Wang Wenbin, Xu Ruidong, Yu Bohao, Wang Xuanbin, Feng Suyang
Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology Kunming 650093 China
State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Kunming 650093 China.
RSC Adv. 2019 Oct 9;9(55):31979-31987. doi: 10.1039/c9ra05343c. eCollection 2019 Oct 7.
Electrochemical decomposition of water to produce oxygen (O) and hydrogen (H) through an anodic oxygen evolution reaction (OER) and a cathodic hydrogen evolution reaction (HER) is a promising green method for sustainable energy supply. Here, we demonstrate that cauliflower-like S-doped iron microsphere films are materials that can efficiently decompose water as an electrocatalyst for the oxygen evolution reaction. FeS films are prepared by a simple one-step electrodeposition method and directly grow on copper foam from a deep eutectic solvent, ethaline (mixture of choline chloride and ethylene glycol), as a durable and highly efficient catalyst for the OER in 1.0 M KOH. The prepared FeS /CF, as an oxygen-evolving anode, shows remarkable catalytic performance toward the OER with a moderate Tafel slope of 105 mV dec, and require an overpotential of only 340 mV to drive a geometrical catalytic current density of 10 mA cm. In addition, this catalyst also demonstrates strong long-term electrochemical durability. This study provides a simple synthesis route for practical applications of limited transition metal nano catalysts.
通过阳极析氧反应（OER）和阴极析氢反应（HER）将水电化学分解以产生氧气（O）和氢气（H），是一种很有前景的可持续能源供应绿色方法。在此，我们证明了菜花状硫掺杂铁微球薄膜是一种能够作为析氧反应的电催化剂有效分解水的材料。FeS薄膜通过简单的一步电沉积法制备，并直接在泡沫铜上从深共熔溶剂乙胆碱（氯化胆碱和乙二醇的混合物）中生长，作为在1.0 M KOH中用于OER的耐用且高效的催化剂。制备的FeS/CF作为析氧阳极，对OER表现出显著的催化性能，其Tafel斜率适中，为105 mV dec，驱动几何催化电流密度为10 mA cm仅需340 mV的过电位。此外，这种催化剂还表现出很强的长期电化学耐久性。本研究为有限过渡金属纳米催化剂的实际应用提供了一种简单的合成路线。
