A cobalt-borate nanosheet array: an efficient and durable non-noble-metal electrocatalyst for water oxidation at near neutral pH. Issue 16 (6th April 2017)

• Record Type: Journal Article
• Authors: Yang, Libin; Liu, Danni; Hao, Shuai; Kong, Rongmei; Asiri, Abdullah M.; Zhang, Chengxiao; Sun, Xuping
• Is Part Of: Journal of materials chemistry. Volume 5:Issue 16(2017)
• Page Start: 7305
• Page End: 7308
• Publication Date: 2017-04-06
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c7ta00982h
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : As a durable catalyst electrode, a cobalt-borate nanosheet array on a Ti mesh shows high activity for water oxidation in 0.1 M K-Bi (pH: 9.2), achieving a geometrical catalytic current density of 10 mA cm −2 at an overpotential of 469 mV. Abstract : Exploitation of efficient water oxidation electrocatalysts under benign conditions is of great importance but remains a huge challenge. In this communication, we report the preparation of a cobalt-borate nanosheet array on a Ti mesh (Co-Bi/Ti) successfully converted from an electrodeposited α-Co(OH)2 nanosheet array in potassium borate (K-Bi) via in situ electrochemical tuning. The Co-Bi/Ti shows high electrocatalytic activity toward water oxidation with an overpotential of 469 mV to achieve a current density of 10 mA cm −2 in 0.1 M K-Bi, with long-term electrochemical stability with a turnover frequency of 0.15 s −1 at an overpotential of 600 mV.