Efficient Overall Water-Splitting Electrocatalysis Using Lepidocrocite VOOH Hollow Nanospheres

Huanhuan Shi, Hanfeng Liang, Fangwang Ming, Zhoucheng Wang

Research output: Contribution to journalArticlepeer-review

158 Scopus citations

Abstract

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.
Original languageEnglish (US)
Pages (from-to)573-577
Number of pages5
JournalAngewandte Chemie International Edition
Volume56
Issue number2
DOIs
StatePublished - Nov 29 2016

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