TY - JOUR
T1 - A tetranuclear nickel(II) complex for water oxidation
T2 - Meeting new challenges
AU - Azadi, Gouhar
AU - Zand, Zahra
AU - Mousazade, Younes
AU - Bagheri, Robabeh
AU - Cui, Junfeng
AU - Song, Zhenlun
AU - Bikas, Rahman
AU - Wozniak, Krzysztof
AU - Allakhverdiev, Suleyman I.
AU - Najafpour, Mohammad Mahdi
N1 - Funding Information:
The authors are grateful to the grant from Iran National Science Foundation (INSF: 95007330 ), the Institute for Advanced Studies in Basic Sciences , Imam Khomeini International University , and the University of Warsaw for financial support . SIA was supported by the grant from the Russian Science Foundation (No: 19-14-00118 ).
Publisher Copyright:
© 2018 Hydrogen Energy Publications LLC
PY - 2019/1/28
Y1 - 2019/1/28
N2 - Ni complexes are promising catalysts for water splitting. Herein, a tetranuclear nickel(II) complex with bis-[(E)-N′-(1-(pyridin-2-yl)ethylidene)]carbohydrazide (HL), was synthesized and characterized by spectroscopic methods and single crystal X-ray analysis. The complex is a tetranuclear complex and the ligands are coordinated to the metal ions in the mono-negative form, (L)- to form a tetranuclear [NiL]4 4+ unit. Each Ni(II) ion is six-coordinated by pyridine nitrogen, azomethine nitrogen and oxygen atoms of two perpendicular carbohydrazone ligands in the mer configuration. The complex was studied as a water-oxidizing catalyst. In the next step, the role of the Ni-based compound for water oxidation on the surface of fluorine doped tin oxide as one of the true catalysts was investigated by scanning transmission electron microscopy, scanning transmission electron microscopy, spectroelectrochemistry, and electrochemistry. The electrode after water oxidation by the complex was studied and a relation between the decomposition of the Ni complex and water-oxidation reaction was proposed. The experiments show that under water-oxidation condition in the presence of the complex, a Ni-based compound on the electrode is a candidate as a contributor to the observed catalysis.
AB - Ni complexes are promising catalysts for water splitting. Herein, a tetranuclear nickel(II) complex with bis-[(E)-N′-(1-(pyridin-2-yl)ethylidene)]carbohydrazide (HL), was synthesized and characterized by spectroscopic methods and single crystal X-ray analysis. The complex is a tetranuclear complex and the ligands are coordinated to the metal ions in the mono-negative form, (L)- to form a tetranuclear [NiL]4 4+ unit. Each Ni(II) ion is six-coordinated by pyridine nitrogen, azomethine nitrogen and oxygen atoms of two perpendicular carbohydrazone ligands in the mer configuration. The complex was studied as a water-oxidizing catalyst. In the next step, the role of the Ni-based compound for water oxidation on the surface of fluorine doped tin oxide as one of the true catalysts was investigated by scanning transmission electron microscopy, scanning transmission electron microscopy, spectroelectrochemistry, and electrochemistry. The electrode after water oxidation by the complex was studied and a relation between the decomposition of the Ni complex and water-oxidation reaction was proposed. The experiments show that under water-oxidation condition in the presence of the complex, a Ni-based compound on the electrode is a candidate as a contributor to the observed catalysis.
KW - Electrocatalysis
KW - Nickel(II) complex
KW - True catalyst
KW - Water oxidation
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U2 - 10.1016/j.ijhydene.2018.12.059
DO - 10.1016/j.ijhydene.2018.12.059
M3 - Article
AN - SCOPUS:85059408926
SN - 0360-3199
VL - 44
SP - 2857
EP - 2867
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 5
ER -
