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| Autori principali: | , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| Soggetti: | |
| Accesso online: | https://arxiv.org/abs/2606.01648 |
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| _version_ | 1866917553492721664 |
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| author | Mtangi, Wilbert Tassinari, Francesco Vankayala, Kiran Jentzsch, Andreas Vargas Adelizzi, Beatrice Palmans, Anja R. A. Fontanesi, Claudio Meijer, E. W. Naaman, Ron |
| author_facet | Mtangi, Wilbert Tassinari, Francesco Vankayala, Kiran Jentzsch, Andreas Vargas Adelizzi, Beatrice Palmans, Anja R. A. Fontanesi, Claudio Meijer, E. W. Naaman, Ron |
| contents | The production of hydrogen through water splitting in a photoelectrochemical cell suffers from an overpotential that limits the efficiencies. In addition, hydrogen-peroxide formation is identified as a competing process affecting the oxidative stability of photoelectrodes. We impose spin-selectivity by coating the anode with chiral organic semiconductors from helically-aggregated dyes as sensitizers; Zn-porphyrins and triarylamines. Hydrogen peroxide formation is dramatically suppressed, while the overall current through the cell, correlating with the water splitting process, is enhanced. Evidence for a strong spin-selection in the chiral semiconductors is presented by magnetic conducting (mc-)AFM measurements, where chiral and achiral Zn-porphyrins are compared. These findings contribute to our understanding of the underlying mechanism of spin selectivity in multiple electron-transfer reactions and pave the way towards better chiral dye-sensitized photoelectrochemical cells. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2606_01648 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Control of Electrons Spin Eliminates Hydrogen Peroxide Formation During Water Splitting Mtangi, Wilbert Tassinari, Francesco Vankayala, Kiran Jentzsch, Andreas Vargas Adelizzi, Beatrice Palmans, Anja R. A. Fontanesi, Claudio Meijer, E. W. Naaman, Ron Chemical Physics The production of hydrogen through water splitting in a photoelectrochemical cell suffers from an overpotential that limits the efficiencies. In addition, hydrogen-peroxide formation is identified as a competing process affecting the oxidative stability of photoelectrodes. We impose spin-selectivity by coating the anode with chiral organic semiconductors from helically-aggregated dyes as sensitizers; Zn-porphyrins and triarylamines. Hydrogen peroxide formation is dramatically suppressed, while the overall current through the cell, correlating with the water splitting process, is enhanced. Evidence for a strong spin-selection in the chiral semiconductors is presented by magnetic conducting (mc-)AFM measurements, where chiral and achiral Zn-porphyrins are compared. These findings contribute to our understanding of the underlying mechanism of spin selectivity in multiple electron-transfer reactions and pave the way towards better chiral dye-sensitized photoelectrochemical cells. |
| title | Control of Electrons Spin Eliminates Hydrogen Peroxide Formation During Water Splitting |
| topic | Chemical Physics |
| url | https://arxiv.org/abs/2606.01648 |