【摘要】 考察了光氧化水反应中,Na-Y型分子筛及金属氧化物组元配比对放氧活性的影响。加入空白的Na-Y型分子筛担体能提高单组元RuO₂/Y的催化活性,但导致 RuO₂/Y+MeO_x/Y及RuO₂/Y+PtO_x/Y+Me＇O_x/Y复合催化剂放氧活性降低。二元复合催化剂RuO₂/Y+FeO_x/Y的最佳组元配比为1:0.6（按纯金属μmol计）。比较了分浸和共浸两种方法制备的二元复合催化剂的催化活性,还考察了光敏剂/电子受体的配比对光氧化水反应的影响。更多还原

【Abstract】 We have previously reported the mixtures of RuO2/Y with MeOx/Y show higher catalytic activity than simple RuO2/Y in the photooxidation of water to generate dioxygen, and some ternary mixtures (RuO2/Y + PtOx/Y+MeOx/Y) show even higher catalytic activity than binary mixtures[2].In this paper, the effects of Na-Y zeolite support and the composition of metal oxides of catalysts on the catalytic activity for photooxidation of water have been investigated. The following results were obtained: ( 1 ) The addition of free Na-Y zeolite could enhance the catalytic activity of simple RuO2/Y, but lower the activities of binary mixtures RuO2/Y + MeOx/Y (Me=Pd, Pt, Ir,Fe) and ternary mixtures RuO2/Y + PtOx/Y + MeOx/Y(Me=Ir,Fe). (2) The optimum ratio of RuO2/FeOx of RuO2/Y + FeOx/Y catalyst was 1:0.6 (as pure metal, μmol). (3) The activities of various RuO2/Y+ MeOx/Y were generally higher than that of corresponding co-impregnated (RuO2-MeOx)/Y; it was of interest to note that in contrast to RuO2/Y+FeOx/Y, (RuO2-FeOx)/Y with various Ru:Fe ratio (1:0.02-1:2.06) all showed only negligible catalytic activity.The influence of PS: A (Ru(bpy)32+: Co(NH3)5Cl2+) on the photogenera-tion of dioxygen has also been examined.更多还原