Ben A. Johnson

We are searching for a PhD student to investigate the reaction mechanism of [FeFe]-hydrogenases and nitrogenases using time-resolved crystallography at Uppsala University.
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lnkd.in/ews9CHse

+a we have a two year postdoc position (cv and cover letter to moritz.senger@kemi.uu.se)

Beyond diffusion: ion and electron migration contribute to charge transport in redox-conducting metal–organic frameworks Electrical conductivity through redox conducting MOFs (RCMOFs) proceeds by electron hopping between linkers of differing oxidation states. While this process is treated as a purely diffusional process...

What's rate-limiting in (redox) conductive MOFs: electron or ion diffusion? Turns out, neither. Instead, we find that slow ion diffusion generates an electric field that accelerates charge transport. Excited to share our recent paper out now in ChemSci! #ChemSky

pubs.rsc.org/en/Content/A...

A Geometric Interpretation of Kinetic Zone Diagrams in Electrochemistry Electrochemical systems with increasing complexity are gaining importance in catalytic energy conversion applications. Due to the interplay between transport phenomena and chemical kinetics, predicting optimization is a challenge, with numerous parameters controlling the overall performance. Zone diagrams provide a way to identify specific kinetic regimes and track how variations in the governing parameters translate the system between either adverse or optimal kinetic states. However, the current procedures for constructing zone diagrams are restricted to simplified systems with a minimal number of governing parameters. We present a computationally based method that maps the entire parameter space of multidimensional electrochemical systems and automatically identifies kinetic regimes. Once the current output over a discrete set of parameters is interpreted as a geometric surface, its geometry encodes all of the information needed to construct a zone diagram. Zone boundaries and limiting zones are defined by curved and flat regions, respectively. This geometric framework enables a systematic exploration of the parameter space, which is not readily accessible by analytical or direct numerical methods. This will become increasingly valuable for the rational design of electrochemical systems with intrinsically high complexity.

Introducing a new, automated approach for constructing Zone Diagrams in #Electrochemistry. Check out how it is possible to decipher complexity in electrochemical systems through the lens of geometry, out now in JACS! #ChemSky pubs.acs.org/doi/10.1021/...

Excited to be here! Kicking things off by celebrating all things Electrochemistry! ⚡ What I love most about Electrochemistry is how it often establishes connections between seemingly unrelated concepts. What about you? #ChemSky

Fellow electrochemist reporting in—would love to be part of the starter pack! ⚡