Mouse FTO blocking peptide

A series of Ag2-xO/FTO-i electrodes (where i denotes the current density during the electrodeposition, and i = 0.5, 1, 2, 3, 4, or 7) was fabricated in 0.1 M K2B4O7 electrolyte containing Ag+ ions by galvanostatic electrocrystallization. The electrode composition and morphology were characterized using X-ray powder diffraction, scanning electron microscopy, and X-ray photoelectron spectroscopy. The results reveal that the electrode films consist of Ag2O, but some of the Ag+ ions on the {111} crystal facets are oxidized into Ag2+ ions. Furthermore, the Ag2-xO/FTO-1 electrode shows a triangular slice shape of a parallel matrix with a larger exposed area of {111} crystal facets than other Ag2-xO/FTO-i (i = 0.5, 2, 3, 4, or 7) electrodes. Electrocatalytic experiments prove that the Ag2-xO/FTO-1 electrode produces the highest oxidative current density, has an overpotential of 417 mV at 10 mA cm(-2), and has a Tafel slope of 47 mV dec(-1) in 0.1 M K2B4O7. Electrochemical impedance spectra indicate that Ag2-xO/FTO-1 electrodes have the best ability for charge transfer. In addition, in the I-t test over 10 h, the current density decreased 4%. Fortunately, both O-O and Ag2+ species were detected after electrocatalysis and a possible mechanism for the oxygen evolution reaction is proposed in which the formation of Ag2+ and O-O species on {111} facets plays a critical role. (c) 2020, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.

A strategy to overcome the unsatisfying catalytic performance and the durability of monometallic iron-based materials for the electrochemical oxygen evolution reaction (OER) is provided by heterobimetallic iron-metal systems. Monometallic Fe catalysts show limited performance mostly due to poor conductivity and stability. Here, by taking advantage of the structurally ordered and highly conducting FeSn(2)nanostructure, for the first time, an intermetallic iron material is employed as an efficient anode for the alkaline OER, overall water-splitting, and also for selective oxygenation of organic substrates. The electrophoretically deposited FeSn(2)on nickel foam (NF) and fluorine-doped tin oxide (FTO) electrodes displays remarkable OER activity and durability with substantially low overpotentials of 197 and 273 mV at 10 mA cm(-2), respectively, which outperform most of the benchmarking NiFe-based catalysts. The resulting superior activity is attributed to the in situ generation of alpha-FeO(OH)@FeSn(2)where alpha-FeO(OH) acts as the active site while FeSn(2)remains the conductive core. When the FeSn(2)anode is coupled with a Pt cathode for overall alkaline water-splitting, a reduced cell potential (1.53 V) is attained outperforming that of noble metal-based catalysts. FeSn(2)is further applied as an anode to produce value-added products through selective oxygenation reactions of organic substrates.