多孔普鲁士蓝类似物的合成及电催化析氧性能

采用一种简单易行的共沉淀法合成了前驱体镍铁普鲁士蓝类似物NiFe-PBA（NF），然后通过溶剂热处理获得了镍铁普鲁士蓝纳米多孔材料（NFP）。通过XRD、SEM、TEM、XPS、BET及电化学方法对所得材料进行了结构表征和析氧性能测试。结果表明，NFP相对于前驱体NF，电化学比表面积增大、催化活性位点增多，电催化析氧反应（OER）性能显著提高。在浓度1 mol/L KOH水溶液中，达到10 mA/cm2电流密度时，NFP所需过电位仅为260 mV，比NF（320 mV）前驱体低18.75%，也优于大多数已报道的非贵金属催化剂和商用贵金属催化剂，显示出良好的应用前景。

Synthesis of Porous Prussian Blue Analogues and Electrocatalytic Properties for Oxygen Evolution Reaction

In this work, the precursor NiFe-PBA (NF) was synthesized by a facile coprecipitation method, and then the NiFe-PBA nano-porous material (NFP) was prepared by solvothermal treatment. XRD, SEM, TEM, XPS, BET and electrochemical methods were used to characterize the structure and test the oxygen evolution performance of the synthesized materials. Electrochemical measurement results showed that compared with the precursor NF, NFP exhibited significantly enhanced electrocatalytic performance of oxygen evolution reaction (OER) due to the increase of electrochemical surface area and catalytic active sites. In 1 mol/L KOH aqueous solution, the NFP required an overpotential of only 260 mV to afford the current density of 10 mA/cm2, 18.75% lower than that of the NF (320 mV) precursor, which also outperformed many previously-reported noble-metal-free electrocatalysts and commercial noble-metal-based catalysts, indicative of a promising prospect for application.