Recent advances in H2O2 electrosynthesis based on the application of gas diffusion electrodes: Challenges and opportunities

Over the past few years, the development of highly efficient alternative techniques for the in situ production of H2O2 via two-electron oxygen reduction reaction (2e(-)ORR) has been the focus of intense research in electrochemistry. This review presents an overview of the recent advances made in H2O2 electrosynthesis based on the application of gas diffusion electrodes (GDE) in the last three years. In the first section, we will be looking at the findings in the development of novel modified GDEs with a view to enhancing the activity and selectivity for 2e(-)ORR, and the novel methodologies that have been employed for the construction of GDEs. In the second section, we will delve into the advances in the H2O2 electro-generation in industrial scale and for the treatment of water and wastewater. Finally, we will be discussing about the challenges and opportunities related to the production of H2O2 via 2e(-)ORR.