Shamraiz Umair, Badshah Amin, Raza Bareera
Department of Chemistry, Quaid-i-Azam University, Islamabad 45320, Pakistan.
Shanghai Electrochemical Energy Devices Research Center, School of Chemistry and Chemical Engineering, Shanghai Jiatong University, Shanghai 200240, China.
Langmuir. 2020 Mar 10;36(9):2223-2230. doi: 10.1021/acs.langmuir.9b03293. Epub 2020 Feb 25.
Two-dimensional oxyhydroxide materials are proved to be a potential candidate for oxygen evolution reaction (OER). Robust, efficient, and cost-effective electrocatalysts are critical to overcome the sluggish kinetics and high overpotential of OERs. Herein, a simple co-precipitation method followed by solvothermal treatment is used to synthesize Fe-doped α-CoOOH at higher pH under optimum conditions for OER. The α-FeCoOOH/NF illustrates superior OER electrocatalytic performance and requires an overpotential of only 280 mV to produce a current density of 50 mA cm with excellent stability. The detailed analysis reveals that the exceptional OER performance originates from thin nanorods and partially due to the replacement of Fe in α-CoOOH. This work illustrates the presence of interlayer chloride ions through energy-dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy.
二维羟基氧化物材料被证明是析氧反应（OER）的潜在候选材料。坚固、高效且具有成本效益的电催化剂对于克服OER缓慢的动力学和高过电位至关重要。在此，采用一种简单的共沉淀法并随后进行溶剂热处理，在较高pH值下于OER的最佳条件下合成Fe掺杂的α-CoOOH。α-FeCoOOH/NF表现出优异的OER电催化性能，仅需280 mV的过电位即可产生50 mA cm的电流密度，且具有出色的稳定性。详细分析表明，卓越的OER性能源于细纳米棒，部分原因是α-CoOOH中Fe的取代。这项工作通过能量色散X射线光谱和X射线光电子能谱说明了层间氯离子的存在。
