scholarly journals Electrocatalytic CO2 reduction at low overpotentials using iron(III) tetra(meso-thienyl)porphyrins

2019 ◽  
Author(s):  
Josh D. B. Koenig ◽  
Janina Willkomm ◽  
Roland Roesler ◽  
Warren Piers ◽  
Gregory C. Welch
Keyword(s):  
Electrochemical Properties ◽  
Co2 Reduction

<p>The optical and electrochemical properties, as well as the CO<sub>2</sub> reduction capability of two different iron(III) thienyl-porphyrins, iron(III) tetra(<i>meso</i>-thien-2-yl)porphyrin (<b>FeTThP</b>) and iron(III) tetra(<i>meso</i>-5-methylthien-2-yl)porphyrin (<b>FeTThMeP</b>), are directly compared to those of iron(III) tetra(<i>meso</i>-phenyl)porphyrin (<b>FeTPP</b>). Through exploitation of mesomeric stabilization effects, <b>FeTThP</b> and <b>FeTThMeP</b> both reduced CO<sub>2</sub> to CO with comparable faradaic efficiencies and TON<sub>CO</sub> <sub> </sub>relative to <b>FeTPP</b>, with an overpotential 150 mV lower than the benchmark catalyst. </p>

Electrochemical Properties and CO2-Reduction Ability of m-Terphenyl Isocyanide Supported Manganese Tricarbonyl Complexes

2016 ◽  
Vol 55 (23) ◽  
pp. 12400-12408 ◽  
Author(s):  
Douglas W. Agnew ◽  
Matthew D. Sampson ◽  
Curtis E. Moore ◽  
Arnold L. Rheingold ◽  
Clifford P. Kubiak ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
Co2 Reduction ◽  
Manganese Tricarbonyl

Ambiguous electrocatalytic CO2 reduction behaviour of a nickel bis(aldimino)pyridine pincer complex

2016 ◽  
Vol 45 (39) ◽  
pp. 15285-15289 ◽  
Author(s):  
Remya Narayanan ◽  
Meaghan McKinnon ◽  
Blake R. Reed ◽  
Ken T. Ngo ◽  
Stanislav Groysman ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
Co2 Reduction ◽  
Pincer Complexes ◽  
Pincer Complex ◽  
Reduction Behaviour

The electrochemical properties of two Ni(NNN)X2 pincer complexes are reported where X = Cl or Br and NNN is N,N′-(2,6-diisopropylphenyl)bis-aldiminopyridine.

Elucidating the electronic structures of β-Ag2MoO4 and Ag2O nanocrystals via theoretical and experimental approaches towards electrochemical water splitting and CO2 reduction

2021 ◽  
Vol 23 (15) ◽  
pp. 9539-9552
Author(s):  
Afsaneh Zareie-Darmian ◽  
Hossein Farsi ◽  
Alireza Farrokhi ◽  
Reza Sarhaddi ◽  
Zhihai Li
Keyword(s):  
Experimental Study ◽  
Electronic Structure ◽  
Electrochemical Properties ◽  
Water Splitting ◽  
Electronic Structures ◽  
Co2 Reduction ◽  
Experimental Approaches ◽  
Electrochemical Water Splitting

In this paper, we demonstrate a combined theoretical and experimental study on the electronic structure, and the optical and electrochemical properties of β-Ag2MoO4 and Ag2O as significant Ag-containing compounds.

