纳米涂层对钙钛矿基整体式催化剂催化燃烧VOCs性能的影响

吕春旺; 陈鸿伟; 胡明江; 闫立强

doi:10.19906/j.cnki.JFCT.2021052

纳米涂层对钙钛矿基整体式催化剂催化燃烧VOCs性能的影响

doi: 10.19906/j.cnki.JFCT.2021052

1.
华北电力大学动力工程系，河北保定 071003
2.
河南城建学院能源与建筑环境工程学院，河南平顶山 467036

基金项目: 北京市自然科学基金（3214056），河南省科技攻关计划项目（212102210199）和河南城建学院科研创新团队支持计划项目（20TNSHUUC19）资助

详细信息

通讯作者:
E-mail：hdchw66@126.com

中图分类号: TQ630.9，X511
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出版历程
- 收稿日期: 2021-03-01
- 修回日期: 2021-04-05
- 网络出版日期: 2021-04-15
- 刊出日期: 2021-09-30

Effect of nano-coating on the catalytic combustion performance of perovskite-based monolithic catalysts for VOCs

1.
Department of Power Engineering, North China Electric Power University, Baoding 071003, China
2.
School of Energy and Building Environmental Engineering, Henan University of Urban Construction, Pingdingshan 467036, China

Funds: The project was supported by the Natural Science Foundation of Beijing (3214056), the Science and Technology Foundation of Henan Province (212102210199) and the Scientific Research and Innovation Team Support Project of Henan University of Urban Construction (20TNSHUUC19)

摘要

摘要: 以堇青石蜂窝陶瓷为基体，纳米氧化物（CeO₂、γ-Al₂O₃、SiO₂）为涂层载体，通过悬浮涂渍法和溶胶-凝胶法两步制得LaCoO₃/CeO₂/堇青石、LaCoO₃/γ-Al₂O₃/堇青石、LaCoO₃/SiO₂/堇青石三种整体式催化剂。通过XRD、SEM、XPS、H₂-TPR、UT和N₂吸附-脱附等技术，对样品的物相、微观形貌、元素成分、氧化还原性、黏附强度、质构性能进行了表征分析。通过催化燃烧VOCs实验评价了整体式催化剂的催化活性、高温稳定性、停机/重启循环稳定性和水汽稳定性。实验结果表明，三种催化剂均显示出良好的催化活性和稳定性，涂层类型会造成催化性能的差异。其中，LaCoO₃/CeO₂/堇青石催化剂表现出最优的性能。当甲苯体积分数为0.1%、空速为18000 mL/(g·h)时，其达到50%和90%转化率时温度分别为158和214 ℃；在转化率为90%的温度下经历72 h的稳定性测试（高温、停启循环、水汽）后，甲苯转换率仅降低7%。表征结果显示，CeO₂纳米涂层有助于形成多孔蓬松结构的催化层, 同时催化剂具有较高的吸附氧比例、较强的低温还原性以及良好的黏附性。
- 涂层 /
- 整体式催化剂 /
- 催化燃烧 /
- 钙钛矿 /
- 挥发性有机物
Abstract: The LaCoO₃/CeO₂/cordierite, LaCoO₃/γ-Al₂O₃/cordierite, LaCoO₃/SiO₂/cordierite monolithic catalysts were synthesized by the suspension coating method and sol-gel method in two steps using cordierite honeycomb ceramic as the substrate and nano-oxides (CeO₂, γ-Al₂O₃, SiO₂) as the coating carrier. The phase, microscopic morphology, element composition, redox property, adhesion strength, and texture properties of the samples were characterized and analyzed by XRD, SEM, XPS, H₂-TPR, UT and N₂ adsorption-desorption techniques. The catalytic activity, high-temperature stability, shutdown/restart cycle stability, and water vapor stability of the monolithic catalyst were evaluated through the catalytic combustion performance of VOCs. Experimental results show that three catalysts exhibit good catalytic activity and stability, and the type of coating can cause a difference in catalytic performance. Among three cattalysts, the LaCoO₃/CeO₂/cordierite catalyst has the best performance. When the volume fraction of toluene is 0.1% and the space velocity is 18000 mL/(g·h), the tempereratures for the conversion rates of 50% and 90% are 158 and 214 ℃, respectively. The toluene conversion rate is only reduced by 7% after 72 h of stability testing (high temperature, stop/restart cycle, water vapor). Characterization results show that the CeO₂ nano-coating helps to form a catalytic layer with a porous and fluffy structure, which makes the catalyst have a higher ratio of adsorbed oxygen, strong low-temperature reducibility and good adhesion.
- coating /
- monolithic catalyst /
- catalytic combustion /
- perovskite /
- VOCs

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FIG. 917. FIG. 917.

