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Formic acid (FA: HCOOH) has attracted attention as a liquid fuel for use in hydrogen fuel cells because it has high energy density and it can be handled safely. For hydrogen production from FA decompo...sition at low temperature, Au@Pd core–shell nanocatalysts supported on TiO_2 nanoparticles were prepared using microwave (MW) heating. The hydrogen production rates, 0.13, 0.21, and 3.2 L g-1 h-1, were obtained using Au@Pd/TiO_2 at 30, 60, and 90 oC, respectively. These values were larger than those obtained for bare Au@Pd catalysts by factors of 3.0, 1,8, and 1.5, respectively. Based on negative chemical shifts of Pd peaks found in XPS data of Au@Pd/TiO_2 particles in comparison with those of bare Au@Pd ones, the enhancement of catalytic activity of Au@Pd particles in the presence of TiO_2 was explained by an electron-donating effect of TiO_2 to Pd shells. This effect enhances the adsorption of formate to catalyst and dehydrogenation from formate leading to H_2 + CO_2.show more
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