“…Silver clusters with <10 atoms related to these peaks are larger than the diameter of clinoptilolite channels (Chmielewská et al , 2003). Thus, it is suggested that the DBD-like plasma jet application yields small Ag clusters, in agreement with previous work (Chmielewská et al , 2003; Zaarour et al , 2014; Skіba & Vorobyova, 2018; Gonçalves et al , 2019; Taaca et al , 2020). Fig.…”
Section: Resultssupporting
confidence: 89%
“…Thus, we can suppose that the DBD-like plasma jet application leads to appearance in the form of small cluster. Results indicated the generation of Ag in metallic form on the surface of Ag-clinoptilolite using Ar plasma (Chmielewská et al 2003;Zaarour et al 2014;Gonçalves et al 2019;Skіba & Vorobyova, 2018;Taaca et al 2020). Recently, there is a proposed mechanism related to plasma reduction of metal ions introduced into porous structures.…”
Section: Resultsmentioning
confidence: 99%
“…Afterwards, the Ag clusters combine with electrons to form Ag nanoparticles. Another mechanism brings about a plasma-induced dissociation of water molecules physisorbed on the zeolitic structure, which generates hydrated electrons and hydrogen radicals that easily reacts with the metal ions in the structure (Chmielewská et al 2003;Gonçalves et al 2019;Osonio & Vasquez, 2018).…”
“…Silver clusters with <10 atoms related to these peaks are larger than the diameter of clinoptilolite channels (Chmielewská et al , 2003). Thus, it is suggested that the DBD-like plasma jet application yields small Ag clusters, in agreement with previous work (Chmielewská et al , 2003; Zaarour et al , 2014; Skіba & Vorobyova, 2018; Gonçalves et al , 2019; Taaca et al , 2020). Fig.…”
Section: Resultssupporting
confidence: 89%
“…Thus, we can suppose that the DBD-like plasma jet application leads to appearance in the form of small cluster. Results indicated the generation of Ag in metallic form on the surface of Ag-clinoptilolite using Ar plasma (Chmielewská et al 2003;Zaarour et al 2014;Gonçalves et al 2019;Skіba & Vorobyova, 2018;Taaca et al 2020). Recently, there is a proposed mechanism related to plasma reduction of metal ions introduced into porous structures.…”
Section: Resultsmentioning
confidence: 99%
“…Afterwards, the Ag clusters combine with electrons to form Ag nanoparticles. Another mechanism brings about a plasma-induced dissociation of water molecules physisorbed on the zeolitic structure, which generates hydrated electrons and hydrogen radicals that easily reacts with the metal ions in the structure (Chmielewská et al 2003;Gonçalves et al 2019;Osonio & Vasquez, 2018).…”
“…Uma agulha de seringa de aço inoxidável (1.20 mm x 40.0 mm) com uma ponta cônica de raio de curvatura de 0,27 mm foi utilizado como eletrodo. Investigou-se com esse tipo de descarga (a) efeito do plasma sobre água destilada [31]; (b) degradação de alaranjado de metila por plasma corona [32] (c) efeito do plasma sobre uma superfície de água-mãe (resíduo de água hipersalina resultante da produção do sal marinho) [33][34][35]; (d) produção de nanopartículas de Ag a partir da interação do plasma com solução 2 mM de nitrato de prata [36]; As condições experimentais de (a) e (b) foram as mesmas, ou seja, utilizou-se 15 kV e 500 Hz, com polarização anódica e catódica. O efeito sobre água-mãe foi realizado num recipiente fechado, contendo Hélio, com polarização catódica (Fig.…”
“…Figure outlines the PLI, emphasizing the spatial position of the reactor termed nanoreactor because its volume has a fraction of 10 –9 L when pondering differences in the time scales for both chemical and diffusion events related to the hydrated electrons ( e aq – ). The electrosynthesis develops mostly within such nanoreactor.…”
Electrosynthesis
via electrochemical plasma, a discharge over the
surface of liquid water (or plasma cathode), may offer an unprecedented
route of synthesis for chemicals and (wind) solar fuels. Describing
the physical chemical events underneath plasma/liquid interface (PLI)
on a theoretical basis is crucial for enabling a rational designing
of chemical synthesis. To address this problem, this work proposes
a generalist dynamical model for the nanoreactor, a fraction of nanoliters
localized beneath the PLI that features substantially high concentration
of hydrated electrons (e
aq
–), and it screens
chemical reaction networks (CRN) related to the synthesis of hydrogen,
a model electrosynthesis process. The computational results elucidate
two major routes for hydrogen production: (a) in very alkaline media,
the water reduction via self-recombination of e
aq
– [2e
aq
– + 2H2O → H2 + 2OH–] consumes the majority
of e
aq
–, whereas (b) in very acid media, e
aq
– is majorly scavenger by the ion H
aq
+, generating an abnormally high concentration of the radical
H•, a precursor for gaseous hydrogen. Additionally,
two scenarios are disadvantageous for synthesizing H2.
Side reactions with aqueous oxygen and aqueous radical •OH leads to substantial production of O2
– and OH–,
respectively. Without loss of generality, the dynamical model proposed
in this work is a powerful theoretical frame for understanding and
predicting a variety of plasma-induced CRNs, assisting to advance
the emerging field of plasma electrochemistry.
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