scholarly journals A local proton source in a [Mn(bpy-R)(CO)3Br]-type redox catalyst enables CO2 reduction even in the absence of Brønsted acids

2014 ◽  
Vol 50 (93) ◽  
pp. 14670-14673 ◽  
Author(s):  
Federico Franco ◽  
Claudio Cometto ◽  
Federico Ferrero Vallana ◽  
Fabrizio Sordello ◽  
Emanuele Priola ◽  
...  
Keyword(s):  
Catalytic Properties ◽  
Co2 Reduction ◽  
Homogeneous Solution ◽  
Bronsted Acids ◽  
Redox Catalyst ◽  
Proton Source

A novel bromotricarbonyl Mn(i) complex with a local proton source shows strong redox catalytic properties in acetonitrile homogeneous solution even in the absence of Brønsted acids.

scholarly journals Effect of linker functionalisation on the catalytic properties of Cu nanoclusters embedded in MOFs in direct CO and CO2 reduction by H2

2021 ◽  
Author(s):  
Cornelia Elizabeth Pompe ◽  
Petra Agota Szilagyi
Keyword(s):  
Catalytic Properties ◽  
Metal Organic Frameworks ◽  
Co2 Reduction ◽  
Catalytically Active ◽  
Metal Organic ◽  
Cu Nanoclusters

Metal-organic frameworks are promising host supporting matrices for catalytically active guest. In particular, their crystallinity renders them desirable as their pores may act as atom-precise templates for the growth of...

A local proton source from carboxylic acid functionalized metal porphyrins for enhanced electrocatalytic CO2 reduction

2020 ◽  
Vol 44 (37) ◽  
pp. 16062-16068
Author(s):  
Yiwei Zhou ◽  
Yunheng Xiao ◽  
Jian Zhao
Keyword(s):  
Carboxylic Acid ◽  
Benzoic Acid ◽  
Co2 Reduction ◽  
Proton Donor ◽  
Propanoic Acid ◽  
Metal Porphyrins ◽  
Proton Source

Metal tetraphenylporphyrin modified through the introduction of propanoic acid into the phenyl groups as a local proton donor exhibits higher CO2 electrocatalytic conversion to CO than benzoic acid.

Photochemical Properties of Re(CO)3 Complexes with and without a Local Proton Source and Implications for CO2 Reduction Catalysis

2020 ◽  
Vol 39 (13) ◽  
pp. 2405-2414
Author(s):  
Lucas A. Paul ◽  
Nico C. Röttcher ◽  
Jennifer Zimara ◽  
Jan-Hendrik Borter ◽  
Jia-Pei Du ◽  
...  
Keyword(s):  
Co2 Reduction ◽  
Proton Source ◽  
Photochemical Properties

scholarly journals Ammonium as a Carbon-Free Electron and Proton Source in Microbial Electrosynthesis Processes

2020 ◽  
Vol 12 (8) ◽  
pp. 3081 ◽  
Author(s):  
Vasan Sivalingam ◽  
Carlos Dinamarca ◽  
Gamunu Samarakoon ◽  
Dietmar Winkler ◽  
Rune Bakke
Keyword(s):  
Co2 Reduction ◽  
Organic Substances ◽  
Energy Research ◽  
Biogas Upgrading ◽  
Microbial Electrosynthesis ◽  
Proton Source ◽  
Biomethane Production ◽  
Anodic Reactions ◽  
By Products ◽  
Opinion Article

Biogas upgrading to biomethane with microbial electrosynthesis (MES) is receiving much attention due to increasing biomethane demands and surplus renewable energy. Research has demonstrated the feasibility of MES to increase methane yield by reducing CO2 in anaerobic digestion (AD). Such CO2 reduction occurs at the cathode and requires the supply of both protons and electrons. The most studied sources of protons and electrons are oxidation of organic substances and water, generated at the anode. These anodic reactions, however, also imply the production of CO2 and O2, respectively, both with negative implications for the AD process. A source of protons and electrons without CO2 and O2 as by-products would be beneficial for MES-enhanced biomethane production. This opinion article discusses the possibility of ammonium to serve as a sustainable proton and electron source.

