The reduction reaction of dissolved oxygen in water by hydrazine over platinum catalyst supported on activated carbon fiber

Use of Glucose Oxidase Immobilized on Magnetic Chitosan Nanoparticles in Probiotic Drinking Yogurt

“…The peak around the 500 cm −1 can be related to vibrations of Fe-O that confirms the presence of magnetic nanoparticles. This result is in line with the finding of Moon et al (1999) . The peaks at 1,060 cm −1 , and 1,070 cm −1 are related to C-O-C stretching vibrations of chitosan.…”

Mechanism and kinetics of hematite reduction under typical PWR secondary circuit condition

“…Decomposition is less significant than oxidation, but it increases significantly with hydrazine concentration. This is in agreement with the decomposition kinetics of hydrazine which is first order with regard to hydrazine concentration [23], and with the oxidation kinetics of hydrazine by oxygen which is thought to be ½ order with regard to hydrazine concentration [23] or ¼ order with regard to hydrazine when Pt is present (which is the case here with the use of a redox electrode containing Pt) [28]. Therefore, with increasing hydrazine concentration, decomposition rate increases faster than oxidation rate.…”

Palladium supported on filamentous active carbon as effective catalyst for liquid-phase hydrogenation of 2-butyne-1,4-diol to 2-butene-1,4-diol

“…Metallic palladium is known to selectively reduce triple bonds (Tedeschi & Clark, 1962) and Pd=C catalysts are known to hydrogenate 2-butyne-1,4-diol to 2-butene-1,4-diol with selectivity up to ¿ 99% (Chaudhari, Gholap, Emig, & Hofmann 1987a;Chaudhari, Jaganathan, Kohle, Emig, & Hofmann, 1987b;Winterbottom et al, 1997). The use of activated carbon in the form of ÿlamentous woven materials as catalytic supports have been already reported in the scientiÿc literature (Jin, Park, Lee, & Ryu, 1996;Mochida et al, 1997;Mochida et al, 1997a,b;Perez et al, 1997;Yoshikawa, Yasutake, & Mochida, 1998;Moon, Park, Kim, & Seo, 1999;Ryu, Kim, Li, & Jaroniec, 1999;Mochida et al, 2000). These supports have advantageous characteristics as compared to traditional activated carbons, like: (a) high speciÿc surface area (SSA) of 600 -3000 m 2 =g; (b) morphological network formed by short micro-pores with narrow size distribution, ensuring fast adsorption=desorption; (c) easy reuse due to simple handling (could be bent and rolled); (d) low resistance to the passage of uid; (e) high uid permeability.…”

“…ACF materials have been proven to have a great potential as catalytic supports, especially for expensive noble metals, since a high metal dispersion can be achieved via impregnation. Pd and Pt supported on ACF were highly active in catalysing liquid-phase hydrogenations of nitrobenzene to aniline (Perez et al, 1997), C 6 oleÿns to corresponding saturated hydrocarbons (Okhlopkova, Lisitsyn, Likholobov, Gurrath, & Boehm, 2000), and in the reduction of the oxygen dissolved in water (Moon et al, 1999).…”