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Effect of metal loading and carbon support microstructure on the dispersion of Pt/C catalysts prepared viaadsorption of chloroplatinic acid

“…It is well documented that filling the support pores with the solution is accompanied by an intensive adsorption of H 2 PtCl 6 , which proceeds mainly through a reduction of H 2 PtCl 6 to Pt II and Pt 0 compounds [2][3][4][5][6][7][8][9][10][11][12]. The adsorption capacity of carbons in respect to H 2 PtCl 6 increases linearly with an increase in _________________________ *Corresponding author.…”

“…It is believed that they react with other oxidants, e.g., aqueous H 2 PtCl 6 , in the same manner [2,4,7,10,12]. Many authors assume that some oxygen-containing groups emerged during the carbon surface oxidation are prone to binding Pt II and Pt IV chloride complexes [2,5,[7][8][9][14][15][16].…”

Effects of carbon surface oxides on the dispersion of Pt/C catalysts prepared via adsorption of hexachloroplatinic acid: a new insight

“…Since the main precursors of the Pt/C catalysts are Pt 0 and/or Pt II species adsorbed during the reduction of H 2 PtCl 6 by carbon surface at the impregnation step of the catalyst synthesis [1, [8][9][10][11][16][17][18][19][20], we put forward an idea that the metal dispersion in Pt/C could correlate with the ratio between the amounts of the adsorbed precursors [15]. In the common case, the final state of a redox system, in particular, the ratio between the equilibrium concentrations of all redox components, depends on many parameters, one of which is the ratio between quantities (in gram-equivalents) of oxidants and reductants taken initially.…”

Influence of solubility parameter difference between monomer and porogen on structures of poly (acrylonitrile–styrene‐divinylbenzene) resins

“…The common monomers used for preparation of macroporous resin include styrene, (meth)acrylic acid ester, 4‐methylstyrene, polyacrylonitrile, acrylamide all with an added crosslinking agent . Acrylonitrile‐based chelating resin have reactive pendant cyano groups, which can be modified by different kinds of reagent through nucleophilic addition and cycloaddition reactions . Among them, the amidoxime reaction is the use of a nucleophilic addition reaction of a cyano group and a hydroxylamine reagent to obtain a compound having an amidoxime group.…”