Electroreduction of CO2 catalyzed by Ni (II) tetraazamacrocyclic complexes—reasons of poisoning of the catalytic surfaces

Bujno, Krzysztof; Bilewicz, Renata; Siegfried, Liselotte; Kaden, Thomas A.

doi:10.1016/s0013-4686(96)00286-1

Cited by 19 publications

(12 citation statements)

References 15 publications

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“…They found an insoluble species precipitating on the mercury electrode that significantly inhibited further CO 2 reduction. Following their previous results and in accordance with the findings of Bujno et al., [290] they assigned the precipitate to the neutral one‐electron‐reduction product [Ni(cyclam)CO] 0 . This further supported their mechanistic suggestions and attributed CO 2 reduction to CO via the ET M route.…”

Section: Transition Metal Complexes As Catalysts In Electrochemical Co2 Reductionsupporting

confidence: 85%

Transition Metal Complexes as Catalysts for the Electroconversion of CO₂: An Organometallic Perspective

2021

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The electrocatalytic transformation of carbon dioxide has been a topic of interest in the field of CO2 utilization for a long time. Recently, the area has seen increasing dynamics as an alternative strategy to catalytic hydrogenation for CO2 reduction. While many studies focus on the direct electron transfer to the CO2 molecule at the electrode material, molecular transition metal complexes in solution offer the possibility to act as catalysts for the electron transfer. C1 compounds such as carbon monoxide, formate, and methanol are often targeted as the main products, but more elaborate transformations are also possible within the coordination sphere of the metal center. This perspective article will cover selected examples to illustrate and categorize the currently favored mechanisms for the electrochemically induced transformation of CO2 promoted by homogeneous transition metal complexes. The insights will be corroborated with the concepts and elementary steps of organometallic catalysis to derive potential strategies to broaden the molecular diversity of possible products.

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Section: Transition Metal Complexes As Catalysts In Electrochemical Co2 Reductionsupporting

confidence: 85%

Transition Metal Complexes as Catalysts for the Electroconversion of CO₂: An Organometallic Perspective

2021

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“…For a pure Sn electrocatalyst, a decrease in performance could be caused by several factors: 388 (1) cathodic degradation of the catalyst surface, (2) deposition of non-catalytic species from reaction intermediates in the reduction of the pollutant species, (3) deposition of non-catalytic metallic species from contaminants in the electrolyte, 335 and (4) anodic degradation of the catalyst at sites where gas bubbles formed, preventing the cathodic polarization of the catalyst. Bujno et al 389 conducted experiments in diluted solutions and confirmed that the Ni(I) complex catalysts present at the electrode surface were transformed into a catalytically inactive Ni(0) carbonyl deposit, blocking the electrode surface against further catalysis. Benson and Kubiak 390 investigated the deactivation pathway of the Lehn catalyst.…”

Section: Catalyst Stability Activity Degradation and Mitigationmentioning

confidence: 97%

A review of catalysts for the electroreduction of carbon dioxide to produce low-carbon fuels

et al. 2014

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This paper reviews recent progress made in identifying electrocatalysts for carbon dioxide (CO2) reduction to produce low-carbon fuels, including CO, HCOOH/HCOO(-), CH2O, CH4, H2C2O4/HC2O4(-), C2H4, CH3OH, CH3CH2OH and others. The electrocatalysts are classified into several categories, including metals, metal alloys, metal oxides, metal complexes, polymers/clusters, enzymes and organic molecules. The catalyts' activity, product selectivity, Faradaic efficiency, catalytic stability and reduction mechanisms during CO2 electroreduction have received detailed treatment. In particular, we review the effects of electrode potential, solution-electrolyte type and composition, temperature, pressure, and other conditions on these catalyst properties. The challenges in achieving highly active and stable CO2 reduction electrocatalysts are analyzed, and several research directions for practical applications are proposed, with the aim of mitigating performance degradation, overcoming additional challenges, and facilitating research and development in this area.

