Competition between Hydrogen Evolution and Carbon Dioxide Reduction on Copper Electrodes in Mildly Acidic Media

Catalysis and Surface Chemistr

Mechanistic study of the electrosynthesis of propylene carbonate from propylene oxide and CO2 on copper electrodes

Catalysis and Surface Chemistr

Spectro-Electrochemical Examination of the Formation of Dimethyl Carbonate from CO and Methanol at Different Electrode Materials

Catalysis and Surface Chemistr

Electrocatalytic reduction of Nitrate on Copper single crystals in acidic and alkaline solutions

Catalysis and Surface Chemistr

Interconversions of nitrogen-containing species on Pt(100) and Pt(111) electrodes in acidic solutions containing nitrate

This work deals with the interconversions of various nitrogen-containing compounds on Pt(111) and Pt(100) electrodes in contact with acidic solutions of nitrate. Via its reduction, nitrate acts merely as the source of adsorbed nitrogen-containing intermediates, which then undergo complex oxidative or reductive transformations depending on the electrode potential. Nitrate reduction to ammonium is structure sensitive on Pt(111) and Pt(100) because it is mediated by *NO, the adsorption and reactivity of which is also structure sensitive. Accordingly, previous knowledge from *NO electrochemistry is useful to streamline nitrate reduction and elaborate a comprehensive picture of nitrogen-cycle electrocatalysis. Our overall conclusion for nitrate reduction is that the complete conversion to ammonium under prolonged electrolysis is possible only if the reduction of nitrate to nitric oxide, and the reduction of nitric oxide to ammonium are feasible at the applied potential. Among the two surfaces studied here, this condition is fulfilled by Pt(111) in a narrow potential region. (C) 2018 Elsevier Ltd. All rights reserved.Catalysis and Surface Chemistr

Electrochemical CO2 reduction on gas diffusion electrodes: enhanced selectivity of In–Bi bimetallic particles and catalyst layer optimization through a design of experiment approach

CO2 electroreduction to formate powered by renewable energy is an attractive strategy to recycle carbon.Electrode materials showing high selectivity for formate at high current densities are post-transition metals such as Sn, In, Pb, Hg, and Bi. Scaling up the CO2 electroreduction technology to industrial size will require, among other things, maximization of selectivity at high current densities. We show here that InBielectrocatalysts provide enhanced selectivity compared to pure In and Bi and that a proper formulation of the catalyst layer can have a profound impact on the performance of gas diffusion electrode electrolyzers. The best performing electrodes screened in this study show nearly 100% current efficiency at current densities up to 400 mA cm−2 for 2 h. Additionally, one electrode was shown to operate at a current density of 200 mA cm−2 for 48 h at a current efficiency of 85% and remained operating with a current efficiency above 50% for 124 h.Catalysis and Surface Chemistr

Cross-sectional Survey of Hantavirus Infection, Brazil

A cross-sectional serosurvey was conducted to assess the proportion of persons exposed to hantaviruses in a virus-endemic area of the state of Minas Gerais, Brazil. Findings of this study suggested the presence of >1 hantaviruses circulating in this region causing hantavirus pulmonary syndrome, mild disease, or asymptomatic infection