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Study on catalytic performances and mechanism of La-modified Pt-Pd/CeZrO
x catalysts for CO oxidation- Low-Carbon Chemistry and Chemical Engineering Vol. 51, Issue 3, Pages: 32-40(2026)
- 作者机构：
中石化石油化工科学研究院有限公司，北京 100083
- 作者简介：
- 基金信息：
DOI：10.12434/j.issn.2097-2547.20250122
CLC： TQ426.6Received：19 March 2025，
Revised：2025-04-20，
Published：25 March 2026
- 稿件说明：
移动端阅览
鲍晓艳,李博,朱莹等.La改性Pt-Pd/CeZrOx催化剂催化CO氧化性能及机理研究[J].低碳化学与化工,2026,51(3):32-40.
BAO Xiaoyan,LI Bo,ZHU Ying,et al.Study on catalytic performances and mechanism of La-modified Pt-Pd/CeZrOx catalysts for CO oxidation[J].Low-Carbon Chemistry and Chemical Engineering,2026,51(3):32-40.
鲍晓艳,李博,朱莹等.La改性Pt-Pd/CeZrOx催化剂催化CO氧化性能及机理研究[J].低碳化学与化工,2026,51(3):32-40. DOI： 10.12434/j.issn.2097-2547.20250122.
BAO Xiaoyan,LI Bo,ZHU Ying,et al.Study on catalytic performances and mechanism of La-modified Pt-Pd/CeZrOx catalysts for CO oxidation[J].Low-Carbon Chemistry and Chemical Engineering,2026,51(3):32-40. DOI： 10.12434/j.issn.2097-2547.20250122.
摘要
CO催化氧化技术是实现“碳中和”目标的关键技术之一。将La引入CeZrO
x
中，并采用浸渍法负载贵金属Pt和Pd，制备了Pt-Pd基双金属催化剂。通过XRD、XPS和H
2
-TPR等表征分析，探究了La改性对催化剂结构、表面元素价态、吸附性能和催化CO氧化机理的影响机制。结果表明，添加的La与CeZrO
x
形成了稳定的CeZrLaO
x
固溶体结构，增大了催化剂的比表面积和表面氧空位浓度。其中，Pt-Pd/CeZrLaO
x
-5%表现出良好的催化CO氧化性能，在温度为100~450 ℃、体积空速为150000 h
-1
条件下，CO转化率为50%和90%时的反应温度分别为165.7 ℃和222.0 ℃。in situ DRIFTS结果表明，在Pt-Pd/CeZrO
x
中，CO的线性吸附主要发生在Pd
2+
位点，La增强了Pt
2+
位点的吸附性能，并形成了Pt-Pd双活性位点的协同作用机制，进而促进了催化剂表面碳酸盐中间物种的快速转化，有助于提高催化剂催化CO氧化性能。
Abstract
CO catalytic oxidation technology is one of the key technologies for achieving “carbon neutrality” goal. La was introduced into CeZrO
x
and then noble metal Pt and Pd were loaded by impregnation method to prepare Pt-Pd based bimetallic catalysts. By characterization techniques such as XRD
XPS and H
2
-TPR
the effects of La modification on the structures
valence states of surface elements
adsorption properties and CO oxidation mechanism of the catalysts were explored. The results show that the La forms a stable CeZrLaO
x
solid solution structure with CeZrO
x
increasing the specific surface area and concentration of surface oxygen vacancy of the catalysts. Pt-Pd/CeZrLaO
x
-5% exhibits excellent catalytic performance for CO oxidation. Under the temperature from 100 ℃ to 450 ℃ and space velocity of 150000 h
-1
the reaction temperatures for CO conversion rates of 50% and 90% are 165.7 ℃ and 222.0 ℃
respectively. In situ DRIFTS results indicate that on the Pt-Pd/CeZrO
x
the linear adsorption of CO mainly takes place on Pd
2+
sites. La enhances the adsorption capacity of Pt
2+
sites to form a synergistic mechanism of Pt-Pd dual active sites
thereby promoting the rapid transformation of carbonate intermediates on the catalyst surface and improving the catalytic performances of the catalysts for CO oxidation.
关键词
Keywords
references
彭召静 , 王涛 , 程彦虎 , 等 . CO氧化消除催化剂的研究进展 [J ] . 工业催化 , 2024 , 32 ( 6 ): 14 - 22 .
PENG Z J , WANG T , CHENG Y H , et al . Research progress on catalysts for CO oxidation elimination [J ] . Industrial Catalysis , 2024 , 32 ( 6 ): 14 - 22 .
LIU C W , LI J , WANG M , et al . Promotional effect of stannum on Pd/CeO 2 catalysts for CO and C 3 H 6 co-oxidation [J ] . Journal of Rare Earths , 2025 , 43 ( 3 ): 508 - 515 .
WANG M Z , MA P J , WU Z Z , et al . Evolution of Pd chemical states and effects of C 3 H 6 and H 2 O on the CO oxidation over Pd/CeO 2 catalyst [J ] . Applied Surface Science , 2022 , 599 : 153897 .