Electrocatalytic CO2 reduction at low overpotentials using iron(III) tetra(meso-thienyl)porphyrins

2019 ◽  
Author(s):  
Josh D. B. Koenig ◽  
Janina Willkomm ◽  
Roland Roesler ◽  
Warren Piers ◽  
Gregory C. Welch
Keyword(s):  
Electrochemical Properties ◽  
Co2 Reduction

<p>The optical and electrochemical properties, as well as the CO<sub>2</sub> reduction capability of two different iron(III) thienyl-porphyrins, iron(III) tetra(<i>meso</i>-thien-2-yl)porphyrin (<b>FeTThP</b>) and iron(III) tetra(<i>meso</i>-5-methylthien-2-yl)porphyrin (<b>FeTThMeP</b>), are directly compared to those of iron(III) tetra(<i>meso</i>-phenyl)porphyrin (<b>FeTPP</b>). Through exploitation of mesomeric stabilization effects, <b>FeTThP</b> and <b>FeTThMeP</b> both reduced CO<sub>2</sub> to CO with comparable faradaic efficiencies and TON<sub>CO</sub> <sub> </sub>relative to <b>FeTPP</b>, with an overpotential 150 mV lower than the benchmark catalyst. </p>

scholarly journals Enhanced Electrocatalytic CO2 Reduction at Lower Overpotentials Using Iron (III) Tetra(thienyl)porphyrin

2019 ◽  
Author(s):  
Josh D. B. Koenig ◽  
Janina Willkomm ◽  
Roland Roesler ◽  
Warren Piers ◽  
Gregory C. Welch
Keyword(s):  
Electrochemical Properties ◽  
Co2 Reduction ◽  
Faradaic Efficiency ◽  
Lower Overpotential

Iron(III) tetra(5,10,15,20-thienyl)porphyrin chloride (FeTThP) is introduced as a new CO<sub>2</sub> reduction catalyst. The optical and electrochemical properties, as well as the CO<sub>2</sub> reduction capabilities of FeTThP are directly compared to those of iron(III) tetra(5,10,15,20-phenyl)porphyrin chloride (FeTPP). Relative to FeTPP, the newly developed FeTThP achieves a higher TON<sub>CO</sub>, with comparable faradaic efficiency, using a much lower overpotential.

The Plains CO2 Reduction (PCOR) Partnership: CO2 Sequestration Demonstration Projects Adding Value to the Oil and Gas Industry

2013 ◽  
Author(s):  
Charles D. Gorecki ◽  
Edward N. Steadman ◽  
John A. Harju ◽  
James A. Sorensen ◽  
John A. Hamling ◽  
...  
Keyword(s):  
Co2 Sequestration ◽  
Oil And Gas ◽  
Co2 Reduction ◽  
Oil And Gas Industry ◽  
Gas Industry

An NADH-Inspired Redox Mediator Strategy to Promote Second-Sphere Electron and Proton Transfer for Cooperative Electrochemical CO2 Reduction Catalyzed by Iron Porphyrin

2020 ◽  
Author(s):  
Peter T. Smith ◽  
Sophia Weng ◽  
Christopher Chang
Keyword(s):  
Proton Transfer ◽  
Co2 Reduction ◽  
Iron Porphyrin ◽  
Redox Mediators ◽  
Reservoir Properties ◽  
Proton Reduction ◽  
Electrochemical Co2 Reduction ◽  
Starting Point ◽  
Rate Improvement ◽  
Molecular Catalysts

We present a bioinspired strategy for enhancing electrochemical carbon dioxide reduction catalysis by cooperative use of base-metal molecular catalysts with intermolecular second-sphere redox mediators that facilitate both electron and proton transfer. Functional synthetic mimics of the biological redox cofactor NADH, which are electrochemically stable and are capable of mediating both electron and proton transfer, can enhance the activity of an iron porphyrin catalyst for electrochemical reduction of CO<sub>2</sub> to CO, achieving a 13-fold rate improvement without altering the intrinsic high selectivity of this catalyst platform for CO<sub>2</sub> versus proton reduction. Evaluation of a systematic series of NADH analogs and redox-inactive control additives with varying proton and electron reservoir properties reveals that both electron and proton transfer contribute to the observed catalytic enhancements. This work establishes that second-sphere dual control of electron and proton inventories is a viable design strategy for developing more effective electrocatalysts for CO<sub>2</sub> reduction, providing a starting point for broader applications of this approach to other multi-electron, multi-proton transformations.

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