Adjustable antiperovskite cobalt-based nitrides as efficient electrocatalysts for overall water splitting. Issue 29 (7th July 2022)

• Record Type: Journal Article
• Authors: Zhu, Lili; Li, Changdian; Li, Han; Li, Hui; Wu, Ziqiang; Huang, Yanan; Zhu, Xuebin; Sun, Yuping
• Is Part Of: Journal of materials chemistry. Volume 10:Issue 29(2022)
• Page Start: 15520
• Page End: 15527
• Publication Date: 2022-07-07
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d2ta03313e
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : Co-based antiperovskite nitrides (CuNCo3 /NF and CoN0.73 Co3 /NF) for overall water splitting are designed. An alkaline electrolyzer composed of CuNCo3 /NF and CoN0.73 Co3 /NF has low cell voltage of 1.53 V at 10 mA cm −2 and maintains remarkable stability. Abstract : Exploring effective, stable and low-cost catalysts for overall water splitting, comprising the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), is always a prosperous topic in the electrochemical water splitting field. ANCo3, a typical class of antiperovskite nitrides, in which both the A site and N content can be effectively modulated, is considered a promising class of catalysts for overall water splitting. Here, we report the overall water splitting results of Co-based antiperovskite nitrides for the first time. CuNCo3 nanosheets and CoN0.73 Co3 nanowires on nickel foam (NF) are designed as OER and HER catalysts, respectively. The alkaline electrolyzer of CuNCo3 /NF||CoN0.73 Co3 /NF for overall water splitting exhibits a low cell voltage of 1.53 V at 10 mA cm −2 with high cycling stability. The results explore the applications of antiperovskite nitrides for overall water splitting and provide strategic guidance for the design of efficient catalyst materials.