Article History
Received: 4 April 2016
Accepted: 22 June 2016
First Online: 9 August 2016
Competing interests
: A priority patent application on the synthesis and application of NiFeSe<sub>2</sub> has been filed by EPFL; EP Patent Application Nr 16180605.4, ‘New catalysts for oxygen evolution reaction’. The inventors of the patent application are authors F.S. and X.H. The remaining author declares no competing financial interests.