Photoelectrocatalytic Reduction of Carbon Dioxide to Methanol Using CuFe₂O₄ Modified with Graphene Oxide under Visible Light Irradiation

Abstract

Photoelectrocatalytic reduction of CO 2 into valuable products can provide energy in a sustainable way with leveling off of the concentration of CO 2 in our environment. In this study, graphene oxide (GO) incorporated with copper ferrite (CuFe 2 O 4 ) has been employed to enhance photoelectrocatalytic CO 2 reduction under visible light. The TEM and XPS characterization indicated a strong interaction between the CuFe 2 O 4 and GO in the hybrid catalyst. The GO incorporation reduced the e − /h + recombination in the hybrid catalyst by trapping the photoexcited electrons from CuFe 2 O 4 leading to high methanol yield of 28.8 μmol L −1 cm −2 at 20.5% quantum efficiency. The incident photon current efficiency (IPCE) and Faradaic efficiency for methanol formation were observed as 8.02% and 87%, respectively. The results showed that the photoelectrocatalytic activity for CO 2 reduction can be improved by incorporating GO with CuFe 2 O 4 , and it provides a universal platform to fabricate GO−CuFe 2 O 4 based hybrid photocatalyst with promising applications in CO 2 reduction.

Organic Electron Donor‐Acceptor Co‐intercalated NiMn‐LDHs – Photocatalysts with Enhanced Separation of Charge Carriers for Photocatalytic Reduction of CO2

“…As shown in Figure 3a and Figure 3b, pure DAS and DNS had strong absorption bands located at 200–400 nm and 200–500 nm, respectively, while weak absorption in the range of 500–800 nm were detected. Bare Ni 2 Mn−CO 3 exhibited mainly two absorption bands in the UV and visible‐light regions [27] . The absorption band in the UV region (200 to 300 nm) could be assigned to ligand‐to‐metal charge transfer (LMCT) from the O 2p orbital to the 3d orbitals of Ni 2+ /Mn 3+ ions [28] .…”

Easily Recycled CuMgFe Catalysts Derived from Layered Double Hydroxides for Hydrogenolysis of Glycerol

“…All Fe 2p spectra in Figure 5b showed two main peaks at 710.9-711.1 eV and 724.2-724.5 eV, which belonged to Fe 2p 3/2 and Fe 2p 1/2 , respectively. Two accompanying satellite peaks at the binding energies of 718.5-718.8 eV and 732.3-732.8 eV were characteristics of Fe 3+ cations [38][39][40]. Mg 1s spectra of CuMgFe-xLDO catalysts are also presented in Figure 5c.…”

Sonochemical Fabrication of s‐Scheme Hierarchical CdS/BiOBr Heterojunction Photocatalyst with High Performance for Carbon Dioxide Reduction

“…Up to now, numerous methods such as photocatalytic reduction, electrocatalytic reduction, biological transformation, hydrogenation, and dry reforming [ 5–8 ] have been explored to convert CO 2 into high‐value‐added chemicals. Among these methods, photocatalysis has been paid much attention due to non‐toxic, cheapness and excellent stability.…”