A cobalt-borate nanosheet array: an efficient and durable non-noble-metal electrocatalyst for water oxidation at near neutral pH

作者：Yang, Libin; Liu, Danni; Hao, Shuai; Kong, Rongmei; Asiri, Abdullah M.; Zhang, Chengxiao^*; Sun, Xuping^*

来源：Journal of Materials Chemistry A, 2017, 5(16): 7305-7308.

DOI：10.1039/c7ta00982h

• OXYGEN-EVOLVING CATALYST
• GENERATING HYDROGEN
• EVOLUTION
• PHOSPHATE
• NANOARRAY
• ELECTRODE

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 alpha-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 10mA 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.

• 出版日期2017-4-28
• 单位四川大学; 曲阜师范大学; 陕西师范大学