Selective electrochemical reduction of CO₂ to CO with a cobalt chlorin complex adsorbed on multi-walled carbon nanotubes in water

Abstract

Electrocatalytic reduction of CO2 occurred efficiently using a glassy carbon electrode modified with a cobalt(II) chlorin complex adsorbed on multi-walled carbon nanotubes at an applied potential of -1.1 V vs. NHE to yield CO with a Faradaic efficiency of 89% with hydrogen production accounting for the remaining 11% at pH 4.6.

Carbon Solving Carbon's Problems: Recent Progress of Nanostructured Carbon‐Based Catalysts for the Electrochemical Reduction of CO2

“…[79][80][81]87,88] The preparation of these porphyrin-based materials is generally through solvothermal or hydrothermal approaches, with the resultant materials deposited on conductive substrates to form the CO 2 RR electrodes. Constructing the electrocatalysts in this way requires no high temperature steps which preserves the structure of the prophyrins and their well-defined active metal centres.…”

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

“…[21][22][23][24] Although homogeneous catalysts are popular for CO 2 RR application, applying heterogeneous catalysts is essential for emerging of CO 2 to CO conversion in large scale. [19,31,[39][40][41][42] Among transition metal complexes, iron, [24,25,[43][44][45] cobalt [46][47][48] and nickel, [49][50][51] are prevailing and more environmentally friendly than other metals used for CO 2 RR application. [25][26][27] Immobilization of molecular catalysts onto electrode surfaces can occur via several methods which include covalent bonding, [28,29] non-covalent attachment, [30,31] and surface polymerization.…”

“…[25][26][27] Immobilization of molecular catalysts onto electrode surfaces can occur via several methods which include covalent bonding, [28,29] non-covalent attachment, [30,31] and surface polymerization. [19,31,[39][40][41][42] Among transition metal complexes, iron, [24,25,[43][44][45] cobalt [46][47][48] and nickel, [49][50][51] are prevailing and more environmentally friendly than other metals used for CO 2 RR application. [30,[35][36][37][38] Carbon nanotubes (CNTs) are of particular interest for CO 2 electroreduction owing to their high stability, conductivity and large surface area.…”

A Hybrid Co Quaterpyridine Complex/Carbon Nanotube Catalytic Material for CO2 Reduction in Water

“…[8] Another recent example is given by atetraphenyl Fe porphyrin with trimethyl ammonio groups appended at the para position of the four phenyl groups. Among several examples,F e [12] and Co [13][14][15] porphyrins as well as Co phthalocyanines [16,17] have been investigated. Formate production has been even more rare,w ith as example small iron clusters,s uch as [Fe 4 N(CO) 12 ] À reaching selectivity and Faradaic efficiency (FE) above 95 %, while the applied overpotential for the reaction is only 230-440 mV (pH 7-13).…”