Proceedings of MATSUS Fall 2023 Conference (MATSUSFall23)
DOI: https://doi.org/10.29363/nanoge.matsus.2023.295
Publication date: 18th July 2023
Climate change concerns have spurred a growing interest in developing environmentally friendly technologies for energy generation, and the electrochemical reduction of CO2 (CO2RR) into value-added chemicals offers a possibility to store renewable energy into chemical bonds. It is therefore of particular interest to develop efficient, selective and durable electrocatalysts. The latter requires fundamental understanding of their structure and surface composition under reaction conditions.
This talk will illustrate how of a multi-technique in-situ/operando experimental approach is able provide in depth mechanistic insights into CO2RR. A synergistic combination of LC-TEM, EC-AFM, NAP-XPS, XAS, XRD, GC/MS, and Raman Spectroscopy, coupled with machine learning-based data analysis, has been employed to investigate the evolution of the structure/composition of mono (Cu2O) and bimetallic (ZnO@Cu2O) cubic nanoparticles and single atom (M-N-C, with M=Fe, Sn, Cu, Co, Ni, Zn) CO2RR electrocatalysts under reaction conditions.
A main aspect that I will discuss is the use of periodic potential pulses to alter the product selectivity toward desired high order hydrocarbons and alcohols. By screening a variety of product-steering pulse-length conditions for pre-reduced Cu2O nanocubes, we identified a critical role of the formation of Cu-Oad or CuOx/(OH)y species as well as the importance of having an optimal OHad versus COad catalyst surface coverage during CO2RR. For the ZnO@Cu2O system, we have further unveiled the role of the dynamic interplay between Zn Oxide, CuZn alloy, and metallic Zn formation, the evolution of Cu crystallites, and the adsorption behavior of CO and OH species. These findings pave the road toward improved catalyst design for non-conventional dynamic CO2RR reaction conditions.
In addition, metal-nitrogen-doped carbons (M-N-C) will be discussed as emerging cost-effective CO2RR catalysts, with emphasis in the study of their stability during operation. Here operando XAS data revealed drastic differences in the structural evolution of the different M-N-C materials, including reversibly formation of metallic clusters for some of the M-N-Cs studied that can be used to rationalize their distinct electrocatalytic performance and durability.
Finally, our studies are expected to open up new routes for the reutilization of CO2 through its direct conversion into industrially valuable chemicals and fuels.
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.