Electrodeposited thin mercury films on Pt–Ir alloy electrodes

Assembly of gold nanoparticles on graphene film via electroless deposition: spontaneous reduction of Au3+ ions by graphene film

“…34 It generally describes any one of the two 5 different processes: (i) direct electroless deposition, in which the metal is directly reduced by a reducing agent, or (ii) a galvanic displacement reaction where the electrons to reduce the gold ions are supplied by the dissolution of the substrate. [38][39][40][41] In the present work, direct electroless deposition method is used for the 10 deposition of AuNPs on GO and ERGO films. The HAuCl 4 is used as a precursor and NH 2 OH is used as the reducing agent.…”

The Influence of Metallic Oxides Formed by Repetitive Cyclic Voltammetry or Controlled Potential in the Reactivity of Ir/Hg System

“…Pure platinum, rhodium and iridium, and alloys of platinum-iridium and platinum-rhodium have been widely used to prepare microelectrodes [1][2][3][4][5][6], catalysts used in petroleum cracking industry [7][8]. It is well known that when solid metals are placed in contact with mercury, a variety of physicochemical changes may occur, e.g., complete or partial dissolution of the solid, intermetallic compounds formation at the liquid-solid interface or in the solution, grain boundary grooving, and liquid metal embrittlement.…”

“…It is well known that when solid metals are placed in contact with mercury, a variety of physicochemical changes may occur, e.g., complete or partial dissolution of the solid, intermetallic compounds formation at the liquid-solid interface or in the solution, grain boundary grooving, and liquid metal embrittlement. Such changes may also cause structural deterioration of the solid surface [2][3][4][5][6].…”

“…Considering the importance of the development of new substrates with high resistance to mercury amalgamation, Pt-Ir (20 wt.%) has been suggested as an appropriate substrate for mercury deposition due to its surface is not scarred by interaction with mercury [9]. However, intermetallic compounds such as PtHg 4 and PtHg 2 on the Pt-Ir (20 wt.%) alloy surface were identified based on X-ray diffraction results [4]. The resulting changes in the surface morphology were investigated by optical interferometry and SEM images, and the changes in the Hg-noble alloy interaction energy by XPS.…”

“…The resulting changes in the surface morphology were investigated by optical interferometry and SEM images, and the changes in the Hg-noble alloy interaction energy by XPS. The XPS results were interpreted considering a model where the electrode/solution interphase is composed by different phases including a three layered region structure, containing at least two Pt-Hg intermetallics, PtHg 4 and PtHg 2 , and a substrate modified region, iridium rich [4].…”