Electrochemical CO2 reduction with low overpotential by a poly(4-vinylpyridine) electrode for application to artificial photosynthesis

2017 ◽  
Vol 198 ◽  
pp. 409-418 ◽  
Author(s):  
Hohyun Jeong ◽  
Myung Jong Kang ◽  
Hyeyeong Jung ◽  
Young Soo Kang
Keyword(s):  
Charge Transfer ◽  
Current Density ◽  
Electrochemical Impedance ◽  
Catalytic Properties ◽  
Co2 Reduction ◽  
Surface Concentration ◽  
Reduction Reaction ◽  
Pt Electrodes ◽  
Electrochemical Co2 Reduction ◽  
Low Overpotential

Pyridine molecules have been used as a catalyst to reduce the activation energy of the CO2 reduction reaction. It has been reported that CO2 is reduced by pyridine catalysts at low overpotential around −0.58 V vs. SCE. Poly(4-vinylpyridine), which has pyridine functional groups shows similar catalytic properties to reduce CO2 at low overpotential like pyridinium catalysts. Different thickness of P(4-VP) coated Pt electrodes were analyzed to determine the catalytic properties for CO2 reduction. Cyclic voltammetry, chronoamperometry and electrochemical impedance spectroscopy methods showed the catalytic CO2 reduction properties of a P(4-VP)/Pt electrode. Thin P(4-VP)/Pt film showed a low current density of −0.16 mA cm−2 under CO2 atmosphere and the current density reached −0.45 mA cm−2 with increase of the P(4-VP) thickness. The increase of current density was explained by an increased surface concentration of adsorbed pyridinium groups of the thick P(4-VP) layer. Nyquist plots also showed decrease of impedance with increase of the P(4-VP) layer indicating fast charge transfer between Pt and the P(4-VP) layer due to the increase of hybrid ionic complex formation on the Pt surface. However, charge transfer is restricted when the P(4-VP) layer becomes more thick because of slowed protonation of pyridine groups adjacent to the Pt surface due to the suppressed permeability of electrolyte solution into the PVP membrane. This electrochemical observation provides a new aspect of P(4-VP) polymer for CO2 reduction.

scholarly journals AgPd nanoparticles for electrocatalytic CO2 reduction: bimetallic composition-dependent ligand and ensemble effects

Nanoscale ◽  
2020 ◽  
Vol 12 (26) ◽  
pp. 14068-14075 ◽  
Author(s):  
Meiyang Cui ◽  
Grayson Johnson ◽  
Zhiyong Zhang ◽  
Shuang Li ◽  
Sooyeon Hwang ◽  
...  
Keyword(s):  
Catalytic Properties ◽  
Co2 Reduction ◽  
Ensemble Effects

By balancing bimetallic composition-associated ligand and ensemble effects, Ag15Pd85 nanoparticles show enhanced catalytic properties for electrochemical CO2 reduction.

scholarly journals Dinuclear Rhenium Complex with a Proton Responsive Ligand as a Redox Catalyst for the Electrochemical CO2 Reduction

2017 ◽  
Vol 56 (7) ◽  
pp. 4176-4185 ◽  
Author(s):  
Alexander Wilting ◽  
Thorsten Stolper ◽  
Ricardo A. Mata ◽  
Inke Siewert
Keyword(s):  
Co2 Reduction ◽  
Rhenium Complex ◽  
Redox Catalyst ◽  
Electrochemical Co2 Reduction

Electrocatalytic CO2 reduction by a cobalt bis(pyridylmonoimine) complex: effect of acid concentration on catalyst activity and stability

2018 ◽  
Vol 54 (13) ◽  
pp. 1579-1582 ◽  
Author(s):  
Weixuan Nie ◽  
Charles C. L. McCrory
Keyword(s):  
Acid Concentration ◽  
Catalyst Activity ◽  
Co2 Reduction ◽  
Complex Effect ◽  
Proton Source

Adding a proton source accelerates the rate of CO2 reduction by a cobalt bis(pyridylmonoimine) complex and increases the catalyst's stability.

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