Publication date: 10th April 2024
Proton-conducting ceramic cells are emerging as promising alternatives to conventional oxygen ion-conducting devices, offering the potential for low-temperature operation in next-generation energy technologies [1-3]. Despite their promise, a detailed understanding of the electrochemical reactions at the electrodes of proton-conducting ceramic cells remains elusive, impeded by the complex nature of these reactions and a gap in knowledge concerning electrode materials. Notably, the use of model electrodes for in-depth mechanistic studies [4-6]—commonplace in the research of traditional oxygen ion-conducting fuel cells—is scarce for proton-conducting counterparts.
This study focuses on fundamental research of the electrochemical reactions occurring at the fuel electrode surface in proton-conducting cells. Metal patterned BaZr0.4Ce0.4Y0.1Yb0.1O3−δ model composite electrodes are utilized to investigate the electrode reactions. Impedance analysis is conducted under various hydrogen partial pressures and applied voltages to analyze the electrochemical activity. Additionally, in-operando X-ray photoelectron spectroscopy is employed to perform real-time surface chemical analysis under high-temperature with hydrogen exposure conditions and over-potentials. This comprehensive analysis lead to the identification of triple phase boundaries as the dominant active sites and the charge transfer step of protons to metal as the RDS for the hydrogen incorporation reaction among 45 candidate steps. The findings contribute to a comprehensive understanding of the electrochemical processes in proton-conducting ceramic fuel cells, providing valuable insights for the design of fuel electrode materials.
nanoGe is a prestigious brand of successful science conferences that are developed along the year in different areas of the world since 2009. Our worldwide conferences cover cutting-edge materials topics like perovskite solar cells, photovoltaics, optoelectronics, solar fuel conversion, surface science, catalysis and two-dimensional materials, among many others.
Previously nanoGe Spring Meeting (NSM) and nanoGe Fall Meeting (NFM), MATSUS is a multiple symposia conference focused on a broad set of topics of advanced materials preparation, their fundamental properties, and their applications, in fields such as renewable energy, photovoltaics, lighting, semiconductor quantum dots, 2-D materials synthesis, charge carriers dynamics, microscopy and spectroscopy semiconductors fundamentals, etc.
International Conference on Hybrid and Organic Photovoltaics
International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
The main topics of the Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP) are discussed every year in Asia-Pacific for gathering the recent advances in the fields of material preparation, modeling and fabrication of perovskite and hybrid and organic materials. Photovoltaic devices are analyzed from fundamental physics and materials properties to a broad set of applications. The conference also covers the developments of perovskite optoelectronics, including light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.
The International Conference on Perovskite Thin Film Photovoltaics Perovskite Photonics and Optoelectronics (NIPHO) is the best place to hear the latest developments in perovskite solar cells as well as on recent advances in the fields of perovskite light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.