The promotional effect of Cr on catalytic activity of Pt/ZSM-35 for H2-SCR in excess oxygen

Ojng Yu; Manfred Richter; Landong Li

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The promotional effect of Cr on catalytic activity of Pt/ZSM-35 for H2-SCR in excess oxygen

机译：Cr对Pt / ZSM-35在过量氧气中对H2-SCR催化活性的促进作用

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Selective catalytic reduction of NO by hydrogen was studied over Cr modified Pt/ZSM-35 catalysts. The preparation process greatly influenced catalytic activity and sample prepared by co-impregnation method exhibits the best activity. In situ DRIFT studies revealed that on Pt-Cr/ZSM-35, (1) new Pt-NO~(δ+) and NO species adsorbed on Pt were detected upon NO + O2 adsorption; (2) much more ammonia species were formed under reaction condition. Cr addition not only enhanced the adsorption of NO_x but also promoted the formation of surface NH4~+ species, which should be the origin of promotional effect of Cr on Pt/ZSM-35 for H2-SCR reaction.

机译：在Cr改性的Pt / ZSM-35催化剂上研究了氢选择性催化还原NO的方法。制备过程对催化活性的影响很大，共浸渍法制备的样品表现出最好的活性。原位DRIFT研究表明，在Pt-Cr / ZSM-35上，（1）NO + O2吸附检测到新的Pt-NO〜（δ+）和NO吸附在Pt上。（2）在反应条件下形成了更多的氨。 Cr的添加不仅增强了NO_x的吸附，而且促进了表面NH4〜+的形成，这可能是Cr对Pt / ZSM-35促进H2-SCR反应的促进作用的起源。

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《Catalysis Communications》 |2010年第11期|共5页
作者
Ojng Yu; Manfred Richter; Landong Li;
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正文语种 eng
中图分类物理化学（理论化学）、化学物理学;
关键词
Chromium; Pt/ZSM-35; H2-SCR; NH4~+;

机译：铬;Pt / ZSM-35;H2-SCR;NH4〜+;

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The promotional effect of Cr on catalytic activity of Pt/ZSM-35 for H2-SCR in excess oxygen

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