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图 1 催化活性测试实验示意图

1: N₂; 2: O₂; 3: toluene; 4: mass flowmeter; 5: mixing cylinder; 6: triple valve; 7: reactor; 8: gas chromatograph (GC); 9: exit

Figure 1 Experimental schematic of catalytic activity test

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图 2 不同样品的XRD谱图

Figure 2 X-ray diffraction patterns of different samples

a: powdered LaCoO₃; b: blank cordierite; c: LaCoO₃/cordierite; d: LaCoO₃/γ-Al₂O₃/cordierite; e: LaCoO₃/CeO₂/cordierite; f: LaCoO₃/SiO₂/cordierite

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图 3 不同样品的N₂吸附-脱附等温线(a)和孔径分布(b)

Figure 3 N₂ adsorption-desorption isotherms (a) and pore size distributions (b) of different samples

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图 4 不同样品的SEM照片

Figure 4 SEM images of different samples (a): blank cordierite; (b): γ-Al₂O₃/cordierite; (c): CeO₂/cordierite; (d): SiO₂/cordierite; (e), (i): LaCoO₃/cordierite; (f), (j): LaCoO₃/γ-Al₂O₃/cordierite; (g), (k): LaCoO₃/CeO₂/cordierite; (h), (l): LaCoO₃/SiO₂/cordierite

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图 5 LaCoO₃/γ-Al₂O₃、LaCoO₃/CeO₂、LaCoO₃/SiO₂和粉末状LaCoO₃的XPS谱图

Figure 5 XPS spectra of LaCoO₃/γ-Al₂O₃, LaCoO₃/CeO₂, LaCoO₃/SiO₂ and powdered LaCoO₃

(a): full spectra; (b): La 3d; (c): Co 2p; (d): O 1s

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图 6 不同样品的H₂-TPR谱图

Figure 6 H₂-TPR Profiles of different samples

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图 7 不同样品的脱落率

Figure 7 Weight loss of different samples

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图 8 甲苯催化燃烧活性测试

Figure 8 Activity test of toluene catalytic combustion

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图 9 甲苯催化燃烧稳定性测试

Figure 9 Stability test of toluene catalytic combustion

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表 1 样品的质构性质

Table 1 Textural properties of the samples

Sample	$S_{{\rm{BET}}}^{\rm{a}} $/(m²·g⁻¹)	$v_{ {\rm{p} } }^{\rm{b} }$/(cm³·g⁻¹)	$D_{{\rm{p}}}^{\rm{c}} $/nm
Cordierite	1.2	0.013	7.2
Al₂O₃	138.1	0.771	11.1
γ-Al₂O₃/cordierite	11.7	0.068	13.9
LaCoO₃/γ-Al₂O₃/cordierite	6.9	0.042	16.9
CeO₂	48.7	0.198	81.3
CeO₂/cordierite	3.3	0.016	10.0
LaCoO₃/CeO₂/cordierite	2.3	0.016	13.4
SiO₂	187.0	0.060	50.0
SiO₂/cordierite	11.9	0.080	21.5
LaCoO₃/SiO₂/cordierite	5.7	0.032	16.0
^a: surface area, calculated by BET method, ^b: total pore volume, determined from the amount adsorbed at p/p₀ = 0.99, ^c: average pore diameter, determined by BJH method of the desorption branch

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表 2 XPS表征参数

Table 2 XPS characterization parameters

Sample	Binding energy/eV							Co/La	O_ads/O_total
Sample	La 3d_5/2	La 3d_3/2	Co 2p_3/2	Co 2p_1/2	O_ads 1s	O_latt 1s	Ce 3d/Al 2p/Si 2p	Co/La	O_ads/O_total
LaCoO₃/γ-Al₂O₃	834.4/838	851.2/854.9	780.3	795.6	529.3	531.4	74.3	0.41	0.54
LaCoO₃/CeO₂	834.3/837.8	850.9/854.8	780.2	795.4	529.3	531.4	882.5	0.52	0.64
LaCoO₃/SiO₂	834.5/837.9	851.1/854.9	780.2	795.4	529.5	531.0	103.2	0.38	0.24
LaCoO₃	833.7/837.5	850.6/854.4	779.9	795.2	529.0	531.1	−	0.55	0.651

