Cerium and tin oxides anchored onto reduced graphene oxide for selective catalytic reduction of NO with NH3 at low temperatures

Wang Yanli; Kang Ying; Ge Meng; Zhang Xiu; Zhan Liang

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Cerium and tin oxides anchored onto reduced graphene oxide for selective catalytic reduction of NO with NH3 at low temperatures

机译：铈和锡氧化物锚定在氧化物还原的石墨烯氧化物上，以在低温下选择性催化还原NH 3

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A series of cerium and tin oxides anchored on reduced graphene oxide (CeO2-SnOx/rGO) catalysts are synthesized using a hydrothermal method and their catalytic activities are investigated by selective catalytic reduction (SCR) of NO with NH3 in the temperature range of 120-280 degrees C. The results indicate that the CeO2-SnOx/rGO catalyst shows high SCR activity and high selectivity to N-2 in the temperature range of 120-280 degrees C. The catalyst with a mass ratio of (Ce + Sn)/GO = 3.9 exhibits NO conversion of about 86% at 160 degrees C, above 97% NO conversion at temperatures of 200-280 degrees C and higher than 95% N-2 selectivity at 120-280 degrees C. In addition, the catalyst presents a certain SO2 resistance. It is found that the highly dispersed CeO2 nanoparticles are deposited on the surface of rGO nanosheets, because of the incorporation of Sn4+ into the lattice of CeO2. The mesoporous structures of the CeO2-SnOx/rGO catalyst provides a large specific surface area and more active sites for facilitating the adsorption of reactant species, leading to high SCR activity. More importantly, the synergistic interaction between cerium and tin oxides is responsible for the excellent SCR activity, which results in a higher ratio of Ce3+/(Ce3+ + Ce4+), higher concentrations of surface chemisorbed oxygen and oxygen vacancies, more strong acid sites and stronger acid strength on the surface of the CeSn(3.9)/rGO catalyst.

机译：使用水热法合成锚定的一系列铈和氧化锡（CeO 2-Snox / Rgo）催化剂，通过在120-温度范围内的NH 3中选择催化活性，通过选择性催化还原（SCR）来研究它们的催化活性。结果表明，CEO2-SNOX / RGO催化剂在120-280℃的温度范围内显示出高的SCR活性和高选择性对N-2的温度范围。（CE + Sn）/的催化剂/ Go = 3.9在160摄氏度下表现出约86％的转化，高于97％，在200-280℃的温度下，高于95％N-2选择性，120-280℃。此外，催化剂呈现某种SO2抵抗力。发现高度分散的CeO2纳米颗粒沉积在Rgo Nanosheets的表面上，因为将SN4 +掺入CeO 2的晶格中。 CEO2-SNOX / RGO催化剂的介孔结构提供了大的比表面积和更具活性位点，以促进反应物种的吸附，导致高SCR活性。更重要的是，铈和锡氧化物之间的协同相互作用是优异的SCR活性，这导致Ce3 + /（Ce3 + + Ce4 +）的比例更高，高浓度的表面化学氧气和氧空位，更强烈的酸部位和更强的表面CESN（3.9）/ RGO催化剂表面上的酸强度。

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《RSC Advances》 |2018年第63期|共9页
作者
Wang Yanli; Kang Ying; Ge Meng; Zhang Xiu; Zhan Liang;
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East China Univ Sci &

Technol Shanghai Key Lab Multiphase Mat Chem Engn Key Lab Specially Funct Polymers &

Related Techno State Key Lab Chem Engn Minist Educ Shanghai 200237 Peoples R China;

East China Univ Sci &

Technol Shanghai Key Lab Multiphase Mat Chem Engn Key Lab Specially Funct Polymers &

Related Techno State Key Lab Chem Engn Minist Educ Shanghai 200237 Peoples R China;

East China Univ Sci &

Technol Shanghai Key Lab Multiphase Mat Chem Engn Key Lab Specially Funct Polymers &

Related Techno State Key Lab Chem Engn Minist Educ Shanghai 200237 Peoples R China;

East China Univ Sci &

Technol Shanghai Key Lab Multiphase Mat Chem Engn Key Lab Specially Funct Polymers &

Related Techno State Key Lab Chem Engn Minist Educ Shanghai 200237 Peoples R China;

East China Univ Sci &

Technol Shanghai Key Lab Multiphase Mat Chem Engn Key Lab Specially Funct Polymers &

Related Techno State Key Lab Chem Engn Minist Educ Shanghai 200237 Peoples R China;

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1. Cerium and tin oxides anchored onto reduced graphene oxide for selective catalytic reduction of NO with NH3 at low temperatures [J] . Wang Yanli, Kang Ying, Ge Meng, RSC Advances . 2018,第63期

机译：铈和锡氧化物锚定在氧化物还原的石墨烯氧化物上，以在低温下选择性催化还原NH 3
2. Cerium and tin oxides anchored onto reduced graphene oxide for selective catalytic reduction of NO with NH3 at low temperatures [J] . Yanli Wang, Ying Kang, Meng Ge, RSC Advances . 2018,第63期

机译：铈和锡氧化物固定在还原的氧化石墨烯上，用于在低温下用NH3选择性催化还原NO
3. N-doped graphene and TiO2 supported manganese and cerium oxides on low-temperature selective catalytic reduction of NOx with NH3 [J] . Chunlin Zhao, Yanxia Wu, Hailong Liang, Journal of Advanced Ceramics . 2018,第3期

机译：氮掺杂石墨烯和TiO2负载的锰和铈氧化物对NH3低温选择性催化还原NOx的影响
4. LOW TEMPERATURE SELECTIVE CATALYTIC REDUCTION OF NO AND NO2 WITH NH3 OVER ACTIVATED CARBON-SUPPORTED VANADIUM OXIDE CATALYST [C] . Xiang Gao, Yang Zhang, Shaojun Liu, 6th international conference on environmental catalysis : Abstract book . 2010

机译：活性炭负载氧化钒催化剂上的NH3低温选择性催化还原NO和NO2
5. Characterization and reaction mechanism for the selective catalytic reduction of nitrogen oxides using natural and copper modified clay catalysts with ammonia as a reducing agent. [D] . Corral-Avitia, Alba Yadira. 2001

机译：使用天然和铜改性的粘土催化剂，以氨为还原剂，选择性催化还原氮氧化物的表征和反应机理。
6. Simple Synthesis of Cobalt Carbonate Hydroxide Hydrate and Reduced Graphene Oxide Hybrid Structure for High-Performance Room Temperature NH3 Sensor [O] . Chang Wang, Huan Wang, Dan Zhao, 2019

机译：用于高性能室温NH3传感器的碳酸钴氢氧化物水合物的简单合成和还原的氧化石墨烯杂化结构
7. Cerium and tin oxides anchored onto reduced graphene oxide for selective catalytic reduction of NO with NH3at low temperatures [O] . Yanli Wang, Ying Kang, Meng Ge, 2018

机译：铈和锡氧化物锚定到石墨烯氧化物上，用于选择性催化还原NH3AT低温

Cerium and tin oxides anchored onto reduced graphene oxide for selective catalytic reduction of NO with NH3 at low temperatures

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