Proceedings of September Meeting 2016 (NFM16)
Publication date: 14th June 2016
Herein, non-noble metal electrocatalysts are reported for efficient and selective reduction of CO2 to CO over a wide potential range, using In or Sn modified Cu surfaces. The bimetallic electrode was prepared through the electrodeposition of In or Sn species on the surface of copper that was oxidized and re-reduced. The Cu surface, when decorated with an optimal amount of second metal (Sn or In), resulted in a Faradaic efficiency (FE) for CO greater than 90% with appreciable current density starting at −0.6 V vs RHE or more negative potentials. X-ray diffraction (XRD) suggests the formation of Cu−In and Cu−Sn alloy. Auger electron spectroscopy of the sample surface exhibits zerovalent Cu, In and Sn after the electrodeposition step. Density functional theory (DFT) calculations show that replacing a single Cu atom with an In or a Sn atom leaves the d-band orbitals mostly unperturbed, signifying no dramatic shifts in the bulk electronic structure. However, the In or Sn atom discomposes the multifold sites on pure Cu, disfavoring the adsorption of H and leaving the adsorption of CO relatively unperturbed. Our catalytic results along with DFT calculations indicate that the presence of In or Sn on reduced Cu diminishes the hydrogenation capability, i.e., the selectivity toward H2 and HCOOH, while hardly affects the CO productivity. While the pristine monometallic surfaces (Cu, In and Sn) fail to selectively reduce CO2, the Cu−In and Cu−Sn bimetallic electrocatalysts generate a surface that inhibits adsorbed H*, resulting in improved CO FE. This study presents a strategy to provide low-cost non-noble metals with ubiquitous elements that can be utilized as a highly selective electrocatalyst for the efficient aqueous reduction of CO2.
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.