Products of binary complex compounds thermolysis: Catalysts for hydrogen peroxide decomposition

Proportioning and characterization of Portland cement-based ultra-lightweight foam concretes

“…The reaction rate of hydrogen peroxide and OH À largely depends on the reaction temperature [17,18], therefore oxygen release rate or foaming process is very sensitive to temperature. Fig.…”

Solid-State Transformations in Inner Coordination Sphere of [Co(NH3)6][Fe(C2O4)3]∙3H2O as a Route to Access Catalytically Active Co-Fe Materials

“…Previously, we received very high activity values in a reaction of decomposition of H 2 O 2 (a rate constant to 10 −2 L s −1 g −1 [4]). Such systems were obtained as products of DCS thermal decomposition and contain above 10 wt % of residual carbon, and have a specific surface area of about 100 m 2 g −1 [4,5,6,7]. Low specific surfaces areas and the absence of residual carbon can be correlated with a low catalytic activity.…”

“…Low specific surfaces areas and the absence of residual carbon can be correlated with a low catalytic activity. Further, the effect of residual carbon on the catalytic activity of thermolysis products should be investigated in more detail, considering the local structure of metal-carbon intermediates obtained by the thermal decomposition of carbon, containing double complex salts such as [Co(en) 3 ][Fe(CN) 6 ], [Ni(NH 3 ) 6 ] 3 [Fe(CN) 6 ] 2 and its analogues [4,5,6,7].…”

“…The reactions mentioned above were used to test the catalytic properties of the products. The 1-decomposition of hydrogen peroxide occurred in an aqueous solution in the presence of a solid sample [4]. The first order rate constant has been determined using the residual concentration of H 2 O 2 .…”

“…Double complex salts (DCS), containing coordination cation and coordination anion, have been proposed as promising, single-source precursors for polymetallic and oxide materials, with promising catalytic activity [3]. Previously we investigated double complex salts with a general formula [ M 1 ( A ) 6 ][ M 2 X 6 ], where M 1 , M 2 = Fe, Co, Ni, Cu; A = NH 3 , en/2, tn/2, ur (En—diaminoethane; Tn—1,3-diaminopropane; Ur—urea), X = CN − , C 2 O 4 2− /2, as precursors of bimetallic catalysts [4,5,6,7]. Their thermal decomposition products were tested as catalysts for H 2 O 2 decomposition [4], gas-phase oxidation of ethanol and acetone [5,6], as well as in the solid-state decomposition of NH 4 ClO 4 [7].…”