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Roles of Ru on the V2O5–WO3/TiO2 Catalyst for the Simultaneous Purification of NOx and Chlorobenzene: A Dechlorination Promoter and a Redox Inductor
ACS Catalysis ( IF 11.3 ) Pub Date : 2022-09-07 , DOI: 10.1021/acscatal.2c03782 Zijian Song 1 , Yue Peng 1 , Xiaoguang Zhao 2 , Hao Liu 1 , Chuan Gao 1 , Wenzhe Si 1 , Junhua Li 1
ACS Catalysis ( IF 11.3 ) Pub Date : 2022-09-07 , DOI: 10.1021/acscatal.2c03782 Zijian Song 1 , Yue Peng 1 , Xiaoguang Zhao 2 , Hao Liu 1 , Chuan Gao 1 , Wenzhe Si 1 , Junhua Li 1
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The effects of Ru on the V2O5–WO3/TiO2 catalyst were studied in NOx and chlorobenzene (CB) simultaneous controls in terms of promoting the C–Cl cleavage and decreasing polychlorinated species. Herein, we synthesized Ru-modified vanadia-based catalysts, which demonstrated stable NOx and CB conversions with high selectivity to N2, CO2, and HCl. The newly formed V–O–Ru chains on the surface strengthened the electron capability and narrowed down the band gap of vanadium, which weakened the Lewis acid sites to avoid the generation of polychlorinated species via electrophilic reactions. The formation of oxygen vacancies on Ru–O–Ti was considerably enhanced compared with that on V = O, V–O–V, and V–O–Ti, leading to the acceleration in the ring opening of benzoates, whereas the selective catalytic reduction (SCR) performance below 325 °C remained the same. Ru modification lowered the energy barriers of the C–Cl cleavage and elevated the energy barriers of CB dehydrogenation and chlorination, which are critical steps in CB oxidation and byproduct formation, respectively.
中文翻译：
Ru 在 V2O5–WO3/TiO2 催化剂上的作用，用于同时净化 NOx 和氯苯：脱氯促进剂和氧化还原诱导剂
研究了Ru对V 2 O 5 -WO 3 /TiO 2催化剂在NO x和氯苯（CB）同时控制下促进C-Cl裂解和减少多氯物种的影响。在此，我们合成了 Ru 改性的钒基催化剂，该催化剂表现出稳定的 NO x和 CB 转化，对 N 2、CO 2具有高选择性。，和盐酸。表面新形成的V-O-Ru链增强了电子能力，缩小了钒的带隙，削弱了路易斯酸位点，避免了通过亲电反应产生多氯化合物。与 V = O、V-O-V 和 V-O-Ti 相比，Ru-O-Ti 上氧空位的形成显着增强，导致苯甲酸盐的开环加速，而选择性催化低于 325 °C 的还原 (SCR) 性能保持不变。Ru改性降低了C-Cl裂解的能垒，提高了CB脱氢和氯化的能垒，这分别是CB氧化和副产物形成的关键步骤。
更新日期：2022-09-07
中文翻译：
Ru 在 V2O5–WO3/TiO2 催化剂上的作用，用于同时净化 NOx 和氯苯：脱氯促进剂和氧化还原诱导剂
研究了Ru对V 2 O 5 -WO 3 /TiO 2催化剂在NO x和氯苯（CB）同时控制下促进C-Cl裂解和减少多氯物种的影响。在此，我们合成了 Ru 改性的钒基催化剂，该催化剂表现出稳定的 NO x和 CB 转化，对 N 2、CO 2具有高选择性。，和盐酸。表面新形成的V-O-Ru链增强了电子能力，缩小了钒的带隙，削弱了路易斯酸位点，避免了通过亲电反应产生多氯化合物。与 V = O、V-O-V 和 V-O-Ti 相比，Ru-O-Ti 上氧空位的形成显着增强，导致苯甲酸盐的开环加速，而选择性催化低于 325 °C 的还原 (SCR) 性能保持不变。Ru改性降低了C-Cl裂解的能垒，提高了CB脱氢和氯化的能垒，这分别是CB氧化和副产物形成的关键步骤。
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