摘要
氧析出反应(OER)涉及多个电子的转移,动力学较为缓慢,被认为是电解水过程的瓶颈半反应。因此开发高效、稳定的氧析出反应电催化剂,降低该反应的外加过电位是电解水技术发展的关键。本文采用简单的化学浴沉积方法,经低温焙烧成功制备出多孔的无定型NiCo氧化物催化剂,并且该方法一次制备量可达克级。无定型NiCo氧化物因富含氧空位相对于其晶态的NiCo2O4尖晶石复合氧化物具有更优的OER性能,在碱性介质(0.1 mol/L KOH)中当电流密度为10 mA/cm2时的过电位为370 mV,并且表现出优异的催化稳定性。
Oxygen evolution reaction(OER)is considered as the bottleneck half reaction in water splitting,owing to it involves transfer of multiple electrons and the kinetics is slow.Therefore,the development of efficient and stable electrocatalysts for OER and the reduction of the applied overpotential are the key to the development of water splitting technology.In this work,porous amorphous NiCo oxide catalyst for OER was fabricated by simple chemical bath deposition and low-temperature roasting method,using this preparation method,yielding amorphous NiCo oxide with quality up to gram level.Amorphous NiCo oxide exhibites excellent OER performance than its crystalline counterpart NiCo2O4 spinel oxide due to its oxygen vacancy.The holey amorphous NiCo oxide exhibites a low overpotential of 370 mV at current density of 10 mA/cm2 and excellent stability in 0.1 mol/L KOH while maintains remarkable durability.
作者
赵静
何晓燕
ZHAO Jing;HE Xiaoyan(Xinjiang Laboratory of Phase Transitions and Microstructure in Condense Matters Physics, College of Physical Science and Technology, Yili Normal University, Yining 835000, China)
出处
《人工晶体学报》
EI
CAS
北大核心
2020年第5期896-901,907,共7页
Journal of Synthetic Crystals
基金
伊犁师范大学2020年度校级科研项目。
关键词
氧析出反应
无定型氧化物
氧空位
电催化性能
oxygen evolution reaction(OER)
amorphous oxide
oxygen vacancy
electrocatalytic property
