Imidazolate-mediated assembled structures of Co-LDH sheets for efficient electrocatalytic oxygen evolution. Issue 11 (2nd March 2018)

• Record Type: Journal Article
• Authors: Chen, Liyong; Guo, Yuting; Wang, Huifang; Gu, Zhizhi; Zhang, Yingyue; Li, Xuezhao; Wang, Hong; Duan, Chunying
• Is Part Of: Journal of materials chemistry. Volume 6:Issue 11(2018)
• Page Start: 4636
• Page End: 4641
• Publication Date: 2018-03-02
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c7ta11078b
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : To fully achieve an eco-friendly means of storing electricity in the form of chemical fuels, the development of a green synthetic route towards highly active oxygen evolution reaction (OER) electrocatalysts is required. Abstract : To fully achieve an eco-friendly means of storing electricity in the form of chemical fuels, the development of a green synthetic route to highly active oxygen evolution reaction (OER) electrocatalysts is required. In this work, imidazolate-induced production of cobalt layered double hydroxide (Co-LDH) electrocatalysts with different assembled structures is presented. Porous Co-LDHs exhibit a remarkable OER catalytic performance with a low overpotential of η 10 = 312 mV, while cage-like Co-LDHs prepared by the transformation of ZIF-67 show a slightly inferior performance. Such a phenomenon is attributed to the assembled structure difference, giving rise to a difference in electron transfer and mass transport as well as the number of accessible active sites. After disassembly, these disperse Co-LDH sheets give a similar catalytic performance ( η 10 : 288–290 mV) due to bearing similar components. Importantly, the reversible/cycling transformation between Co-LDHs and ZIF-67 provides an effective method to radically reduce pollutant release and resource consumption, from the point of view of material synthesis.