Bi Songhu, Li Jingde, Zhong Qin, Chen Chuntan, Zhang Qiyi, Yao Yongyi
School of Chemical Engineering, Sichuan University Chengdu Sichuan 610065 P. R. China
Textile College, Sichuan University Chengdu Sichuan 610065 P. R. China.
RSC Adv. 2018 Jun 21;8(40):22799-22805. doi: 10.1039/c8ra02959h. eCollection 2018 Jun 19.
The development of electrocatalysts for the Oxygen Evolution Reaction (OER) requires extensive and challenging research for the water splitting and fuel cell applications. Herein, we report a low-cost CoFeO/biomass carbon (CFO@BC/Zn) hybrid from Co-enriched Sulfate Reducing Bacteria (Co-SRB) as an electrocatalyst for OER. The electrocatalyst exhibits a low potential of 1.53 V at a current density 10 mA cm and Tafel slope of 86 mV dec. This method does not require high-cost or long periods of preparation. The density-functional theory (DFT) calculations show a small barrier for oxygen conversion on Fe of CFO (100) surface. The synthesis of CFO@BC/Zn may be a new approach for obtaining low-priced electrocatalysts for OER.
用于析氧反应（OER）的电催化剂的开发对于水分解和燃料电池应用而言需要进行广泛且具有挑战性的研究。在此，我们报道了一种由富钴硫酸盐还原菌（Co-SRB）制备的低成本CoFeO/生物质碳（CFO@BC/Zn）复合材料作为OER的电催化剂。该电催化剂在电流密度为10 mA cm时具有1.53 V的低电位以及86 mV dec的塔菲尔斜率。此方法不需要高成本或长时间的制备。密度泛函理论（DFT）计算表明在CFO（100）表面的Fe上氧转化的能垒较小。CFO@BC/Zn的合成可能是获得用于OER的低价电催化剂的一种新方法。