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表 3 本研究与其他文献中催化剂的甲苯催化燃烧性能比较

Table 3 Catalysts comparison of toluene catalytic combustion performance in this work and other literature

Catalyst	Toluene	GHSV	T50/℃	T90/℃	Reference
LaCoO₃/CeO₂/cordierite	0.1%	18000 mL/(g·h)	158	214	this work
LaCoO₃/γ-Al₂O₃/cordierite			180	219
LaCoO₃/SiO₂/cordierite			176	230
LaMnO₃/TiO₂	0.1%	18000 mL/(g·h)	278	303	[20]
LaMnO₃/YSZ	0.1%	18000 mL/(g·h)	235	247	[20]
Co/La-CeO₂/cordierite	0.1%	12000 mL/(g·h)	253	286	[38]
Co/La-CeO₂	0.1%	12000 mL/(g·h)	229	258	[38]
0.05La-Co	0.1%	20000 mL/(g·h)	218	224	[39]
LaMnO₃-PL-2	0.1%	20000 mL/(g·h)	226	249	[40]
3DOM-La_0.8Ce_0.2MnO₃/cordierite (600 ℃)	0.05%	6000 h⁻¹	147	217	[19]
3DOM-La_0.8Ce_0.2MnO₃/cordierite (700 ℃)			162	249
3DOM-La_0.8Ce_0.2MnO₃/cordierite (800 ℃)			190	320
La_0.75Sr_0.25CoO₃	0.05%	30000 h⁻¹	212	228	[41]
LaZn_0.3Fe_0.7O₃	0.2%	15000 h⁻¹	222	310
NiMnO₃/Ce_0.75Zr_0.25O₂/cordierit	500 mg/m³	15000 h⁻¹	209	235	[42]
20%La_0.8Ce_0.2MnO₃/ZSM-5	3 mg/L	20000 h⁻¹	206	285	[43]

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参考文献(43)

