Turning Ni-based hydroxide into an efficient hydrogen evolution electrocatalyst by fluoride incorporation
By Zhang, Bowei; Hu, Shan
Published in Electrochemistry Communications
2018
Abstract
The use of Ni-based oxides/hydroxides in the oxygen evolution reaction has been extensively reported and fluoride precursors have frequently been used in their synthesis. However, there have been no studies of the effect of fluoride in Ni-based oxides/hydroxides on the hydrogen evolution reaction (HER) as these materials are generally considered inactive for HER. Recently the {HER} activities of Ni-based oxides/hydroxides have been improved by doping with anions (P, S, and Se). However, these compounds are chemically unstable during {HER} and can be converted into the corresponding oxides/hydroxides. In this paper we discovered an interesting phenomenon: the NiFe hydroxide can be turned into an active {HER} material by incorporating fluoride into it. In 1 M KOH, a significant shift of 91 mV was observed in the {HER} overpotential at ? 10 mA/cm2 due to the enhanced charge transfer ability triggered by fluoride. This discovery provides a new approach to turning normally inactive materials, whose catalytic activity is hindered by low intrinsic conductivity, into electrocatalysts, and will lead to the discovery of new catalysts.
Microsoft is Ending Support for Windows 7
Microsoft will discontinue support for Windows 7 on January 14, 2020 which means Gamry will also be discontinuing support for Windows 7. If you are upgrading to Windows 10, like many companies and institutions, you need to be running Version 7 of our s oftware . Please note that only USB and Ethernet-based instruments can run in Version 7. Eligible users can download the latest version of our software through our online Client Portal .
If you haven't already registered your instrument, you can do so through the Client Portal .
Please email Technical Support if you have any questions regarding this transition. Please be sure to include your instrument model and serial number when contacting us.