Metal phosphate-supported RuOx catalysts for N2O decomposition
Metal phosphate-supported RuOx catalysts for N2O decomposition
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用于 N2O 分解的金属磷酸盐负载 RuOx 催化剂
DOI：
10.1016/j.jtice.2016.07.025
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发表时间：
2016-10
影响因子：
5.7
通讯作者：
Ma Z.
中科院分区：
文献类型：
--
作者：
Cui Y.W.;Liu H.;Lin Y.;Ma Z.
用RuCl3浸渍工业金属磷酸盐，在500℃空气中焙烧制备了RuOx/M-P-O(M=0.1Mg，Al，Ca，Fe，Co，Zn，La)催化剂，考察了该催化剂对N2O分解的催化性能。在这些催化剂中，RuOx/Ca-P-O(又称RuOx/HAP，HAP=羟基磷灰石)活性最高，在400℃时实现了N2O的完全转化，RuOx/Mg-P-O活性次之，400℃时N2O转化率为46.3%。考察了氢气预处理和不同的含Ru前驱体对RuOx/HAP催化性能的影响。表征数据表明，RuOx/HAP具有不那么小的比表面积(49.5×m2/g)，高度分散的无定形RuOx物种，以及相对丰富的碱性中心、O2-吸附中心和表面羟基。
RuOx/M–P–O (M = Mg, Al, Ca, Fe, Co, Zn, La) catalysts were prepared by impregnating commercial metal phosphates with RuCl3, followed by calcination in air at 500 °C. The catalytic performance in N2O decomposition was studied. Among these catalysts, RuOx/Ca–P–O (also denoted as RuOx/HAP, HAP = hydroxyapatite) showed the highest activity, achieving complete N2O conversion at 400 °C. RuOx/Mg–P–O was the second most active, showing 46.3% N2O conversion at 400 °C. The presence of 5.0 vol.% O2or 2.0 vol.% H2O in the reaction mixture inhibited the catalytic activity of RuOx/HAP to some extent, but the inhibiting effect was reversible,i.e., the activity was restored after O2or H2O was retracted. The influences of pretreatment by H2as well as different Ru-containing precursors on the catalytic performance of RuOx/HAP were also studied. The characterization data indicate that RuOx/HAP has a not-so-small surface area (49.5 m2/g), highly dispersed amorphous RuOxspecies, as well as relatively abundant basic sites, O2-adsorption sites, and surface hydroxyls.
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