This PhD opportunity at ESPCI Paris - PSL focuses on the development of innovative electrochemical microelectrode arrays for the treatment of seawater to capture and valorize CO2, contributing to the energy transition and negative-emission strategies. The project, supervised by Prof. Loïc Assaud and Dr. Alexandr Oshchepkov, is based at the Institute of Porous Materials of Paris (IMAP) and the Institute of Chemistry Biology Innovation (CBI), leveraging advanced laboratory infrastructure and interdisciplinary expertise.

The research aims to design and optimize reactor architectures that enable direct CO2 extraction from seawater using microelectrode arrays (MEAs), without the need for chemical additives or ion-exchange membranes. The approach involves local pH modulation near the electrode surface to shift the HCO3-/CO2 equilibrium, followed by electrochemical conversion of CO2 to CO, maintaining the bulk pH and minimizing unwanted carbonate precipitation. The project addresses key scientific challenges such as precise control of local pH gradients, catalyst optimization for high selectivity and low hydrogen evolution, and system stability under real seawater conditions.

Applicants should have a strong background in physical chemistry, electrochemistry, chemical or energy engineering, or materials chemistry. Experience in experimental electrochemistry, CAD tools for reactor design (e.g., Autodesk Fusion 360), and programming (e.g., Python) is highly desirable. Proficiency in English and an intermediate upper level of French are required, along with strong organizational and communication skills. The project is ideal for candidates interested in interdisciplinary research spanning catalyst synthesis, reactor engineering, and advanced characterization.

The PhD is fully funded for 36 months (starting October 1, 2026) through a doctoral contract from Ecole Doctorale ED397, with salary and conditions as per the Doctoral School's requirements. The application deadline is April 15, 2026. To apply, candidates should send a CV, motivation letter, and recommendation letters to the supervisors by email. For more information, candidates are encouraged to contact Prof. Assaud or Dr. Oshchepkov directly.

Keywords: CO2 capture, electrochemistry, materials science, seawater treatment, microelectrode arrays, catalysis, energy transition.