Electrochemical aspects of coinage metal nanoparticles for catalysis and spectroscopy

Abstract

For noble metal, Mn+/M(atom) = reduction potential (V) values are negative.

Simultaneous electro-generation/polymerization of Cu nanocluster embedded conductive poly(2,2′:5′,2′′-terthiophene) films at micro and macro liquid/liquid interfaces

“…Meanwhile, metal nanoparticles (NPs) form the basis of numerous analytical and electrocatalytic platforms 7 – 9 ; particularly copper (Cu) based NPs which are effective in catalyzing CO 2 reduction 10 – 13 . Many metal NP preparation methods have emerged; however, the Brust-Schiffrin method, first described in 1994 14 , 15 , reproducibly generated low dispersity Au NPs by exploiting the interface between two immiscible electrolyte solutions (ITIES), i.e., the liquid|liquid interface.…”

Synthesis and Characterization of Magnetoplasmonic Air-Stable Au@FeCo

“…For example, surfactants with higher zeta potentials would lower the average size of the nanoparticles formed, and vice versa, as well as different metals would cause different speeds of particle formation through modulating the nucleation rate. , The addition of the fatty acid surfactants mechanistically causes stabilization of the Fe/Co/FeCo monomers, thus increasing the concentration necessary for supersaturation of the solvent and allowing more monomers to grow uniformly before nucleation and growth begin through a LaMer burst nucleation model. ,, Additional groups have also demonstrated an ability to control the morphology of the resultant nanoparticle through a variety of surfactants, most notably nanocubes, , demonstrating the crucial ability of the surfactant to control both shape direction and the supersaturation concentration. Thus, if a metal with a higher standard reduction potential was added, one would expect that the metal reaches a point of supersaturation first, and subsequently catalyzes the formation of more reduced metal of the various types to its surface. ,− This is the case for Au + /Au (+1.69 V vs SHE), which has a greatly positive standard reduction potential and implies a faster and more favorable reduction to Au 0 monomers, as the Au + is preferably reduced and the product is then pulled from equilibrium toward the formation of stable clusters and particles. This further implies that if Au 0 is allowed to stay in solution far before FeCo particles have an opportunity to begin forming, the Au may possibly all form one monometallic particle and fall out of solution.…”

Antiviral effects of coinage metal-based nanomaterials to combat COVID-19 and its variants

“…30,180 Besides, promising applications of coinage metals have already been extended to healthcare, medicine, electronics, and energy research. [181][182][183][184] Specifically in healthcare and medicine, coinage metals have exhibited potential to fight against the current COVID-19 pandemic and its variants due to their ability to entrap and eradicate viruses by combining with viral spike proteins, blocking attachment sites, penetration into the viral envelope, and destruction of the viral genome by electrochemical processes as well as ROS generation. 18 Although the potential of coinage metals is quite encouraging, there are some challenges related to using these metals and their compounds as uncontrolled and excessive use of coinage metals can lead to adverse effects on the human body.…”