Three-dimensional porous hollow fibre copper electrodes for efficient and high-rate electrochemical carbon dioxide reduction

Abstract

Aqueous-phase electrochemical reduction of carbon dioxide requires an active, earth-abundant electrocatalyst, as well as highly efficient mass transport. Here we report the design of a porous hollow fibre copper electrode with a compact three-dimensional geometry, which provides a large area, three-phase boundary for gas–liquid reactions. The performance of the copper electrode is significantly enhanced; at overpotentials between 200 and 400 mV, faradaic efficiencies for carbon dioxide reduction up to 85% are obtained. Moreover, the carbon monoxide formation rate is at least one order of magnitude larger when compared with state-of-the-art nanocrystalline copper electrodes. Copper hollow fibre electrodes can be prepared via a facile method that is compatible with existing large-scale production processes. The results of this study may inspire the development of new types of microtubular electrodes for electrochemical processes in which at least one gas-phase reactant is involved, such as in fuel cell technology.

Water Splitting–Biosynthetic Hybrid System for CO2 Conversion using Nickel Nanoparticles Embedded in N‐Doped Carbon Nanotubes

“…[1][2][3] Carbon capture and utilization are major challenges for building as ustainable society. [1][2][3] Carbon capture and utilization are major challenges for building as ustainable society.…”

Tuning of Silver Catalyst Mesostructure Promotes Selective Carbon Dioxide Conversion into Fuels

“…[11] As aresult, the local pH environment at the electrode surface is expected to be significantly more alkaline than the bulk environment. Indeed, recent reports of highly efficient, selective CO-evolving catalysts feature high surface area metal films prepared by methods such as nanoparticle deposition, [12,13] de-alloying, [14] or reduction of an oxide [6,[15][16][17][18] or chloride precursor phase. Indeed, recent reports of highly efficient, selective CO-evolving catalysts feature high surface area metal films prepared by methods such as nanoparticle deposition, [12,13] de-alloying, [14] or reduction of an oxide [6,[15][16][17][18] or chloride precursor phase.…”

Enhanced Electrochemical Reduction of CO2 to CO upon Immobilization onto Carbon Nanotubes Using an Iron‐Porphyrin Dimer

“…In this project, a new urea iron-tetraphenylporphyrin-dimer (Fe-TPP-Dimer) was synthesized and applied for electrocatalytic CO 2 reduction under both homogeneous and heterogeneous conditions to selectively reduce CO 2 to CO. Immobilization of the catalyst onto carbon nanotubes (CNTs) in aqueous solution resulted in remarkable enhancement of its electrocatalytic abilities, with exceptional turnover frequencies (10 s À 1 ), high faradic efficiency (FE) of ∼ 90%, and a current density of 16 mA/cm 2 at À 0.88 V vs. RHE. [12][13][14][15][16][17][18][19][20] Extensive research has been conducted on both homogeneous and heterogeneous molecular catalysts for CO 2 RR. [1][2][3][4][5] Although the capture and conversion of CO 2 to value-added synthons has become a desirable solution to this problem, challenges in regard to the species' general lack of reactivity and the costs associated with deployment and stability of such strategies remain prevalent.…”

“…[1][2][3][4][5] Although the capture and conversion of CO 2 to value-added synthons has become a desirable solution to this problem, challenges in regard to the species' general lack of reactivity and the costs associated with deployment and stability of such strategies remain prevalent. [12][13][14][15][16][17][18][19][20] Extensive research has been conducted on both homogeneous and heterogeneous molecular catalysts for CO 2 RR. [12][13][14][15][16][17][18][19][20] Extensive research has been conducted on both homogeneous and heterogeneous molecular catalysts for CO 2 RR.…”