Mechanistic insight in the propylene derived distinct NO uptake and release behaviors on Pd/SSZ-13 for low-temperature NO adsorption
Mechanistic insight in the propylene derived distinct NO uptake and release behaviors on Pd/SSZ-13 for low-temperature NO adsorption
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DOI：
10.1016/j.cej.2022.139507
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发表时间：
2022-10
影响因子：
15.1
通讯作者：
Huawang Zhao;Xiaoyin Chen;Alexander J. Hill;Guohua Jing;Yongdan Li;J. Schwank
中科院分区：
文献类型：
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作者：
Huawang Zhao;Xiaoyin Chen;Alexander J. Hill;Guohua Jing;Yongdan Li;J. Schwank
Pd/SSZ-13 catalysts were investigated for the simultaneous storage of NO and C3H6at 100 °C. The effects of the state of Pd species on co-adsorption and release were studied under simulated exhaust conditions. The catalysts were characterized by NH3-TPD, XRD, and TEM for Pd2+and PdO species. NO adsorption/release behavior is impacted by the nature of reactants and the NO storage capacity at 100 °C was enhanced by simultaneous NO + C3H6adsorption. DRIFTs results showed that Pd2+provides the adsorption sites for NO + C3H6to form Pd2+(NO)(C3H6), which alleviates the inhibition effect of H2O on NO adsorption on Pd ions. Different release behaviors, which are discussed in light of the chemistry of NO and C3H6adsorption and effect of intermediate CO, depend on whether NO was adsorbed alone or together with C3H6. The mechanistic pathways during different stages of NO + C3H6co-adoption and release are proposed.
