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Instruments / Technical Area	Publication Details	Published	Actions
	Spin matters: a multidisciplinary roadmap to understanding spin effects in oxygen evolution reaction during water electrolysis Emma Van Der Minne , Priscila Vensaus , Vadim Ratovskii , Seenivasan Hariharan , Jan Behrends , Cesare Franchini , Jonas Fransson , Sarnjeet S. Dhesi , Felix Gunkel , Florian Gossing , Georgios Katsoukis , Ulrike I. Kramm , Magalí Lingenfelder , Qianqian Lan , Yury V. Kolen'Ko , Yang Li , Ramsundar Rani Mohan , Jeffrey Mccord , Lingmei Ni , Eva Pavarini , Rossitza Pentcheva , David H. Waldeck , Michael Verhage , Anke Yu , Zhichuan J. Xu , Piero Torelli , Silvia Mauri , Narcis Avarvari , Anja Bieberle-Hütter , Christoph Baeumer Advanced Energy Materials 5 DOI: 10.1002/aenm.202503556 Open Access Show Abstract ▼ Abstract: A central challenge in water electrolysis lies with the oxygen evolution reaction (OER) where the formation of molecular oxygen (O2) is hindered by the constraint of angular momentum conservation. While the reactants OH− or H2O are diamagnetic (DM), the O2 product has a paramagnetic (PM) triplet ground state, requiring a change in spin configuration when being formed. This constraint has prompted interest in spin-selective catalysts as a means to facilitate OER. In this context, the roles of magnetism and chirality-induced spin selectivity (CISS) in promoting the OER reaction have recently been investigated through both theoretical and experimental studies. However, pinpointing the key principles and their relative contribution in mediating spin-enhancement remains a significant challenge. This roadmap offers a forward-looking perspective on current experimental trends and theoretical developments in spin-enhanced OER electrocatalysis and outlines strategic directions for integrating incisive experiments and operando approaches with computational modeling to disentangle key mechanisms. By providing a conceptual framework and identifying critical knowledge gaps, this perspective aims to guide researchers toward dedicated experimental and computational studies that will deepen the understanding of spin-induced OER enhancement and accelerate the development of next-generation catalysts.	Oct 2025
I07-Surface & interface diffraction	Electrically detected magnetic resonance in ambipolar polymer field-effect transistors Zichen Wang , Ilia Kulikov , Tarig Mustafa , Sam Schott , Remington L. Carey , Jan Behrends , Henning Sirringhaus Physical Review Letters 135 DOI: 10.1103/7b3m-8zvz Diamond Proposal Number(s): [35227] Open Access Show Abstract ▼ Abstract: Electron spin resonance can provide unique insights into charge transport processes in organic semiconductors in a regime in which charge motion determines spin relaxation. In particular, electrically detected magnetic resonance (EDMR) probes directly the changes in charge transport properties that are sensitive to magnetic resonance excitation. Here, we present a systematic study of continuous-wave EDMR on conjugated polymer field-effect transistors (FETs) that can be operated in both unipolar as well as ambipolar regimes. We show that, in addition to a narrow, electron-hole recombination-induced EDMR signal that can only be detected in the ambipolar regime, there is also a broad EDMR signal when devices are operated in both unipolar and ambipolar regions. We attribute this signal to a spin blockade mechanism induced when mobile carriers encounter trapped charges along the charge transport percolation pathways and study its dependence on biasing conditions and temperature. The spin-blockade EDMR signature is also observed in conjugated polymer FETs that exhibit only unipolar operation. Our findings show that EDMR provides a powerful technique to study the role of spin blockade and bipolaron formation on the charge transport properties of a wide range of conjugated polymers.	Oct 2025

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