[1]	HE C, CHENG J, ZHANG X, ZHANG X, DOUTHWAITE M, HAO Z. Recent advances in the catalytic oxidation of volatile organic compounds: a review based on pollutant sorts and sources[J]. Chem Rev,2019,119(7):4471−4568. doi: 10.1021/acs.chemrev.8b00408
[2]	MANISALIDIS I, STAVROPOULOU E, STAVROPOULOS A, BEZIRTZOGLOU E. Environmental and health impacts of air pollution: a review[J]. Front Public Health,2020,8:14. doi: 10.3389/fpubh.2020.00014
[3]	GRANGER P. Challenges and breakthroughs in post-combustion catalysis: how to match future stringent regulations[J]. Catal Sci Technol,2017,7(22):5195−5211. doi: 10.1039/C7CY00983F
[4]	ZHU J, LI H, ZHONG L, XIAO P, XU X, YANG X, ZHAO Z, LI J. Perovskite oxides: preparation, characterizations, and applications in heterogeneous catalysis[J]. ACS Catal,2014,4(9):2917−2940. doi: 10.1021/cs500606g
[5]	胡明江, 吕春旺, 杨师斌, 王忠. La_1-xAl_xFeO₃催化剂降低甲醇/柴油二元燃料发动机非常规排放研究[J]. 环境科学学报,2018,38(4):1437−1445. HU Ming-jiang, LV Chun-wang, YANG Shi-bin, WANG Zhong. Research of effects on irregular exhaust emissions control from methanol-diesel engine with La_1−xAl_xFeO₃ catalysts[J]. Acta Sci Circum,2018,38(4):1437−1445.
[6]	ZANG M, ZHAO C, WANG Y, CHEN S. A review of recent advances in catalytic combustion of VOCs on perovskite-type catalysts[J]. J Saudi Chem Soc,2019,23(6):645−654. doi: 10.1016/j.jscs.2019.01.004
[7]	胡明江, 刘海燕, 吕春旺, 赵丽霞, 张志远. 基于LaFe_1−xPd_xO₃纳米纤维的三明治结构甲苯传感器研究[J]. 分析化学,2020,48(1):66−73. HU Ming-jiang, LIU Hai-yan, LV Chun-wang, ZAHO Li-xia, ZHANG Zhi-yuan. Study on Sandwich Structure Toluene Sensor Based on LaFe_1−xPd_xO₃ Nanofibers[J]. Chin J Anal Chem,2020,48(1):66−73.
[8]	HOSSEINI S, MOGHADDAS H, MASOUDI SOLTANI S, KHEAWHOM S. Technological applications of honeycomb monoliths in environmental processes: A review[J]. Process Saf Environ,2020,133:286−300. doi: 10.1016/j.psep.2019.11.020
[9]	KEAV S, MATAM S, FERRI D, WEIDENKAFF A. Structured perovskite-based catalysts and their application as three-way catalytic converters-a review[J]. Catalysts,2014,4(3):226−255. doi: 10.3390/catal4030226
[10]	TOMAŠIĆ V, JOVIĆ F. State-of-the-art in the monolithic catalysts/reactors[J]. Appl Catal A: Gen,2006,311:112−121. doi: 10.1016/j.apcata.2006.06.013
[11]	YUAN J, ZHAO K, CAI T, GAO Z, YANG L, HE D. One-step dip-coating of uniform γ-Al₂O₃ layers on cordierite honeycombs and its environmental applications[J]. Ceram Int,2016,42(13):14384−14390. doi: 10.1016/j.ceramint.2016.06.003
[12]	ALMOHAMADI H, SMITH K J. Beneficial effect of adding γ-AlOOH to the γ-Al₂O₃ washcoat of a PdO catalyst for methane oxidation[J]. Can J Chem Eng,2019,98(1):281−293.
[13]	ZHOU T, LI L, CHENG J, HAO Z. Preparation of binary washcoat deposited on cordierite substrate for catalytic applications[J]. Ceram Int,2010,36(2):529−534. doi: 10.1016/j.ceramint.2009.09.027
[14]	SOLOVIEV S O, KYRIIENKO P I, POPOVYCH N O. Effect of CeO₂ and Al₂O₃ on the activity of Pd/Co₃O₄/cordierite catalyst in the three-way catalysis reactions (CO/NO/C_nH_m)[J]. J Environ Sci,2012,24(7):1327−1333. doi: 10.1016/S1001-0742(11)60930-3
[15]	NIKOOFAR K, SHAHEDI Y, CHENARBOO F J J M-R I O C. Nano alumina catalytic applications in organic transformations[J]. Mini-Rev Org Chem, 2019, 16(2): 102−110.
[16]	李淑婵. 定—转子反应器中制备Ce_0.5Zr_0.5O₂催化剂载体[D]. 北京: 北京化工大学, 2016. LI Shu-can. Preparation of Ce_0.5Zr_0.5O₂ nano-support in rotor-stator reactor[D]. Beijing: Beijing University of Chemical Technology, 2016.
