Effects of Iron Impurities and Content on Electrochemical Performance and Oxygen Evolution Selectivity of Nickel Catalysts for Ethanol Oxidation
Cyclic voltammetry and operando EC-MS show that iron impurities affect nickel ethanol-oxidation catalysts very differently depending on their origin: trace Fe from electrolyte impurities has minimal impact, while codeposited Fe significantly suppresses catalytic current, roughly halving it at 1.5 V RHE.
Nano-Perforated Silicon Membrane with Monolithically Integrated Buried Cavity
A wafer-scale fabrication process builds monolithically suspended nano-perforated silicon membranes with integrated support structures, using a cyclic DREM process to directionally etch 300 nm, high-aspect-ratio nanopores at 700 nm pitch, then forms a buried cavity beneath them via isotropic etching for a thick, mechanically robust NPM.
Be Aware of Transient Dissolution Processes in Co3O4 Acidic Oxygen Evolution Reaction Electrocatalysts
Using online inductively coupled plasma mass spectrometry, identical-location STEM, and differential electrochemical mass spectrometry, this study identifies transient dissolution processes governing the degradation of a model Co3O4 porous catalyst for the acidic oxygen evolution reaction, a promising iridium-free OER alternative.
Electrolyte Anions Suppress Hydrogen Generation in Electrochemical CO Reduction on Cu
Using electrochemistry-mass spectrometry, this study shows that halide electrolyte anions suppress the undesired hydrogen evolution reaction during electrochemical CO2 and CO reduction on Cu, with H2 production decreasing in the order KF > KCl > KI, while CO reduction shows the inverse trend, explained via a mechanism linking halide anions to classical molecular dynamics simulations.
Propane Activation on Pt Electrodes at Room Temperature: Quantification of Adsorbate Identity and Coverage
Combining electrochemical mass spectrometry with density functional theory, this study quantifies propane activation on Pt electrodes at room temperature, identifying adsorbate identity and coverage for a low-temperature, electrified alternative to carbon-intensive thermal C-H activation.
Insights Into Electrocatalytic Hydrogenation of Furfural on Nanoparticulate Pd/C Under Acidic Conditions
By directly coupling electrochemistry with mass spectrometry, this study deconvolutes the hydrogen evolution reaction from electrocatalytic hydrogenation of furfural on carbon-supported palladium nanoparticles under acidic conditions, extracting Tafel slopes and showing the reaction proceeds via a Langmuir-Hinshelwood mechanism rather than proton-coupled electron transfer, with furfuryl alcohol blocking the surface.
Direct Electrocatalytic Propylene Epoxidation on PdOx and PtOx
Using in situ electrochemical mass spectrometry to overcome the ex situ detection challenges of unstable propylene oxide in aqueous media, this study investigates direct electrocatalytic propylene epoxidation on PtOx and PdOx noble metal oxide catalysts, probing reaction mechanisms to improve yield and selectivity toward industrial requirements.
Advancing Insights into Electrochemical Pre-Treatments of Supported Nanoparticle Electrocatalysts by Combining a Design of Experiments Strategy with In Situ Characterization
Using a design-of-experiments strategy combined with in situ characterization, this study investigates how five electrochemical pre-treatment parameters affect carbon-supported Pt-nanoparticle catalysts, linking physical properties to performance on the oxygen reduction reaction.
Allotrope-dependent activity-stability relationships of molybdenum sulfide hydrogen evolution electrocatalysts
Nature Communications study: molybdenum sulfide hydrogen evolution stability is allotrope-dependent — lamellar MoS₂ degrades at open circuit, amorphous MoS₃ₓ loses sulfur during HER.
Real-Time Detection of Acetaldehyde in Electrochemical CO Reduction on Cu Single Crystal
ACS Energy Letters study: real-time EC-MS detection reveals acetaldehyde’s role in electrochemical CO reduction on Cu single crystals, and its fast non-Faradaic oxidation to acetate in alkaline media.