Nicolas Sergent

TL;DR: In this paper, the degradation of carbon-supported electrocatalysts has been investigated in alkaline medium by combining electrochemical measurements and identical location transmission electron microscopy; electrochemical surface area (ECSA) losses were bridged to electrocatalyst morphological changes, and the results demonstrate that the degradation in 0.1 M NaOH at 25 °C is severe (60% of ECSA loss after only 150 cycles between 0.23 V vs RHE), which is about 3 times worse than in acidic media for this soft accelerated stress test.

TL;DR: In this article, two different methods, nitric acid attack on metallic tin and neutralisation of SnCl4 solution by hydrazine, were used to extract cassiterite-type samples and their evolution as a function of the temperature of calcination in flowing oxygen up to 600°C has been studied.

TL;DR: In this article, metal oxide sols are injected at 160 °C into a solution of tetradecene and dodecylamine, and kept under heating for different periods of time.

TL;DR: In this paper, the ZrxCe1-x(OH)4 solids were prepared by simple precipitation of hydroxides from known solutions of ZrOCl2·8H2O and Ce(NO3)3·6H 2O in aqueous ammonium hydroxide.

TL;DR: In this paper, the Raman spectra of eight polycrystalline apatites of the general formula La10−xSi6−yM′yO26 ± δ with M′ = Al or Fe were obtained at 300 K.