Zhou Dan, He Liangbo, Zhang Rong, Hao Shuai, Hou Xiandeng, Liu Zhiang, Du Gu, Asiri Abdullah M, Zheng Chengbin, Sun Xuping
College of Chemistry, Sichuan University, Chengdu, 610064, Sichuan, P. R. China.
Analytical & Test Center, Sichuan University, Chengdu, 610064, Sichuan, P. R. China.
Chemistry. 2017 Nov 7;23(62):15601-15606. doi: 10.1002/chem.201703565. Epub 2017 Oct 18.
It is highly desirable to develop a simple, fast and straightforward method to boost the alkaline water oxidation of metal oxide catalysts. In this communication, we report our recent finding that the generation of amorphous Co-borate layer on Co O nanowire arrays supported on Ti mesh (Co O @Co-Bi NA/TM) leads to significantly boosted OER activity. The as-prepared Co O @Co-Bi NA/TM demands overpotential of 304 mV to drive a geometrical current density of 20 mA cm in 1.0 M KOH, which is 109 mV less than that for Co O NA/TM, with its catalytic activity being preserved for at least 20 h. It suggests that the existence of amorphous Co-Bi layer promotes more CoO (OH) generation on Co O surface.
开发一种简单、快速且直接的方法来提高金属氧化物催化剂的碱性水氧化性能是非常有必要的。在本通讯中，我们报告了我们最近的发现，即在钛网（CoO@Co-Bi NA/TM）上负载的CoO纳米线阵列上生成非晶态钴硼酸盐层会显著提高析氧反应（OER）活性。所制备的CoO@Co-Bi NA/TM在1.0 M KOH中驱动20 mA cm几何电流密度时需要304 mV的过电位，这比CoO NA/TM的过电位低109 mV，并且其催化活性至少保持20小时。这表明非晶态Co-Bi层的存在促进了CoO表面更多CoO(OH)的生成。
