The direct synthesis of hydrogen peroxide (DSHP) from
H2 and O2 is conceptually the most ideal and
straightforward
reaction for producing H2O2 in industry. However,
precisely tailored catalysts are still in progress for large scale
production. Here, we report highly efficient and industrially relevant
catalysts for the direct synthesis of H2O2 from
H2 and O2 prepared by the immobilization of
Pd nanocatalysts onto a functionalized resin. The continuous production
of 8.9 wt % H2O2 and high productivity (180
g of H2O2 (g of Pd)−1 h–1) is achieved under intrinsically safe and less-corrosive
conditions without any loss of activity. We expect this approach is
a substantial improvement of nanocatalysts for direct synthesis of
hydrogen peroxide from hydrogen and oxygen and will greatly accelerate
the industrially relevant process of on site production of hydrogen
peroxide soon.
ZnMe III FeO 4 catalysts with different trivalent metal (Me III = Fe, Al, Cr, Mn, and Co) were prepared by a co-precipitation method, and were applied to the oxidative dehydrogenation of n-butene to 1,3-butadiene. Successful formation of ZnMe III FeO 4 catalysts was confirmed by XRD and ICP-AES analyses. Catalytic performance of ZnMe III FeO 4 catalysts in the oxidative dehydrogenation of n-butene strongly depended on the identity of trivalent metal (Me III ). Acid properties of ZnMe III FeO 4 catalysts were measured by NH 3 -TPD experiments, with an aim of correlating the catalytic performance with the surface acid property of the catalysts. It was revealed that yield for 1,3-butadiene increased with increasing surface weak-acid density of ZnMe III FeO 4 catalyst. Among the catalysts tested, ZnFeFeO 4 catalyst with the largest surface weak-acid density showed the best catalytic performance in the oxidative dehydrogenation of n-butene.
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