MoS2 Degradation Dynamics under Simulated Diurnal (Photo)electrochemical H2 Evolution Reaction Conditions
Using combined electrochemical methods, online ICP-MS, operando EC-MS, and Raman spectroscopy, this study tracks MoS2 degradation dynamics on Mo/MoS2-coated Si photoelectrodes under simulated diurnal (photo)electrochemical hydrogen evolution reaction conditions, revealing how day-night cycling microenvironments affect durability.
Aqueous eutectic electrolytes suppress oxygen and hydrogen evolution for long-life Zn||MnO2 dual-electrode-free batteries
Deep eutectic aqueous-organic electrolytes disrupt water’s hydrogen-bonding network, simultaneously suppressing hydrogen evolution at the zinc anode and enhancing MnO2 reversibility at the cathode, enabling long-life, non-flammable Zn||MnO2 dual-electrode-free batteries.
Revealing the lithium solid electrolyte interphase in liquid electrolytes via in situ Fourier transform infrared spectroscopy
In situ Fourier-transform infrared spectroscopy directly probes the potential- and cycling-dependent formation of the lithium solid electrolyte interphase in EC and EMC carbonate electrolytes, linking interfacial chemistry (LEDC- vs LEC-dominated SEI) to Coulombic efficiency of up to ~90%.
Dynamic Quantification of Nitrogen Species in Acidic Titanium-Catalyzed Nitrate Reduction toward Ammonia
Combining gas chromatography, ion chromatography, and other high-sensitivity, time-resolved methods, this study dynamically quantifies transient nitrogen species during titanium-catalyzed nitrate reduction toward ammonia in acidic electrolytes, resolving reaction intermediates and products.
Multiple-Benefit Electrolyzer for Desalination and Co-Production of H2 and Acetone
A three-chamber multiple benefit electrolyzer integrates electrodialysis desalination, isopropanol valorization, and hydrogen production in a single platform, using a phosphorus-modified NiMo-oxide catalyst (NiMoO-P@Ni-350) to selectively convert isopropanol into value-added acetone while driving efficient, sustainable desalination.
Resting but not idle: unveiling the mechanistic origin of resting losses for zinc anodes
Resting losses for zinc anodes in aqueous zinc metal batteries exceed 15% of capacity within hours, independent of electrolyte, current collector, or temperature, driven by the thermodynamic advantage of hydrogen evolution over zinc plating/stripping, a mechanism far more severe than in analogous lithium or sodium systems.
Linking electrocatalytic turnover to elementary step rates in hydrocarbon fuel oxidation
Using electrochemistry-mass spectrometry to resolve potential-dependent rates of each elementary step in propane oxidation on platinum, this study links electrocatalytic turnover to hydrocarbon fuel oxidation, showing low steady-state activity stems from mismatched optimal potentials for adsorption, conversion, and *CO oxidation, resolved by applying alternating potentials.
Interesting Signals from Electrochemical Mass Spectrometry: Are They Real? Probably Not. Chemical Ionization Can Distort Electron Ionization Mass Spectra
Chemical ionization occurring inadvertently in the electron-ionization chamber can scramble m/z distributions and mislead analysis of EC-MS reaction intermediates and products; this study illustrates the effect through case studies including H2 evolution, showing when interesting EIMS signals are probably measurement artifacts rather than real chemistry.
13C-Labeled Mesoporous N-Doped Carbon Nanospheres and N-Doped Hydrothermal Carbon Aerogels as Model Materials for Carbon Corrosion Determination in Electrode Structures
13C labeling of mesoporous N-doped carbon nanospheres and N-doped hydrothermal carbon aerogels enables selective detection of 13CO2 via electrochemically coupled mass spectrometry, providing an in situ method to monitor carbon corrosion in electrode structures during operation.
Hydride Formation and Decomposition on Cu(111) in HClO4
Using electrochemistry-mass spectrometry, this study resolves the hydride formation and decomposition dynamics on Cu(111) in 0.1 M HClO4, linking two reduction waves and an oxidative/reductive feature near -0.05 V RHE to potential-dependent hydrogen coverage and surface reconstruction.