[17]	张庆, 张洪泉, 白涛. 基于γ-A1₂O₃-ZrO₂-ThO₂的Pd基催化剂载体制备及应用[J]. 实验技术与管理,2020,37(1):56−58+70. ZHANG Qing, ZHANG Hong-quan, BAI Tao. Preparation and application experiment for Pd catalyst carrier based on γ-A1₂O₃-ZrO₂-ThO₂[J]. Exp Technol Manage,2020,37(1):56−58+70.
[18]	PRIETO G, TUYSUZ H, DUYCKAERTS N, KNOSSALLA J, WANG G, SCHÜTH F. Hollow nano- and microstructures as catalysts[J]. Chem Rev,2016,116(22):14056−14119. doi: 10.1021/acs.chemrev.6b00374
[19]	TANG L, ZHAO Z, WEI Y, LIU J, PENG Y, LI K. Study on the coating of nano-particle and 3DOM LaCoO₃ perovskite-type complex oxide on cordierite monolith and the catalytic performances for soot oxidation: The effect of washcoat materials of alumina, silica and titania[J]. Catal Today,2017,297:131−142. doi: 10.1016/j.cattod.2017.06.016
[20]	GIROIR-FENDLER A, ALVES-FORTUNATO M, RICHARD M, WANG C, ANTONIODÍAZA J, GIL S, ZHANG C, CAN F, BION N, GUO Y. Synthesis of oxide supported LaMnO₃ perovskites to enhance yields in toluene combustion[J]. Appl Catal B: Environ,2016,180:29−37. doi: 10.1016/j.apcatb.2015.06.005
[21]	VILLORIA J A, ALVAREZ-GALVAN M C, AL-ZAHRANI S M, PALMISANOC P, SPECCHIA S, SPECCHIA V, FIERROA J L G, NAVARRO R M. Oxidative reforming of diesel fuel over LaCoO₃ perovskite derived catalysts: Influence of perovskite synthesis method on catalyst properties and performance[J]. Appl Catal B-Environ,2011,105(3/4):276−288. doi: 10.1016/j.apcatb.2011.04.010
[22]	GUIOTTO M, PACELLA M, PERIN G, IOVINO A, MICHELON N, NATILE M M, GLISENTI A, CANU P. Washcoating vs. direct synthesis of LaCoO₃ on monoliths for environmental applications[J]. Appl Catal A: Gen,2015,499:146−157. doi: 10.1016/j.apcata.2015.04.013
[23]	HAGELIN-WEAVER H A E, HOFLUND G B, MINAHAN D M, SALAITA G N. Electron energy loss spectroscopic investigation of Co metal, CoO, and Co₃O₄ before and after Ar⁺ bombardment[J]. Appl Surf Sci,2004,235(4):420−448. doi: 10.1016/j.apsusc.2004.02.062
[24]	CARLEY A F, ROBERTS M W, SANTRA A K. Interaction of oxygen and carbon monoxide with csau surfaces[J]. J Phys Chem B,1997,101(48):9978−9983. doi: 10.1021/jp971780+
[25]	KALIAGUINE S, NESTE A V, SZABO V, GALLOT J E, MUZYCHUK R. Perovskite-type oxides synthesized by reactive grinding: Part I. Preparation and characterization[J], Appl Catal A-Gen, 2001, 209(1–2): 345−358.
[26]	ASHOK J, DAS S, DEWANGAN N, KAWI S. H₂S and NO_x tolerance capability of CeO₂ doped La_1−xCe_xCo_0.5Ti_0.5O_3−δ perovskites for steam reforming of biomass tar model reaction[J]. Energ Convers Manage,2019,1:10003.
[27]	LI Y, WU L, WANG Y, KE P, GUAN B. γ-Al₂O₃ doped with cerium to enhance electron transfer in catalytic ozonation of phenol[J]. J Water Process Eng,2020,36:101313.
[28]	WANG L, CHEN M, YU X, ZHAO Z, FAN X,WEI Y, LIU J. Preparation, characterization and catalytic performance of ordered macroporous-mesoporous SiO₂-supported MnMO_x catalysts for soot combustion[J]. Catal Today,2020,364:21−34.
[29]	TIAN M, HE C, YU Y, PAN H, SMITH L, JIANG Z, GAO N, JIAN Y, HAO Z, ZHU Q. Catalytic oxidation of 1, 2-dichloroethane over three-dimensional ordered meso-macroporous Co₃O₄/La_0.7Sr_0.3Fe_0.5Co_0.5O₃: Destruction route and mechanism[J]. Appl Catal A: Gen,2018,553:1−14. doi: 10.1016/j.apcata.2018.01.013
[30]	ROYER S, BÉRUBÉ F, KALIAGUINE S. Effect of the synthesis conditions on the redox and catalytic properties in oxidation reactions of LaCo_1−xFe_xO₃[J]. Appl Catal A: Gen,2005,282(1/2):273−284. doi: 10.1016/j.apcata.2004.12.018
