Journal Article

FZJ-2023-02004

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Tailoring the Acidity of Liquid Media with Ionizing Radiation: Rethinking the Acid–Base Correlation beyond pH

Fritsch, B. (Corresponding author)FZJ* ; Körner, A.FZJ* ; Couasnon, T. ; Blukis, R. ; Taherkhani, M. ; Benning, L. G. ; Jank, M. P. M. ; Spiecker, E. ; Hutzler, A. (Corresponding author)FZJ*

2023
ACS Washington, DC

This record in other databases:      

Please use a persistent id in citations: http://hdl.handle.net/2128/34537  doi:10.1021/acs.jpclett.3c00593

Abstract: Advanced in situ techniques based on electrons and X-rays are increasingly used to gain insights into fundamental processes in liquids. However, probing liquid samples with ionizing radiation changes the solution chemistry under observation. In this work, we show that a radiation-induced decrease in pH does not necessarily correlate to an increase in acidity of aqueous solutions. Thus, pH does not capture the acidity under irradiation. Using kinetic modeling of radiation chemistry, we introduce alternative measures of acidity (radiolytic acidity π* and radiolytic ion product KW*), that account for radiation-induced alterations of both H+ and OH– concentration. Moreover, we demonstrate that adding pH-neutral solutes such as LiCl, LiBr, or LiNO3 can trigger a significant change in π*. This provides a huge parameter space to tailor the acidity for in situ experiments involving ionizing radiation, as present in synchrotron facilities or during liquid-phase electron microscopy.

---

Contributing Institute(s):

1. Helmholtz-Institut Erlangen-Nürnberg Erneuerbare Energien (IEK-11)

Research Program(s):

1. 1122 - Design, Operation and Digitalization of the Future Energy Grids (POF4-112) (POF4-112)
2. GRK 1896 - GRK 1896: In-situ-Mikroskopie mit Elektronen, Röntgenstrahlen und Rastersonden (218975129) (218975129)
3. DFG project 53244630 - EXC 315: Neue Materialien und Prozesse - Hierarchische Strukturbildung für funktionale Bauteile (53244630) (53244630)

Appears in the scientific report 2023

---

Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Essential Science Indicators ; IF >= 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

---