scholarly journals Supramolecular Tuning Enables Selective Oxygen Reduction Catalyzed by Cobalt Porphyrins for Direct Electrosynthesis of Hydrogen Peroxide

2020 ◽  
Vol 132 (12) ◽  
pp. 4932-4937
Author(s):  
Peter T. Smith ◽  
Younghoon Kim ◽  
Bahiru Punja Benke ◽  
Kimoon Kim ◽  
Christopher J. Chang
Keyword(s):  
Hydrogen Peroxide ◽  
Oxygen Reduction ◽  
Electrosynthesis Of Hydrogen Peroxide ◽  
Cobalt Porphyrins

scholarly journals Supramolecular Tuning Enables Selective Oxygen Reduction Catalyzed by Cobalt Porphyrins for Direct Electrosynthesis of Hydrogen Peroxide

2020 ◽  
Vol 59 (12) ◽  
pp. 4902-4907 ◽  
Author(s):  
Peter T. Smith ◽  
Younghoon Kim ◽  
Bahiru Punja Benke ◽  
Kimoon Kim ◽  
Christopher J. Chang
Keyword(s):  
Hydrogen Peroxide ◽  
Oxygen Reduction ◽  
Electrosynthesis Of Hydrogen Peroxide ◽  
Cobalt Porphyrins

scholarly journals Supramolecular Tuning Enables Selective Oxygen Reduction Catalyzed by Cobalt Porphyrins for Direct Electrosynthesis of Hydrogen Peroxide

2019 ◽  
Author(s):  
Peter T. Smith ◽  
Younghoon Kim ◽  
Bahiru Punja Benke ◽  
Kimoon Kim ◽  
Christopher Chang
Keyword(s):  
Oxygen Reduction ◽  
High Selectivity ◽  
Selective Reduction ◽  
Design Strategy ◽  
Reduction Reaction ◽  
Site Isolation ◽  
Control Reaction ◽  
Electrosynthesis Of Hydrogen Peroxide ◽  
Cobalt Porphyrins ◽  
Catalytic Applications

<div> <div> <div> <p>We report a supramolecular design strategy for promoting the selective reduction of O2 for direct electrosynthesis of H2O2. Specifically, we utilized cobalt tetraphenylporphyrin (Co-TPP), a non-selective oxygen reduction reaction (ORR) catalyst, as a building block to assemble the permanently porous supramolecular cage Co-PB-1(6) bearing six Co-TPP subunits connected through twenty-four imine bonds. Reduction of these imine linkers to amines yields the more flexible porous cage Co-rPB-1(6). Both Co-PB-1(6) and Co-rPB-1(6) cages produce 90-100% H2O2 from electrochemical ORR catalysis in neutral pH water, and we attribute this high selectivity to site isolation of the discrete molecular units, as the analogous Co-TPP monomer generates only a 50% mixture of H2O2 and H2O from electrochemical ORR under the same conditions. The ability to control reaction selectivity in supramolecular structures beyond traditional host-guest interactions offers new opportunities for designing such architectures for a broader range of catalytic applications. </p> </div> </div> </div>

scholarly journals Supramolecular Tuning Enables Selective Oxygen Reduction Catalyzed by Cobalt Porphyrins for Direct Electrosynthesis of Hydrogen Peroxide

2019 ◽  
Author(s):  
Peter T. Smith ◽  
Younghoon Kim ◽  
Bahiru Punja Benke ◽  
Kimoon Kim ◽  
Christopher Chang
Keyword(s):  
Oxygen Reduction ◽  
High Selectivity ◽  
Selective Reduction ◽  
Design Strategy ◽  
Reduction Reaction ◽  
Site Isolation ◽  
Control Reaction ◽  
Electrosynthesis Of Hydrogen Peroxide ◽  
Cobalt Porphyrins ◽  
Catalytic Applications

<div> <div> <div> <p>We report a supramolecular design strategy for promoting the selective reduction of O2 for direct electrosynthesis of H2O2. Specifically, we utilized cobalt tetraphenylporphyrin (Co-TPP), a non-selective oxygen reduction reaction (ORR) catalyst, as a building block to assemble the permanently porous supramolecular cage Co-PB-1(6) bearing six Co-TPP subunits connected through twenty-four imine bonds. Reduction of these imine linkers to amines yields the more flexible porous cage Co-rPB-1(6). Both Co-PB-1(6) and Co-rPB-1(6) cages produce 90-100% H2O2 from electrochemical ORR catalysis in neutral pH water, and we attribute this high selectivity to site isolation of the discrete molecular units, as the analogous Co-TPP monomer generates only a 50% mixture of H2O2 and H2O from electrochemical ORR under the same conditions. The ability to control reaction selectivity in supramolecular structures beyond traditional host-guest interactions offers new opportunities for designing such architectures for a broader range of catalytic applications. </p> </div> </div> </div>

High-Yield Electrosynthesis of Hydrogen Peroxide from Oxygen Reduction by Hierarchically Porous Carbon

2015 ◽  
Vol 127 (23) ◽  
pp. 6941-6945 ◽  
Author(s):  
Yanming Liu ◽  
Xie Quan ◽  
Xinfei Fan ◽  
Hua Wang ◽  
Shuo Chen
Keyword(s):  
Hydrogen Peroxide ◽  
Oxygen Reduction ◽  
Porous Carbon ◽  
High Yield ◽  
Hierarchically Porous ◽  
Electrosynthesis Of Hydrogen Peroxide

Highly effective electrosynthesis of hydrogen peroxide from oxygen on a redox-active cationic covalent triazine network

2018 ◽  
Vol 54 (35) ◽  
pp. 4433-4436 ◽  
Author(s):  
Lan-Zhen Peng ◽  
Pei Liu ◽  
Qing-Qing Cheng ◽  
Wen-Jing Hu ◽  
Yahu A. Liu ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Oxygen Reduction ◽  
Redox Process ◽  
Redox Active ◽  
Reversible Redox ◽  
Electrosynthesis Of Hydrogen Peroxide ◽  
Highly Effective

The 2e− reversible redox process of a cationic covalent triazine network mediates the selective oxygen reduction to produce H2O2.

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