当前位置: X-MOL 学术Adv. Mater. Interfaces › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
An Efficient Family of Misfit‐Layered Calcium Cobalt Oxide Catalyst for Oxygen Evolution Reaction
Advanced Materials Interfaces ( IF 5.4 ) Pub Date : 2018-10-16 , DOI: 10.1002/admi.201801281
Xiao Lin 1, 2 , Hongliang Bao 1 , Dehua Zheng 3 , Jing Zhou 1 , Guoping Xiao 1 , Chengzhi Guan 1, 2 , Linjuan Zhang 1 , Jian‐Qiang Wang 1
Affiliation  

The oxygen evolution reaction's (OER) poor kinetics is a considerable obstacle to overcome in the development of water‐derived hydrogen fuel. Research into OER catalysts using earth abundant elements is required to achieve desirable catalytic efficiency. Herein, a selection of misfit‐layered calcium cobaltite and transition metal (Mn, Fe, and Cu)‐doped compounds are synthesized and investigated in order to evaluate their potential as OER catalysts in an alkaline environment. It is discovered that Ca3Co4O9 OER activity may be substantially improved through incorporation of Fe, exhibiting low overpotential (331 mV) at 10 mA cm−2 current density, small Tafel slope of 52 mV dec−1, and an exceptional long‐term stability of electrolysis in 1 m KOH alkaline solution >100 h. Moreover, all materials used are systematically studied using a variety of characterization techniques, resulting in enhanced activity, which is attributed to the enhanced electrical conductivity, and optimized proportion of Co (III) and Co (IV), as well as the synergistic effect between Fe with Co.

中文翻译:

高效的错配层状氧化钴氧化钙催化剂,用于析氧反应

氧气析出反应(OER)的动力学很差,这是开发水源氢燃料时要克服的一大障碍。为了获得理想的催化效率,需要对使用富含稀土元素的OER催化剂进行研究。在此,合成并研究了一系列错配层状的钴酸钙和过渡金属(Mn,Fe和Cu)掺杂的化合物,以评估其在碱性环境中作为OER催化剂的潜力。发现Ca 3 Co 4 O 9 OER活性可以通过掺入Fe来显着改善,在10 mA cm -2的电流密度下表现出较低的过电位(331 mV),Tafel斜率较小,为52 mV dec -1,以及在大于100小时的1 m KOH碱性溶液中具有出色的长期电解稳定性。此外,使用各种表征技术对所有使用的材料进行了系统研究,从而提高了活性,这归因于提高的电导率,优化的Co(III)和Co(IV)比例以及两者之间的协同效应。铁配有限公司
更新日期:2018-10-16
down
wechat
bug