Shelley Minteer

Understanding Palladium Ion Induced Bioelectrocatalysis in Shewanella oneidensis MR-1 through Electrochemical and Genetic Interrogations Efficient extracellular electron transfer (EET) is critical to harnessing bacteria like Shewanella oneidensis MR-1 in microbial electrochemical systems (MESs) aimed at sustainable energy production, environmental remediation, and resource recovery. This study investigates how palladium ions (Pd2+), which are of significant interest for catalysis and resource recovery, impact the bioelectrocatalysis of S. oneidensis MR-1 using electrochemical, transcriptomic, and microscopic methods. Pd2+ exposure significantly increased the observed current via EET, which correlated with substantially increased viable biofilm formation on the electrode. Transcriptomics revealed a coordinated cellular response, including upregulation of genes facilitating EET (the Mtr pathway), metabolism, motility, and biofilm processes, alongside downregulation of competing pathways. Cellular reduction of Pd2+ to palladium nanoparticles, mainly near the outer membrane, was confirmed via microscopy. Pd2+ boosts S. oneidensis MR-1 bioelectrocatalysis through the combined effects of promoting biofilm development and upregulating essential cellular pathways, informing fundamental strategies for enhanced MESs targeted for sustainable engineering, bioremediation, and resource and material recovery applications.

Nice work, Ash!! Understanding Palladium Ion Induced Bioelectrocatalysis in Shewanella oneidensis MR-1 through Electrochemical and Genetic Interrogations | ACS Electrochemistry pubs.acs.org/doi/full/10....

Missouri S&T awarded five-year $19.8 million grant to lead Center for Chemical Innovation Missouri S&T has been awarded a $19.8 million collaborative agreement to renew the National Science Foundation’s Center for Synthetic Organic Electrochemistry. This chemical innovation center will be ...

CSOE is super excited to be renewed!!! Missouri S&T awarded five-year $19.8 million grant to lead Center for Chemical Innovation news.mst.edu/2025/08/miss...

So excited about our open access Tutorials for new researchers!! Introducing the Tutorial Manuscript Type at the ACS Au Community Journals | ACS Measurement Science Au pubs.acs.org/doi/10.1021/...

Well, this has been a fun week for the ACS Measurement Science Au. pubs.acs.org/journal/amachv
I was glad to see our impact factor at 9.0.

Great job to Adam and the team!!! Tricatalytic Organocatalyst–Enzyme Hybrid Cascade for Improving Complete Oxidation of Glucose to Carbon Dioxide | ACS Catalysis pubs.acs.org/doi/10.1021/...

Enhanced Biofuel Cells Based on a Hybrid Enzymatic/Bimetallic Composite for Complete Lactate Catalytic Electrooxidation We describe complete lactate electrooxidation in an enzymatic biofuel cell that combines the catalytic action of the bimetallic composite Ru@Pt-CNT and the enzyme oxalate oxidase (OxOx). The Ru@Pt-CNT...

Congrats to Jefferson!!! Enhanced Biofuel Cells Based on a Hybrid Enzymatic/Bimetallic Composite for Complete Lactate Catalytic Electrooxidation | ACS Materials Au pubs.acs.org/doi/10.1021/...

Electrochemical Observation and pH Dependence of All Three Expected Redox Couples in an Extremophilic Bifurcating Electron Transfer Flavoprotein with Fused Subunits Bifurcating enzymes employ energy from a favorable electron transfer to drive unfavorable transfer of a second electron, thereby generating a more reactive product. They are therefore highly desirable in catalytic systems, for example, to drive challenging reactions such as nitrogen fixation. While most bifurcating enzymes contain air-sensitive metal centers, bifurcating electron transfer flavoproteins (bETFs) employ flavins. However, they have not been successfully deployed on electrodes. Herein, we demonstrate immobilization and expected thermodynamic reactivity of a bETF from a hyperthermophilic archaeon, Sulfolobus acidocaldarius (SaETF). SaETF differs from previously biochemically characterized bETFs in being a single protein, representing a concatenation of the two subunits of known ETFs. However, SaETF retains the chemical properties of heterodimeric bETFs, including possession of two FADs: one that undergoes sequential 1-electron (1e) reductions at high E° and forms an anionic semiquinone, and another that is amenable to lower-E° 2e reduction, including by NADH. We found homologous monomeric ETF genes in archaeal and bacterial genomes, accompanied by genes that also commonly flank heterodimeric ETFs, and SaETF’s sequence conservation is 50% higher with bETFs than with canonical ETFs. Thus, SaETF is best described as a bETF. Our direct electrochemical trials capture reversible redox couples for all three thermodynamically expected redox events. We document electrochemical activity over a range of pH values and reveal a conformational change coupled to proton acquisition that affects the electrochemical activity of the higher-E° FAD. Thus, this well-behaved monomeric bETF opens the door to bioinspired bifurcating devices or bifurcation on a chip.

