College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China.
Materials Science and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955, Saudi Arabia.
Angew Chem Int Ed Engl. 2017 Jan 9;56(2):573-577. doi: 10.1002/anie.201610211. Epub 2016 Nov 29.
Herein we report the control synthesis of lepidocrocite VOOH hollow nanospheres and further their applications in electrocatalytic water splitting for the first time. By tuning the surface area of the nanospheres, the optimal performance can be achieved with low overpotentials of 270 mV for the oxygen evolution reaction (OER) and 164 mV for the hydrogen evolution reaction (HER) at 10 mA cm in 1 m KOH, respectively. Furthermore, when used as both the anode and cathode for overall water splitting, a low cell voltage of 1.62 V is required to reach the current density of 10 mA cm , making the VOOH hollow nanospheres an efficient alternative to water splitting.
在此，我们报告了纤铁矿 VOOH 空心纳米球的控制合成，并首次将其应用于电催化水分解。通过调节纳米球的表面积，可以实现最佳性能，在 1 M KOH 中，析氧反应（OER）的过电位低至 270 mV，析氢反应（HER）的过电位低至 164 mV，电流密度为 10 mA cm时。此外，当用作整体水分解的阳极和阴极时，仅需 1.62 V 的低电池电压即可达到 10 mA cm 的电流密度，使得 VOOH 空心纳米球成为水分解的有效替代品。
