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Finding the true catalyst for water oxidation at low overpotential in the presence of a metal complexSaleh Ali Akbari, Mohammad ...The design of molecular-based catalysts for oxygen-evolution reaction (OER) requires more investigations for the true catalyst to be found. First-row transition metal complexes are extensively ... investigated for OER, but the role of these metal complexes as a true catalyst is doubtful. Some doubts have been expressed about the role of first-row transition metal complexes for OER at high overpotentials ▫$(\eta > 450)$▫. Generally, the detection of the true catalyst has so far been focused on high overpotentials ▫$(\eta > 450)$▫ because at low overpotentials ▫$(\eta < 450)$▫, many methods are not sensitive enough to detect small amounts of heterogeneous catalysts on the electrode surface during the first seconds of the reaction. Ni(II) phthalocyanine-tetra sulfonate tetrasodium (1) is in moderate conditions (at 20-50 °C and pH 5-13) in the absence of electrochemical driving forces, which could make it noteworthy for OER. Herein, the results of OER in the presence of 1 at low overpotentials under alkaline conditions are presented. In addition, in the presence of Ni complexes, using an Fe ion is introduced as a new method for detecting Ni (hydr)oxide under OER. Our experiments indicate that in the presence of a homogeneous OER (pre)catalyst, a deep investigation is necessary to rule out the heterogeneous catalysts formed. Our approach is a roadmap in the field of catalysis to understand the OER mechanism in the presence of a molecular Ni-based catalyst design. Our results shown in this study are likely to open up new perspectives and discussion on many molecular catalysts in a considerable part of the chemistry community.Source: Inorganic chemistry. - ISSN 0020-1669 (Vol. 61, iss. 8, Feb. 2022, str. 3801-3810)Type of material - article, component part ; adult, seriousPublish date - 2022Language - englishCOBISS.SI-ID - 106080003
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Saleh Ali Akbari, Mohammad | |
Zand, Zahra | |
Aleshkevych, Pavlo | |
Jagličić, Zvonko | 11892 |
Najafpour, Mohammad Mahdi |
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