A Molecular Tetrahedral Cobalt–Seleno-Based Complex as an Efficient Electrocatalyst for Water Splitting |
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| Authors: | Ibrahim Munkaila Abdullahi Jahangir Masud Polydoros-Chrisovalantis Ioannou Eleftherios Ferentinos Panayotis Kyritsis Manashi Nath |
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| Institution: | 1.Department of Chemistry, Missouri University of Science & Technology, Rolla, MO 65409, USA;2.Electrochemical Process Development, Energy & Environmental Research Centre, Grand Forks, ND 58202, USA;3.Department of Chemistry, National and Kapodistrian University of Athens Panepistimiopolis, 15771 Athens, Greece; (P.-C.I.); (E.F.) |
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| Abstract: | The cobalt–seleno-based coordination complex, Co{(SePiPr2)2N}2], is reported with respect to its catalytic activity in oxygen evolution and hydrogen evolution reactions (OER and HER, respectively) in alkaline solutions. An overpotential of 320 and 630 mV was required to achieve 10 mA cm−2 for OER and HER, respectively. The overpotential for OER of this CoSe4-containing complex is one of the lowest that has been observed until now for molecular cobalt(II) systems, under the reported conditions. In addition, this cobalt–seleno-based complex exhibits a high mass activity (14.15 A g−1) and a much higher turn-over frequency (TOF) value (0.032 s−1) at an overpotential of 300 mV. These observations confirm analogous ones already reported in the literature pertaining to the potential of molecular cobalt–seleno systems as efficient OER electrocatalysts. |
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| Keywords: | cobalt complex electrocatalysis water splitting hydrogen evolution oxygen evolution |
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