[31]	BRACKMANN R, PEREZ C A, SCHMAL M. LaCoO₃ perovskite on ceramic monoliths – Pre and post reaction analyzes of the partial oxidation of methane[J]. Int J Hydrogen Energy,2014,39(26):13991−14007. doi: 10.1016/j.ijhydene.2014.07.027
[32]	LIANG H, HONG Y, ZHU C, LI S, CHEN Y, LIU Z, YE D. Influence of partial Mn-substitution on surface oxygen species of LaCoO₃ catalysts[J]. Catal Today,2013,201:98−102. doi: 10.1016/j.cattod.2012.04.036
[33]	ZHENG Y, LI K, WANG H, TIAN D, WANG Y, ZHU X, WEI Y, ZHENG M, LUO Y. Designed oxygen carriers from macroporous LaFeO₃ supported CeO₂ for chemical-looping reforming of methane[J]. Appl Catal B: Environ,2017,202:51−63. doi: 10.1016/j.apcatb.2016.08.024
[34]	HWANG J, HA H J, RYU J H, CHOI J J, AHN C W, KIM J W, HAHN D B, YOON W H, LEE H, CHOI J J. Enhancement of washcoat adhesion for SCR catalysts to convert nitrogen oxide using powder spray coating of TiO₂ on metallic honeycomb substrate[J]. Catal Commun,2017,94:1−4. doi: 10.1016/j.catcom.2017.02.002
[35]	TARJOMANNEJAD A, FARZI A, NIAEI A, SALARI D. An experimental and kinetic study of toluene oxidation over LaMn_1−xB_xO₃ and La_0.8A_0.2Mn_0.3B_0.7O₃ (A=Sr, Ce and B=Cu, Fe) nano-perovskite catalysts[J]. Korean J Chem Eng,2016,33(9):2628−2637. doi: 10.1007/s11814-016-0108-4
[36]	张巍, 汤云灏, 尹艳山, 龚蔚成, 宋健, 马英, 阮敏, 徐慧芳, 陈冬林. 改性镧系钙钛矿催化剂强化挥发性有机物催化氧化的研究进展[J]. 化工进展,2021,40(3):1425−1437. ZHANG Wei, TANG Yun-hao, YIN Yan-shan, GONG Wei-cheng, SONG Jian, MA Ying, RUAN Min, XU Hui-fang, CHEN Dong-lin. Research progress in enhanced catalytic oxidation of VOCs by modified La-based perocskite catalyst[J]. Chem Ind Eng Process,2021,40(3):1425−1437.
[37]	刘晓刚, 闫梦雪, 许茹雯, 孙巾茹, 王虹, 迟姚玲, 李翠清, 宋永吉. La_1−xRb_xMnO₃钙钛矿催化剂同时消除NO和碳烟的催化性能[J]. 燃料化学学报,2019,47(9):1053−1066. doi: 10.3969/j.issn.0253-2409.2019.09.004 LIU Xiao-gang, YAN Meng-xue, XU Ru-wen, SUN Jin-ru, WANG Hong, CHI Yao-ling, LI Cui-qing, SONG Yong-ji. Catalytic performance of La_1−xRb_xMnO₃ perovskite in the simultaneous removal of NO and soot[J]. J Fuel Chem Technol,2019,47(9):1053−1066. doi: 10.3969/j.issn.0253-2409.2019.09.004
[38]	GÓMEZ D M, GATICA J M, HERNáNDEZ-GARRIDO J C, CIFREDO G, MONTES M, SANZ O, REBLED J M, VIDAL H. A novel CoO_x/La-modified-CeO₂ formulation for powdered and washcoated onto cordierite honeycomb catalysts with application in VOCs oxidation[J]. Appl Catal B: Environ,2014,144:425−434. doi: 10.1016/j.apcatb.2013.07.045
[39]	WU M, CHEN S, SOOMRO A, MA S, ZHU M, HUA X, XIANG W. Investigation of synergistic effects and high performance of La-Co composite oxides for toluene catalytic oxidation at low temperature[J]. Environ Sci Pollut Res,2019,26(12):12123−12135.
[40]	ZHANG C, GUO Y, GUO Y, LU G, BOREAVE A, RETAILLEAU L, BAYLET A, GIROIR-FENDLER A. LaMnO₃ perovskite oxides prepared by different methods for catalytic oxidation of toluene[J]. Appl Catal B: Environ,2014,148−149.
[41]	PEREÑÍGUEZ R, HUESO J L, GAILLARD F, HOLGADO J, CABALLERO A. Study of oxygen reactivity in La_1−xSr_xCoO_3−δ perovskites for total oxidation of toluene[J]. Catal Lett,2012,142(4):408−416. doi: 10.1007/s10562-012-0799-z
[42]	DENG L, HUANG C, KAN J, LI B, CHEN Y, ZHU S, SHEN S. Effect of coating modification of cordierite carrier on catalytic performance of supported NiMnO₃ catalysts for VOCs combustion[J]. J Rare Earths,2018,36(3):265−272. doi: 10.1016/j.jre.2017.07.015
[43]	WANG Y, XIAO L, ZHAO CC, LIU F, LI S. Catalytic combustion of toluene with Pd/La_0.8Ce_0.2MnO₃ supported on different zeolites[J]. Environ Prog Sustainable Energy,2018,37(1):101313.