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- W2025956472 abstract "Abstract Steam reforming of methanol (SRM) was carried out at 250 °C over CuO/CeO 2 and CuO/ZrO 2 catalysts with various CuO contents and water/MeOH ratios in a flow reaction system. The 80 wt.% CuO/ZrO 2 gave the highest activity, and the optimum water/MeOH ratio was 1.5. The oxidation states of Cu species in post-reaction catalyst depended upon CuO contents and the water/MeOH ratio. The starting copper compounds were CuO in all cases, and the copper in almost all catalysts was reduced to metallic Cu. Cu 2 O appeared in 80 and 90 wt.% CuO/ZrO 2 when water/MeOH ratios were above 1 irrespective of reducing atmospheres. The reduction behavior of the 80 wt.% CuO/ZrO 2 catalyst with hydrogen was investigated by XANES technique in an in situ cell. In the narrow temperature range of 180–200 °C, CuO was reduced to metallic Cu via the intermediate Cu 2 O. The Fourier transform magnitude of K-edge Zr of 80 wt.% CuO/ZrO 2 showed that the configuration of zirconium in the catalysts was very similar to that of monoclinic zirconia. The Debye rings of 80 wt.% CuO/ZrO 2 and 80 wt.% CuO/CeO 2 catalysts showed that zirconia was less coagulated at 300 °C than CeO 2 ; heat resistance of ZrO 2 is higher than that of CeO 2 . BET surface area of 80 wt.% CuO/ZrO 2 was 85.3 m 2 /g, and that of 80 wt.% CuO/CeO 2 was 46.0 m 2 /g, suggesting that ZrO 2 in the catalyst has micro crystallites and is highly dispersed." @default.
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- W2025956472 date "2005-09-01" @default.
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- W2025956472 title "Cu2O as active species in the steam reforming of methanol by CuO/ZrO2 catalysts" @default.
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- W2025956472 doi "https://doi.org/10.1016/j.apcata.2005.07.010" @default.
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