A Molecular Ni-complex Containing Tetrahedral Nickel Selenide Core as Highly Efficient Electrocatalyst for Water Oxidation.
We report the highly efficient catalytic activity of a transition metal selenide-based coordination complex, [Ni{(SePiPr2)2N}2], (1) for oxygen evolution and hydrogen evolution reactions (OER and HER, respectively) in alkaline solution. Very low overpotentials of 200 mV and 310 mV were required to achieve 10 mA cm-2for OER and HER, respectively. The overpotential for OER is one of the lowest that has been reported up to now, making this one of the best OER electrocatalysts. In addition, this molecular complex exhibits an exceptionally high mass activity (111.02 A g-1) and a much higher TOF value (0.26 s-1) at a overpotential of 300 mV. This bifunctional electrocatalyst enables water electrolysis in alkaline solutions at a cell voltage of 1.54 V.
Department of Chemistry, Missouri University of Science & Technology, Rolla, MO, 65409, USA.
Jahangir
J
Masud
Inorganic Chemistry Laboratory, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis, 15771, Athens, Greece.
Polydoros-Chrysovalantis
PC
Ioannou
Inorganic Chemistry Laboratory, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis, 15771, Athens, Greece.
Nikolaos
N
Levesanos
Inorganic Chemistry Laboratory, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis, 15771, Athens, Greece.
Panayotis
P
Kyritsis
Department of Chemistry, Missouri University of Science & Technology, Rolla, MO, 65409, USA.
Manashi
0000-0002-5058-5313
M
Nath
D004563:Electrochemistry; D006859:Hydrogen / Q000737:chemistry; D008958:Models, Molecular; D008968:Molecular Conformation; D009532:Nickel / Q000737:chemistry*; D009942:Organometallic Compounds / Q000737:chemistry*; D010084:Oxidation-Reduction; D012643:Selenium / Q000737:chemistry*; D014867:Water / Q000737:chemistry*
D009942:Organometallic Compounds; D014867:Water; D009532:Nickel; D006859:Hydrogen; D012643:Selenium
electrocatalysis; hydrogen evolution; oxygen evolution; selenides; water splitting