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- W4380303145 abstract "Electrocatalytic CO2 reduction reaction (CO2RR) based on molecular catalysts, e.g., cobalt porphyrin, is a promising approach to enhance carbon cycle and mitigate climate crisis. However, the electrocatalytic performance and accurate evaluations remains problems because of either the low loading amount or the low utilization rate of the electroactive CoN4 sites. W e herein synthesized a monomer, cobalt(II)-5,10,15,20-tetrakis(3,5-di(thiophen-2-yl)phenyl)porphyrin (CoP), electropolymerized it onto the crosslinked carbon nanotubes (CNTs) networks, affording a molecular electrocatalyst of three-dimensional (3D) microporous nanofilm (EP-CoP, 2∼3 nm thickness) with highly dispersed CoN4 sites. The new electrocatalyst shortens the electron transfer pathway, accelerates the redox kinetics of CoN4 sites and improves the durability in the electrocatalytic CO2RR. From the intrinsic redox behavior of CoN4 sites, the effective utilization rate is obtained as 13.1%, much higher than that of the monomer assembled electrode (5.8%), and the durability is also promoted dramatically (> 40 h) in a H-type cell. In a commercial flow cell, EP-CoP can achieve a faradic efficiency for CO (FECO) over 92% at an overpotential of 160 mV. At a higher overpotential of 620 mV, the working current density can reach 310 mA cm−2 with a high FECO of 98.6%, representing the best performance for electrodeposited molecular porphyrin electrocatalysts. This article is protected by copyright. All rights reserved" @default.
- W4380303145 created "2023-06-13" @default.
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- W4380303145 date "2023-06-12" @default.
- W4380303145 modified "2023-10-18" @default.
- W4380303145 title "In‐situ Electropolymerized Three‐Dimensional Microporous Cobalt‐Porphyrin Nanofilm for Highly Effective Molecular Electrocatalytic Reduction of Carbon Dioxide" @default.
- W4380303145 doi "https://doi.org/10.1002/adma.202303179" @default.
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