TY  - JOUR
A1  - Thomä, Sabrina L. J.
A1  - Zobel, Mirijam
T1  - Beam‐induced redox chemistry in iron oxide nanoparticle dispersions at ESRF–EBS
Y1  - 2023-01-13
VL  - 30
IS  - 2
SP  - 440
EP  - 444
JF  - Journal of Synchrotron Radiation
DO  - 10.1107/S1600577522011523
PB  - International Union of Crystallography
N2  - The storage ring upgrade of the European Synchrotron Radiation Facility makes ESRF–EBS the most brilliant high‐energy fourth‐generation light source, enabling in situ studies with unprecedented time resolution. While radiation damage is commonly associated with degradation of organic matter such as ionic liquids or polymers in the synchrotron beam, this study clearly shows that highly brilliant X‐ray beams readily induce structural changes and beam damage in inorganic matter, too. Here, the reduction of Fe3+ to Fe2+ in iron oxide nanoparticles by radicals in the brilliant ESRF–EBS beam, not observed before the upgrade, is reported. Radicals are created due to radiolysis of an EtOH–H2O mixture with low EtOH concentration (∼6 vol%). In light of extended irradiation times during insitu experiments in, for example, battery and catalysis research, beam‐induced redox chemistry needs to be understood for proper interpretation of insitu data.
N2  - With the increased brilliance at the European Research Facility–Extremely Brilliant Source (ESRF–EBS), a beam‐induced reduction of non‐stochiometric iron oxide nanoparticles (almost maghemite composition) to magnetite was observed in a mixture of ethanol and water with low ethanol concentration.
UR  - http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/11451
ER  -