Premium
Efficient Overall Water‐Splitting Electrocatalysis Using Lepidocrocite VOOH Hollow Nanospheres
Author(s) -
Shi Huanhuan,
Liang Hanfeng,
Ming Fangwang,
Wang Zhoucheng
Publication year - 2017
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201610211
Subject(s) - water splitting , lepidocrocite , electrocatalyst , oxygen evolution , cathode , anode , materials science , chemical engineering , nanotechnology , cell voltage , current density , hydrogen , inorganic chemistry , catalysis , electrochemistry , chemistry , electrode , physics , organic chemistry , adsorption , photocatalysis , quantum mechanics , engineering , goethite , biochemistry
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 −2 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 −2 , making the VOOH hollow nanospheres an efficient alternative to water splitting.