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A-LEAF, a full device for artificial photosynthesis
http://www.iciq.org/wp-content/uploads/2016/11/NdP-ALEAF-English.pdf[font face=Serif]PRESS RELEASE
Tarragona, 24th November, 2016
[font size=5]A-LEAF, a full device for artificial photosynthesis[/font]
[font size=4]ICIQ leads a project awarded with €8 million by the European Comission[/font]
[font size=3]
Tarragona, 24th November, 2016
[font size=5]A-LEAF, a full device for artificial photosynthesis[/font]
[font size=4]ICIQ leads a project awarded with €8 million by the European Comission[/font]
[font size=3]
- Project A-LEAF: “An Artificial Leaf: a photo-electro-catalytic cell from earth- abundant materials for sustainable solar production of CO₂-based chemicals and fuels” receives funding from the FET Proactive 2016 call within the Horizon 2020 programme.
- With nearly 8 million euros, A-LEAF is one of the biggest artificial photosynthesis research projects funded by the European Commission.
- A-LEAF aims to build a photovoltaic device able to reproduce the complete process of photosynthesis to obtain clean fuels and raw materials using exclusively sunlight, water and CO₂.
- Coordinated by Prof. José Ramón Galán-Mascarós from ICIQ, the project counts with 13 partner institutions from 8 different countries. A-LEAF will start next January 2017 and will last 48 months.
http://www.iciq.org/key-intermediate-of-water-oxidation-and-oxygen-reduction-identified/
[font face=Serif][font size=5]Key intermediate of water oxidation and oxygen reduction identified[/font]
November 28, 2016
[font size=3]The research group of Prof. Antoni Llobet used a combination of techniques to trap a superoxido intermediate involved in the water oxidation reaction.
Water oxidation is often considered the bottleneck of the water splitting process. Years ago, Prof. Llobet was among the first chemists to achieve this reaction using a bimetallic ruthenium molecular catalyst. Later, he also described an analogous catalyst based on cobalt, an earth abundant metal that is preferred from an environmental and economic point of view. Now, he led the team of researchers that discovered a derivative superoxido dicobalt complex that provides unique information for the understanding of the mechanism of the reaction.
[center]
[font size=1]Raman resonance spectra of the peroxido and superoxido cobalt complexes.[/font][/center]
Scientists have used a myriad of techniques to ‘capture’ this elusive intermediate. Among them, they used Raman spectroscopy to identify the characteristic peaks associated with the O-O bond vibration of peroxido and superoxido species. Llobet and co-workers used labelled O₂ to further confirm the existence of this complex. The team also carried out DFT calculations, EPR and X-ray absorption spectroscopy analyses that supported their suggested mechanism.
To demonstrate that the oxygen atoms coordinated to the cobalt were ultimately the same involved in the oxygen evolution step, researchers used different oxygen isotopologues and on-line mass spectrometry. When pushing the reaction forward using an external oxidiser, they observed that the isotopic profile of O₂ gas matched the ratios in the labelled starting materials.
…[/font][/font]
http://pubs.acs.org/doi/abs/10.1021/jacs.6b08532November 28, 2016
[font size=3]The research group of Prof. Antoni Llobet used a combination of techniques to trap a superoxido intermediate involved in the water oxidation reaction.
Water oxidation is often considered the bottleneck of the water splitting process. Years ago, Prof. Llobet was among the first chemists to achieve this reaction using a bimetallic ruthenium molecular catalyst. Later, he also described an analogous catalyst based on cobalt, an earth abundant metal that is preferred from an environmental and economic point of view. Now, he led the team of researchers that discovered a derivative superoxido dicobalt complex that provides unique information for the understanding of the mechanism of the reaction.
[center]
[font size=1]Raman resonance spectra of the peroxido and superoxido cobalt complexes.[/font][/center]
Scientists have used a myriad of techniques to ‘capture’ this elusive intermediate. Among them, they used Raman spectroscopy to identify the characteristic peaks associated with the O-O bond vibration of peroxido and superoxido species. Llobet and co-workers used labelled O₂ to further confirm the existence of this complex. The team also carried out DFT calculations, EPR and X-ray absorption spectroscopy analyses that supported their suggested mechanism.
To demonstrate that the oxygen atoms coordinated to the cobalt were ultimately the same involved in the oxygen evolution step, researchers used different oxygen isotopologues and on-line mass spectrometry. When pushing the reaction forward using an external oxidiser, they observed that the isotopic profile of O₂ gas matched the ratios in the labelled starting materials.
…[/font][/font]