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“…Sie fanden eine unlösliche Spezies, die sich auf der Quecksilberelektrode niederschlug und die weitere CO 2 ‐Reduktion signifikant hemmte. In Anlehnung an ihre früheren Ergebnisse und in Übereinstimmung mit den Erkenntnissen von Bujno et al [290] . ordneten sie den Niederschlag dem neutralen Ein‐Elektronen‐Reduktionsprodukt [Ni(cyclam)CO] 0 zu.…”

Section: üBergangsmetallkomplexe Als Katalysatoren In Der Elektrochemischen Co2‐reduktionunclassified

“…In einer Folgestudie untersuchten Balazs et al den Einfluss von CO auf das katalytische Verhalten von [Ni(cyclam)] 2+ . [289] Sie fanden eine unlçsliche Spezies,d ie sich auf der Quecksilberelektrodeniederschlug und die weitere CO 2 -Reduktion signifikant hemmte.I nA nlehnung an ihre früheren Ergebnisse und in Übereinstimmung mit den Erkenntnissen von Bujno et al [290] ordneten sie den Niederschlag dem neutralen Ein-Elektronen-Reduktionsprodukt [Ni(cyclam)CO] 0 zu. Dies stützte ihre mechanistischen Vorschläge weiter und schrieb die CO 2 -Reduktion zu CO der ET M -Route zu.…”

Section: Angewandte Chemieunclassified

Übergangsmetallkomplexe als Katalysatoren für die elektrische Umwandlung von CO₂ – eine metallorganische Perspektive

2021

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Die elektrokatalytische Umwandlung von Kohlendioxid ist in der CO2‐Nutzung seit langem von Interesse. Während sich viele Studien auf den direkten Elektronentransfer vom Elektrodenmaterial auf das CO2‐Molekül konzentrieren, bieten molekulare Übergangsmetallkomplexe in Lösung die Möglichkeit, als Katalysatoren für den Elektronentransfer zu wirken. C1‐Verbindungen wie Kohlenmonoxid, Formiat oder Methanol werden oft als Hauptprodukte angestrebt, aber auch kompliziertere Umwandlungen sind innerhalb der Koordinationssphäre des Metallzentrums möglich. Dieser Perspektivartikel behandelt ausgewählte Beispiele, um die gegenwärtig favorisierten Mechanismen für die elektrochemisch induzierten und durch homogene Übergangsmetallkomplexe geförderten Umwandlungspfade von CO2 zu illustrieren und zu kategorisieren. Diese Erkenntnisse werden mit den Konzepten und Elementarschritten der metallorganischen Katalyse untermauert, um mögliche Strategien zur Erweiterung der molekularen Produktvielfalt als Zukunftsperspektive abzuleiten.

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Electroreduction of CO2 catalyzed by Ni (II) tetraazamacrocyclic complexes—reasons of poisoning of the catalytic surfaces

Cited by 19 publications

References 15 publications

Transition Metal Complexes as Catalysts for the Electroconversion of CO₂: An Organometallic Perspective

Transition Metal Complexes as Catalysts for the Electroconversion of CO₂: An Organometallic Perspective

A review of catalysts for the electroreduction of carbon dioxide to produce low-carbon fuels

Übergangsmetallkomplexe als Katalysatoren für die elektrische Umwandlung von CO₂ – eine metallorganische Perspektive

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Electroreduction of CO2 catalyzed by Ni (II) tetraazamacrocyclic complexes—reasons of poisoning of the catalytic surfaces

Cited by 19 publications

References 15 publications

Transition Metal Complexes as Catalysts for the Electroconversion of CO2: An Organometallic Perspective

Transition Metal Complexes as Catalysts for the Electroconversion of CO2: An Organometallic Perspective

A review of catalysts for the electroreduction of carbon dioxide to produce low-carbon fuels

Übergangsmetallkomplexe als Katalysatoren für die elektrische Umwandlung von CO2 – eine metallorganische Perspektive

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Transition Metal Complexes as Catalysts for the Electroconversion of CO₂: An Organometallic Perspective

Transition Metal Complexes as Catalysts for the Electroconversion of CO₂: An Organometallic Perspective

Übergangsmetallkomplexe als Katalysatoren für die elektrische Umwandlung von CO₂ – eine metallorganische Perspektive