This article presents a mechanistic study on the galvanic replacement reaction between 11- and 14-nm multiply twinned particles (MTPs) of Ag and HAuCl4 in chloroform. We monitored both morphological and spectral changes as the molar ratio of HAuCl4 to Ag was increased. The details of reaction were different from previous observations on single-crystal Ag nanocubes and cuboctahedrons. Because Au...

Noble metal nanostructures are of great interest because of their potential applications including biomedical imaging, surface-enhanced Raman scattering (SERS), and catalysis. Gold and silver nanostructures, in particular, have been most extensively studied because their localized surface plasmon resonance (LSPR) peaks are positioned in the visible and near-infrared regions, an attribute that a...

The artificial hip joints have galvanic couple between femoral head made of CoCr alloy and stem Ti or alloy, are subjected to high levels mechanical stress. Therefore, tribocorrosion has been frequently reported. In this study, we performed the first electrochemical numerical simulation for with friction in simulated body fluid. We constructed single metal model investigate effect cathodic reac...

Reduction of ZrO 2 by lithium during electrolysis LiCl-KCl-Li O melt at 650 °C was studied using a set physicochemical methods analysis. Influence in the space near molybdenum cathode on kinetics process established. Possible variations electrode reaction associated with zirconium reduction were proposed. The appearance resulted consumption reduced and increase potential relaxation time after p...

Sluggish kinetics of anodic hydrogen oxidation reaction (HOR) in alkaline media, which arises from the two orders magnitude lower HOR activity alkali than that acid media for platinum group metals, hinders commercial implementation anion exchange membrane fuel cells (AEMFCs). Consequently, development platinum-based catalysts combined with high efficiency and durability is urgently required. He...

We report an active zinc-copper (Zn-Cu) bimetallic electrocatalyst for CO 2 reduction to CO, prepared by a facile galvanic procedure. Under moderate overpotentials, Zn-Cu catalysts that are Zn rich exhibit intrinsic activity formation superior of pure Zn, Cu, and Ag, the last which is state-of-the-art catalyst in electrolyzers. Combinatorial experiments involving physical vapor deposition revea...

The dc response of an electrochemical thin film, such as the separator in a microbattery, is analyzed by solving the Poisson-Nernst-Planck equations, subject to boundary conditions appropriate for an electrolytic/galvanic cell. The model system consists of a binary electrolyte between parallel-plate electrodes, each possessing a compact Stern layer, which mediates Faradaic reactions with nonlin...