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Efficient Catalysts of La2O3 Nanorod-Supported Pt Nanoparticles for Soot Oxidation: The Role of La2O3-{110} Facets
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2019-04-17 , DOI: 10.1021/acs.iecr.9b01018 Qiangqiang Wu 1 , Jing Xiong 1 , Xuelei Mei 1 , Yilin Zhang 1 , Yuechang Wei 1 , Zhen Zhao 1 , Jian Liu 1 , Jianmei Li 1
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2019-04-17 , DOI: 10.1021/acs.iecr.9b01018 Qiangqiang Wu 1 , Jing Xiong 1 , Xuelei Mei 1 , Yilin Zhang 1 , Yuechang Wei 1 , Zhen Zhao 1 , Jian Liu 1 , Jianmei Li 1
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La2O3 nanorods (La2O3-R) with exposed {110} crystal facets were synthesized. The hemispherical platinum nanoparticles (Pt NPs) are uniformly deposited on the {110} surfaces of La2O3-R (Pt/La2O3-R) prepared by the method of gas bubbling assisted membrane reduction. Supported Pt NPs are beneficial for improving the redox ability of La2O3-R. Pt/La2O3-R catalyst exhibits higher activity (T50 = 369 °C, TOF = 1.79 S1– × 10–3) for soot oxidation compared with particle-type La2O3-supported Pt NP catalyst (Pt/La2O3-P) under conditions of soot–catalyst loose contact. The activity of Pt/La2O3-R catalyst strongly depends on the rod morphology of La2O3-R and the strong Pt–La2O3 interaction. The chemisorbed active oxygen species originating from the interaction interface of Pt NPs and {110} crystal facets of La2O3-R are responsible for improving the catalytic activity of the Pt/La2O3-R catalyst. The Pt/La2O3-R catalyst also shows high stability of activity and nanostructure during soot oxidation.
中文翻译：
La 2 O 3纳米棒负载的Pt纳米颗粒的烟灰氧化高效催化剂：La 2 O 3- {110}面的作用
合成具有{110}晶面暴露的La 2 O 3纳米棒（La 2 O 3 -R）。将半球形铂纳米粒子（Pt NPs）均匀沉积在通过鼓泡辅助膜还原法制备的La 2 O 3 -R（Pt / La 2 O 3 -R）的{110}表面上。负载的Pt NP有利于提高La 2 O 3 -R的氧化还原能力。Pt / La 2 O 3 -R催化剂具有更高的活性（T 50 = 369°C，TOF = 1.79 S 1 ××10 –3）与颗粒状La 2 O 3负载的Pt NP催化剂（Pt / La 2 O 3 -P）在烟灰-催化剂松散接触的条件下进行了比较。的Pt / La中的活性2 ö 3 -R催化剂强烈地依赖于拉的杆形态2 ö 3 -R和强的Pt-的La 2 ö 3相互作用。来自Pt NPs与La 2 O 3 -R的{110}晶面的相互作用界面的化学吸附的活性氧物种负责改善Pt / La 2 O 3 -R催化剂的催化活性。Pt / La在烟灰氧化过程中，2 O 3 -R催化剂还显示出较高的活性稳定性和纳米结构。
更新日期：2019-04-17
中文翻译：
La 2 O 3纳米棒负载的Pt纳米颗粒的烟灰氧化高效催化剂：La 2 O 3- {110}面的作用
合成具有{110}晶面暴露的La 2 O 3纳米棒（La 2 O 3 -R）。将半球形铂纳米粒子（Pt NPs）均匀沉积在通过鼓泡辅助膜还原法制备的La 2 O 3 -R（Pt / La 2 O 3 -R）的{110}表面上。负载的Pt NP有利于提高La 2 O 3 -R的氧化还原能力。Pt / La 2 O 3 -R催化剂具有更高的活性（T 50 = 369°C，TOF = 1.79 S 1 ××10 –3）与颗粒状La 2 O 3负载的Pt NP催化剂（Pt / La 2 O 3 -P）在烟灰-催化剂松散接触的条件下进行了比较。的Pt / La中的活性2 ö 3 -R催化剂强烈地依赖于拉的杆形态2 ö 3 -R和强的Pt-的La 2 ö 3相互作用。来自Pt NPs与La 2 O 3 -R的{110}晶面的相互作用界面的化学吸附的活性氧物种负责改善Pt / La 2 O 3 -R催化剂的催化活性。Pt / La在烟灰氧化过程中，2 O 3 -R催化剂还显示出较高的活性稳定性和纳米结构。
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