygen vacancy sites on both MXene surfaces. Also, a spontaneous dissociation of adsorbed COOH species to a water molecule and adsorbed CO on Mo 2 C promote the CO 2 RR.

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