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首页> 外文期刊>Topics in Catalysis >Selective Catalytic Reduction of NO_x Over Nano-Sized Gold Catalysts Supported on Alumina and Titania and Over Bimetallic Gold-Silver Catalysts Supported on Alumina
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Selective Catalytic Reduction of NO_x Over Nano-Sized Gold Catalysts Supported on Alumina and Titania and Over Bimetallic Gold-Silver Catalysts Supported on Alumina

机译：氧化铝和二氧化钛负载的纳米金催化剂和氧化铝负载的双金属金银催化剂的选择性催化还原NO_x

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The reduction of NO with octane under lean conditions was examined over gold supported on alumina and titania and over alumina supported bimetallic gold-silver catalysts. The silver loading was either 1.2 or 1.9 wt% whereas 0.3, 1 or 5 wt% gold was used. The catalysts were characterized by means of EDXS, N2-ad-sortion, UV-Vis and TEM to correlate recorded results with different preparation methods. UV-Vis measurements indicated that gold was present in the form of fine Au particles, single Au ions and small (Au)_n~(δ+) clusters on the catalysts and silver was mainly present in the form of single Ag ions. The highest NO to N2 reduction activity was recorded over the 0.3Au-Al2O3 catalyst. The Au-TiO2 catalysts did not result in significant NO to N2 reduction.
机译：在贫化条件下用辛烷还原NO的过程是在氧化铝和二氧化钛上负载的金以及氧化铝负载的双金属金银催化剂上进行的。银载量为1.2或1.9重量％，而使用0.3、1或5重量％的金。通过EDXS，N2-ad-sorting，UV-Vis和TEM对催化剂进行了表征，以将记录的结果与不同的制备方法相关联。 UV-Vis测量表明，金以细的Au颗粒，单一的Au离子和催化剂上的小（Au）_n〜（δ+）簇的形式存在，而银主要以单一的Ag离子形式存在。在0.3Au-Al2O3催化剂上记录到最高的NO-N2还原活性。 Au-TiO2催化剂没有导致明显的NO还原为N2。

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