A bimetallic Co4Mo8 cluster built from Mo8 oxothiomolybdate capped by a Co4-thiacalix[4]arene unit: the observation of the Co–Mo synergistic effect for binder-free electrocatalysts. Issue 20 (13th May 2019)

• Record Type: Journal Article
• Authors: Zhang, Min; Chen, Mengwei; Bi, Yanfeng; Huang, Liangliang; Zhou, Kun; Zheng, Zhiping
• Is Part Of: Journal of materials chemistry. Volume 7:Issue 20(2019)
• Page Start: 12893
• Page End: 12899
• Publication Date: 2019-05-13
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c9ta01603a
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : Fabricating Co4 -thiacalix[4]arene capped Mo8 oxothiomolybdate bimetallicCo4 Mo8 nanoclusters on nickel foam serves as efficient binder-free oxygen evolution reaction electrocatalyst with Co–Mo synergistic effect. Abstract : A new calixarene-supported bimetallic coordination cluster (NH4 ){Co4 II (TC4A)Cl[(Mo V O2 )2 S(CH3 O)]4 } (+solvent) (abbr.Co4 Mo8, H4 TC4A = p-tert -butylthiacalix[4]arene) was obtained by a solvothermal reaction.Co4 Mo8 features a sulfur modified polyoxometalate Mo8 cluster capped by a Co4 -TC4A unit.Co4 Mo8 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 inCo4 Mo8 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 ofCo4 Mo8 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).