Anion exchange-induced single-molecule dispersion of cobalt porphyrins in a cationic porous organic polymer for enhanced electrochemical CO2 reduction via secondary-coordination sphere interactions

2020 ◽  
Vol 8 (36) ◽  
pp. 18677-18686
Author(s):  
Jia-Kang Tang ◽  
Chen-Yuan Zhu ◽  
Tian-Wen Jiang ◽  
Lei Wei ◽  
Hui Wang ◽  
...  
Keyword(s):  
Anion Exchange ◽  
Coordination Sphere ◽  
Single Molecule ◽  
Co2 Reduction ◽  
Organic Polymer ◽  
Synergistic Catalysis ◽  
Promising Strategy ◽  
Electrochemical Co2 Reduction ◽  
Secondary Coordination Sphere ◽  
Cobalt Porphyrins

Anion exchange is a promising strategy to achieve synergistic catalysis via secondary coordination sphere interactions between the catalyst and the support.

scholarly journals Correction: Anion exchange-induced single-molecule dispersion of cobalt porphyrins in a cationic porous organic polymer for enhanced electrochemical CO2 reduction via secondary-coordination sphere interactions

2020 ◽  
Vol 8 (38) ◽  
pp. 20192-20193
Author(s):  
Jia-Kang Tang ◽  
Chen-Yuan Zhu ◽  
Tian-Wen Jiang ◽  
Lei Wei ◽  
Hui Wang ◽  
...  
Keyword(s):  
Anion Exchange ◽  
Coordination Sphere ◽  
Single Molecule ◽  
Co2 Reduction ◽  
Organic Polymer ◽  
Porous Organic Polymer ◽  
Electrochemical Co2 Reduction ◽  
Secondary Coordination Sphere ◽  
Cobalt Porphyrins

Correction for ‘Anion exchange-induced single-molecule dispersion of cobalt porphyrins in a cationic porous organic polymer for enhanced electrochemical CO2 reduction via secondary-coordination sphere interactions’ by Jia-Kang Tang et al., J. Mater. Chem. A, 2020, DOI: 10.1039/d0ta07068h.

Synergistic catalysis of CuO/In2O3 composites for highly selective electrochemical CO2 reduction to CO

2019 ◽  
Vol 55 (82) ◽  
pp. 12380-12383 ◽  
Author(s):  
Senlin Chu ◽  
Song Hong ◽  
Justus Masa ◽  
Xin Li ◽  
Zhenyu Sun
Keyword(s):  
Co2 Reduction ◽  
Synergistic Catalysis ◽  
Electrochemical Co2 Reduction

We demonstrate synergistic catalysis of CuO and In2O3 for efficient electrochemical CO2 reduction to CO.

Construction of secondary coordination sphere boosts electrochemical CO2 reduction of iron porphyrins

2020 ◽  
Vol 24 (01n03) ◽  
pp. 465-472 ◽  
Author(s):  
Guiyu Liu ◽  
Ying-Jie Fan ◽  
Jun-Long Zhang
Keyword(s):  
Phenyl Ring ◽  
Co2 Reduction ◽  
Ortho Position ◽  
Iron Porphyrins ◽  
Reduction Of Iron ◽  
Electrochemical Co2 Reduction ◽  
Secondary Coordination Sphere ◽  
Turn Over Frequency ◽  
Turn Over ◽  
Lower Overpotential

Iron porphyrins with simple aminophenyl substitution are synthesized and their electrochemical CO[Formula: see text] reduction properties are studied. Fe-1, bearing an amino group in the ortho position of the phenyl ring exhibits an improved catalytic turn over frequency (TOF), lower overpotential and higher selectivity, compared with para-amino-substituted iron porphyrin (Fe-2) and the control iron tetraphenylporphyrin (Fe-3). DFT calculations also support the importance of hydrogen bonds on the reactivity of Fe-1, which facilitates the formation [Fe–CO[Formula: see text]][Formula: see text] adduct by lowering 1.45 kcal mol[Formula: see text].

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.

Coordination state of cobalt(II) ions in solution and on a sulphonated organic polymer

1979 ◽  
Vol 44 (8) ◽  
pp. 2330-2337 ◽  
Author(s):  
Jindřiška Maternová ◽  
Anastas A. Andreev ◽  
Dimitrii M. Shopov ◽  
Karel Setínek
Keyword(s):  
Acetic Acid ◽  
Coordination Sphere ◽  
Glacial Acetic Acid ◽  
Organic Polymer ◽  
Octahedral Complex ◽  
Coordination State ◽  
Tetrahedral Symmetry ◽  
Liquid Acid ◽  
Homogeneous Phase ◽  
Bromide Ion

It was found spectroscopically that cobalt(II) acetate dissolved in glacial acetic acid forms the octahedral complex [Co(OAc)2(HOAc)4] which in the presence of bromide ions gives the octahedral [Co(OAc)Br(HOAc)4] and tetrahedral bromo(acetate)cobalt(II) complexes with the higher number of Br- ions. When attached to an organic polymer cobalt(II) ions are bonded in the form of octahedral [Co(H2O)6]2+ cations which form with acetic acid similar complexes as in homogeneous phase and are able to coordinate one bromide ion. Drying the copolymer possessing octahedral hexaaquocobalt(II) cations leads to tetrahedral aquocomplexes which are solvated by gaseous acetic acid and converted into the acetate complexes with the liquid acid. The latter contain the acid in the inner coordination sphere and have tetrahedral symmetry.

Nanoporous Au-Sn with solute strain for simultaneously enhanced selectivity and durability during electrochemical CO2 reduction

2020 ◽  
Vol 43 ◽  
pp. 154-160 ◽  
Author(s):  
Xianglong Lu ◽  
Tianshui Yu ◽  
Hailing Wang ◽  
Lihua Qian ◽  
Ruichun Luo ◽  
...  
Keyword(s):  
Co2 Reduction ◽  
Electrochemical Co2 Reduction ◽  
Enhanced Selectivity
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