Advances in Metal Phthalocyanine based Carbon Composites for Electrocatalytic CO₂ Reduction

Abstract

Fossil energy can bring great convenience to human beings, but the carbon dioxide released at the same time can produce Greenhouse Effect, resulting in the rise of Earth's temperature, which has a great impact on the environment. Therefore, how to efficiently catalyze the reduction of carbon dioxide is a hot issue to be solved. Metal phthalocyanines exhibit superior electrochemical catalytic performance due to their large conjugated structure, while carbon nanotubes and graphene, as nanoscale materials, have extremely large surface area and excellent electrochemical performance. The combination of carbon nanotubes and graphene with metal phthalocyanine can greatly improve the electrocatalytic performance of the composites. Herein, in this review, the mechanism of catalytic reduction of carbon dioxide (CO2) by metal phthalocyanine based composites and its research progress are reviewed, the current problems in the field of electrocatalysis of phthalocyanine based composites with the future prospects are presented. We hope this review will help to stimulate further development of phthalocyanine based composites with high performance CO2 catalytic reduction.

Insight on Performance Degradation of Phthalocyanine Cobalt-Based Gas Diffusion Cathode for Carbon Dioxide Electrochemical Reduction

“…The peak value agrees with the literature . The peak area of Co II /Co I oxidation observed in the cyclic voltammogram (CV, Figure e) can be integrated to estimate the concentration of reducible Co sites accessible to the electron. − The concentration was found to be 2.17 × 10 –8 mol cm –2 , falling within the general concentration range for Co-active catalytic sites. , However, after electrolysis for a period of time, the oxidation peak from Co II to Co I (Figure f) became extremely weak and almost vanished. From the result, most of the reducible Co sites on the GDE have disappeared.…”

“…36−38 The concentration was found to be 2.17 × 10 −8 mol cm −2 , falling within the general concentration range for Co-active catalytic sites. 28,39 However, after electrolysis for a period of time, the oxidation peak from Co II to Co I (Figure 3f) became extremely weak and almost vanished. From the result, most of the reducible Co sites on the GDE have disappeared.…”

Bioinspired Self‐Supporting Phthalocyanine@ZnIn2S4 Foam for Photocatalytic CO2 Reduction Under Visible Light Irradiation

“…Metal phthalocyanine is a well‐known efficient electrocatalyst for CO 2 reduction but has rarely been explored in photocatalysis. [ 4 ] Neta and co‐workers first reported that both cobalt and iron phthalocyanine could exhibit photocatalytic reduction of CO 2 in DMF and acetonitrile solutions containing triethylamine (TEA) as a reductive quencher. [ 5 ] However, the catalytic efficiency of the homogeneous molecular catalytic system is relatively low and it is not easy to recycle the molecular catalysts from the reaction solution.…”

Recent Advances in the Use of CoPc-MWCNTs Nanocomposites as Electrochemical Sensing Materials

“…The use of cobalt phthalocyanine (CoPc) has been favored over other MPcs owing to its greater advantages such as high charge transfer capabilities [ 88 ], stability, high catalytic current density [ 89 ], reduced overpotential, diversify preparation methods, and high water-solubility [ 41 , 42 , 43 ]. It is also important to note the challenges researchers [ 75 , 90 ] encountered while using CoPc-MWCNTs nanocomposite as a sensing material.…”