Ultra-low loading Pt Rh/Sn0.9In0.1P2O7 three-way catalyst for propane + NO + O2 reaction
Ultra-low loading Pt Rh/Sn0.9In0.1P2O7 three-way catalyst for propane + NO + O2 reaction
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DOI：
10.1016/j.apcatb.2011.06.009
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发表时间：
2011-08-11
影响因子：
22.1
通讯作者：
Hibino, Takashi
中科院分区：
文献类型：
--
作者：
Dong, Xue;Tsuneyama, Kota;Hibino, Takashi
采用电化学池和浸渍催化剂研究了丙烷在质子导体-电催化剂界面的氧化和NO还原。Sn_（0.9）In_（0.1）P_2 O_7和Pt或Pt-Rh分别用作质子导体和电催化剂。在丙烷、H2O和NO的气体混合物中，H2O在界面处的阳极位点处解离成质子和电子，并且所得的活性氧将丙烷氧化成CO2。分开NO与质子和电子在界面处的阴极位点反应形成N2 O。在包括1000 ppm丙烷、1000 ppm NO、3%H2O和4500 ppm O-2的化学计量条件下，对于丙烷和NO，上述一系列反应可以成功实现50%转化率（T-50%）的温度分别降低到310和385 ℃，超过0.01重量%的H2O。Pt/Sn0.9In0.1P2O7催化剂。这些分别比丙烷和NO的430和535摄氏度的T-50%低得多，超过0.01重量%。Pt/-γ-Al 2 O3催化剂。此外，添加0.005重量%的Pt/Sn0.9In0.1P2O7催化剂上的Rh通过促进NO的解离吸附而增强了NO还原，从而为NO反应提供了T-50%的进一步还原至355 ℃。2011 Elsevier By. All rights reserved.
Propane oxidation and NO reduction at the proton conductor-electrocatalyst interface were investigated using electrochemical cells and impregnated catalysts. Sn0.9In0.1P2O7 and Pt or Pt-Rh were used as the proton conductor and electrocatalyst, respectively. In a gaseous mixture of propane, H2O, and NO. H2O is dissociated into protons and electrons at anodic sites at the interface and the resultant active oxygen oxidizes propane to CO2. Separately. NO reacts with protons and electrons to form N2O at cathodic sites at the interface. Under stoichiometric conditions, including 1000 ppm propane, 1000 ppm NO, 3% H2O, and 4500 ppm O-2, the temperatures at which the above series of reactions could successfully achieve 50% conversion (T-50%) was reduced to 310 and 385 degrees C for propane and NO, respectively, over a 0.01 wt.% Pt/Sn0.9In0.1P2O7 catalyst. These were much lower than T-50% of 430 and 535 degrees C for propane and NO, respectively, over a 0.01 wt.% Pt/-gamma-Al2O3 catalyst. Moreover, the addition of 0.005 wt.% Rh to the Pt/Sn0.9In0.1P2O7 catalyst enhanced NO reduction by promoting the dissociative adsorption of NO, thus providing a further reduction of T-50% for the NO reaction to 355 degrees C. 2011 Elsevier By. All rights reserved.