A bimetallic Co 4 Mo 8 cluster built from Mo 8 oxothiomolybdate capped by a Co 4 -thiacalix[4]arene unit: The observation of the Co-Mo synergistic effect for binder-free electrocatalysts

Min Zhang, Mengwei Chen, Yanfeng Bi, Liangliang Huang, Kun Zhou, Zhiping Zheng

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

A new calixarene-supported bimetallic coordination cluster (NH 4 ){Co 4 II (TC4A)Cl[(Mo V O 2 ) 2 S(CH 3 O)] 4 } (+solvent) (abbr. Co 4 Mo 8 , H 4 TC4A = p-tert-butylthiacalix[4]arene) was obtained by a solvothermal reaction. Co 4 Mo 8 features a sulfur modified polyoxometalate Mo 8 cluster capped by a Co 4 -TC4A unit. Co 4 Mo 8 clusters directly fabricated on nickel foam (NF) were used as working electrodes, giving drastically improved electrocatalytic activities for the oxygen evolution reaction (OER) with an overpotential of 302.8 mV at 10.0 mA cm -2 in basic media. Upon replacing Co in Co 4 Mo 8 clusters with Ni or Zn, component controlled investigations indicated that the extraordinary OER performance originated from the Co-Mo synergistic effect. Furthermore, the deliberately incorporated sulfur atoms at the lower rim of Co 4 Mo 8 clusters facilitated the adherence between the clusters and NF, resulting in a binder-free electrocatalyst with efficient and ultra-stable OER performance (366.8 mV at 40.0 mA cm -2 for more than 150 hours).

Original languageEnglish (US)
Pages (from-to)12893-12899
Number of pages7
JournalJournal of Materials Chemistry A
Volume7
Issue number20
DOIs
StatePublished - Jan 1 2019
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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