Electroanalytical Implications of an Interfacial Insulating Metal Oxide Layer: Impact of a Porous Cr2O3–Ga2O3 Layer on Electron Transfer and Heterogeneous Electrocatalysis
Year: 2025
Type: article
Abstract: High Resolution Image Download MS PowerPoint Slide The electrochemical reduction of CO 2 into 1-butanol with high faradaic efficiencies (42%) using what has been described as a Ni-enhanced Cr 2 O 3 –Ga 2 O 3 modified glassy carbon electrode provides a new electrochemical methodology for CO 2 utilization. Currently, the associated charge transfer dynamics and interfacial character that allow this reactivity are not well understood. Here, the electrochemical characteristics of the Cr 2 O 3 –Ga 2 O 3 interface are explored using a toolkit of redox probes to study the electron transfer, proton transfer, and mass transfer characteristics of the electrode. Addition of the Cr 2 O 3 –Ga 2 O 3 coating introduces a significant change in the electrochemical double layer characteristics, which is in part due to the underlying nanostructure of the oxide coating. This environment improves the electron and proton transfer rates, as well as increases the concentration of reactive species near the electrode. Much of this improvement is associated with the porous nonconducting nature of the oxide layer. These findings offer an improved understanding of the electrode and electrocatalytic nature needed to undertake the reduction of CO 2 to produce carbon–carbon bonded products.
Source: ACS electrochemistry.
Authors: Alma Paola Hernandez-Gonzalez, Stephanie Dulovic, Guangming Cheng, Cynthia Bian, Alyssa Ritchie, Andrew Bocarsly
Institution: Princeton University
Language: English
Field: Energy
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W4413370600