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A super-efficient cobalt catalyst for electrochemical hydrogen production from neutral water with 80 mV overpotential
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2014 (English)In: Energy & Environmental Science, ISSN 1754-5692, E-ISSN 1754-5706, Vol. 7, no 1, 329-334 p.Article in journal (Refereed) Published
Abstract [en]

Self-assembled molecular iron and cobalt catalysts (MP4N2, M = Fe, Co) bearing a multihydroxy-functionalized tetraphosphine ligand electrocatalyze H-2 generation from neutral water on a mercury electrode at -1.03 and -0.50 V vs. NHE, respectively. Complex CoP4N2 displays extremely low overpotential (E-onset = 80 mV) while maintaining high activity and good stability. Bulk electrolysis of CoP4N2 in a neutral phosphate buffer solution at -1.0 V vs. NHE produced 9.24 x 10(4) mol H-2 per mol cat. over 20 h, with a Faradaic efficiency close to 100% and without apparent deactivation.

Place, publisher, year, edition, pages
2014. Vol. 7, no 1, 329-334 p.
Keyword [en]
Bulk electrolysis, Cobalt Catalyst, Faradaic efficiencies, Good stability, Mercury electrodes, Phosphate buffer solutions, Self-assembled, Tetraphosphines
National Category
Energy Engineering Ecology
Identifiers
URN: urn:nbn:se:kth:diva-141066DOI: 10.1039/c3ee42194eISI: 000329550700020Scopus ID: 2-s2.0-84890525626OAI: oai:DiVA.org:kth-141066DiVA: diva2:695536
Funder
Swedish Research CouncilKnut and Alice Wallenberg Foundation
Note

QC 20140211

Available from: 2014-02-11 Created: 2014-02-07 Last updated: 2017-12-06Bibliographically approved

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Sun, Licheng

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