So excited about this collaboration with Anne-Frances Miller's Lab!!! Electrochemical Observation and pH Dependence of All Three Expected Redox Couples in an Extremophilic Bifurcating Electron Transfer Flavoprotein with Fused Subunits | JACS Au pubs.acs.org/doi/10.1021/...

So excited for the 2024 Rising Stars special issue in Bio and Med Chem!!!! pubs.acs.org/page/abmcb8/...

Welcoming @nsf-csoe.bsky.social to BlueSky! Please follow to get exciting updates on the activities of the NSF Center for Synthetic Organic Electrochemistry!!!

Congrats!!!

Congratulations to the 2024 Rising Stars from ACS Materials Au!!! pubs.acs.org/page/amacgu/...

2024 Rising Stars in Measurement Science Published research on topics of current scientific interest.

So excited for the 2024 Rising Stars in Measurement Science Virtual Special Issue!!! pubs.acs.org/page/amachv/...

Electrosynthesis goes wireless Light-powered microelectronics enable high-throughput experimentation

Researchers created wireless light-powered microelectronic devices that can turn nearly any well plate into an array of teeny-tiny electrochemical reactors, enabling truly high-throughput electrochemistry. cen.acs.org/synthesis/El... #chemsky🧪 #scinews

Thanks for picking Zach's review!!!!

Ultrafast spectroscopy of chemical transformations Published research on topics of current scientific interest.

A new Au journal virtual special issue on ultrafast spectroscopy!!!

pubs.acs.org/page/apcach/...!

It is St. Pat's weekend which is big tradition in Rolla.

Join us for an exclusive Missouri S&T Visit Weekend! March 14-16, 2025. Tour our state-of-the-art facilities, meet our world-class faculty and students, explore exciting research opportunities, and participate in many other social activities!

Register here: connect.mst.edu/register/?id...

Accelerated Electrocatalyst Degradation Testing by Accurate and Robust Forecasting of Multidimensional Kinetic Model with Bayesian Data Assimilation Degradation tests represent a significant bottleneck in electrochemical technology development, occasionally requiring tens of thousands of hours. Thus, reliable degradation forecasting in a short time frame is a game-changer in accelerating the establishment of future electrochemical devices. Herein, we show a multidimensional kinetic model for electrocatalyst degradation by quantifying the relationship among potential, current, and time, applicable under various conditions. Aiming to predict reliable degradation behaviors in shorter experimental timeframes and inspired by modern weather forecasting methods, we integrated Bayesian data assimilation with our model to expedite multidimensional parameter optimization. Consequently, we achieved accurate and robust forecasting of electrocatalyst lifetime by employing oxygen evolution reaction as a representative system: it takes just 300 h to obtain the final lifetime of close to 1000 h even with environmental noise. This data-driven approach can accelerate our understanding of the microscopic electrochemical mechanisms and simultaneously directly bridge this understanding to develop next-generation energy technologies.

#OA article
Accelerated Electrocatalyst Degradation Testing by Accurate and Robust Forecasting of Multidimensional Kinetic Model with Bayesian Data Assimilation | ACS Energy Letters pubs.acs.org/doi/10.1021/...

The Society for Electroanalytical Chemistry is excited to announce the 5th SEAC Student Group Meeting, held on 3/01/2025 in Boston, MA.
•Participation in this meeting is open to students (graduate, undergraduate) and postdoctoral associates forms.gle/BdTwtkseG3mj...
#chemsky #SEAC #electrochem

Call For Nominations: ACS Au Journals 2025 Rising Stars | ACS Publications Chemistry Blog These Special Issues will showcase original, cutting-edge research from across the chemical sciences, highlighting the early-career researchers conducting work at the forefront of these fields. Submit...

Nominations are now open for the 2025 Rising Stars at ACS Au. Please nominate your best early career scientists and engineers!!!
axial.acs.org/cross-discip...

Students in a classroom discussing electrochemistry

Packed house for the first ever Electrochemical Society student chapter meeting at the University of Oregon! chemsky 🧪 electrochemsky ⚡

Awesome paper!!!

Does it have to have lightning bolts? It makes electrochemistry seem like voodoo and black magic. Just saying.