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- W2045304311 abstract "Abstract The effect of chloride ions on a monoclinic ZrO 2 -supported RuO x (RuO x /m-ZrO 2 ) catalyst with a Ru surface density of 0.3 Ru/nm 2 was studied in the selective oxidation of methanol to methyl formate (MF) at a low temperature of 373 K. The m-ZrO 2 support was Cl-free, and Cl − ions were introduced into the RuO x /m-ZrO 2 catalyst by impregnation with zirconium oxychloride or ammonium chloride and subsequent thermal treatment in air at 673 K. The structures of these catalysts were characterized by X-ray diffraction, Raman and X-ray photoelectron spectroscopies. Their reducibility was probed by temperature-programmed reduction in H 2 . The RuO x domains were present as highly dispersed RuO 2− 4 structure on m-ZrO 2 with similar reducibility for the RuO x /m-ZrO 2 samples irrespective of modification with or without Cl − ions. Introduction of appropriate amounts of zirconium oxychloride into RuO x /m-ZrO 2 led to a remarkable increase in the methanol oxidation rate and MF selectivity, whereas introduction of ammonium chloride or zirconyl nitrate significantly inhibited the catalytic performance of RuO x /m-ZrO 2 . The promoting effect of Cl − ions derived from zirconium oxychloride can be tentatively attributed to their roles in facilitating the adsorption of methanol and desorption of MF product or its intermediates. This finding provides novel insights into the promoting effect of Cl − ions on oxides-based catalysts for selective oxidation reactions." @default.
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- W2045304311 date "2013-05-01" @default.
- W2045304311 modified "2023-09-26" @default.
- W2045304311 title "Promoting effect of chloride ions on selective oxidation of methanol to methyl formate over zirconia-supported ruthenium oxide catalysts" @default.
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- W2045304311 doi "https://doi.org/10.1016/s2095-4956(13)60067-4" @default.
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