张昭良 , 何洪 , 赵震 . 汽车尾气三效催化剂研究和应用40年 [J ] . 环境化学 , 2021 , 40 ( 7 ): 1937 - 1944 .
ZHANG Z L , HE H , ZHANG Z . 40 years of research and application of three-way catalysts for gasoline automobiles [J ] . Environmental Chemistry , 2021 , 40 ( 7 ): 1937 - 1944 .
XI K , WANG Y , JIANG K , et al . Support interaction of Pt/CeO 2 and Pt/SiC catalysts prepared by nano platinum colloid deposition for CO oxidation [J ] . Journal of Rare Earths , 2020 , 38 ( 4 ): 376 - 383 .
YAO P , HUANG Y , JIAO Y , et al . Soot oxidation over Pt-loaded CeO 2 -ZrO 2 catalysts under gasoline exhaust conditions: Soot-catalyst contact efficiency and Pt chemical state [J ] . Fuel , 2023 , 334 : 126782 .
朱莹 , 刘晶晶 , 连志华 , 等 . Nb掺杂对CeO 2 -SnO 2 催化剂NH 3 -SCR活性的促进作用 [J ] . 环境工程学报 , 2023 , 17 ( 8 ): 2645 - 2654 .
ZHU Y , LIU J J , LIAN Z H , et al . Promotional effect of Nb doping on NH 3 -SCR activity over CeO 2 -SnO 2 oxide catalyst [J ] . Chinese Journal of Environmental Engineering , 2023 , 17 ( 8 ): 2646 - 2654 .
蔡明昌 , 王慧 , 税安泽 , 等 . 稀土在汽车尾气净化催化剂中的应用现状 [J ] . 稀有金属快报 , 2006 , 25 ( 3 ): 13 - 17 .
CAI M C , WANG H , SHUI A Z , et al . Current application of rare-earth in catalyst for cleaning the automotive off-gas [J ] . Rare Metals Letters , 2006 , 25 ( 3 ): 13 - 17 .
MOURA J S , SILVA LIMA FONSECA J , BION N , et al . Effect of lanthanum on the properties of copper, cerium and zirconium catalysts for preferential oxidation of carbon monoxide [J ] . Catalysis Today , 2014 , 228 : 40 - 50 .
LEE D W , KIM S J , LEE J S , et al . Understanding improved thermal stability of lanthanum-modified Cu/CeO 2 -ZrO 2 for CO oxidation under lean-burn exhaust conditions [J ] . Applied Catalysis A: General , 2023 , 663 : 119293 .
LEE J S , LEE M W , KIM M J , et al . Effects of La incorporation in catalytic activity of Ag/La-CeO 2 catalysts for soot oxidation [J ] . Journal of Hazardous Materials , 2021 , 414 : 125523 .
ZHANG L J , CUI M S , WANG H , et al . Effects of co-precipitation temperature on structure and properties of La and Y doped cerium zirconium mixed oxides [J ] . Transactions of Nonferrous Metals Society of China , 2022 , 32 ( 2 ): 618 - 628 .
ZHOU Y , DENG J , XIONG L , et al . Synthesis and study of nanostructured Ce-Zr-La-RE-O (RE = Y, Nd and Pr) quaternary solid solutions and their supported three-way catalysts [J ] . Materials & Design , 2017 , 130 : 149 - 156 .
ZHANG Q , MO S P , LI J Q , et al . In situ DRIFT spectroscopy insights into the reaction mechanism of CO and toluene co-oxidation over Pt-based catalysts [J ] . Catalysis Science & Technology , 2019 , 9 ( 17 ): 4538 - 4551 .
YANG Z Z , HU W , ZHANG N , et al . Facile synthesis of ceria-zirconia solid solutions with cubic-tetragonal interfaces and their enhanced catalytic performance in diesel soot oxidation [J ] . Journal of Catalysis , 2019 , 377 : 98 - 109 .
YANG Z Z , ZHANG N , CAO Y , et al . Promotional effect of lanthana on the high-temperature thermal stability of Pt/TiO 2 sulfur-resistant diesel oxidation catalysts [J ] . RSC Advances , 2017 , 7 ( 31 ): 19318 - 19329 .
WANG H L , LIU S , ZHAO Z , et al . Activation and deactivation of Ag/CeO 2 during soot oxidation: Influences of interfacial ceria reduction [J ] . Catalysis Science & Technology , 2017 , 7 ( 10 ): 2129 - 2139 .
TSONCHEVA T , IVANOVA R , HENYCH J , et al . Effect of preparation procedure on the formation of nanostructured ceria-zirconia mixed oxide catalysts for ethyl acetate oxidation: Homogeneous precipitation with urea vs template-assisted hydrothermal synthesis [J ] . Applied Catalysis A: General , 2015 , 502 : 418 - 432 .
ZHAO F , LI S D , CHEN Y F . Enhanced thermal stability and oxygen storage capacity of ceria-zirconia prepared by flame spray pyrolysis under high temperature [J ] . Journal of Solid State Chemistry , 2021 , 300 : 122216 .
WANG L , SUN Y G , MA Y L , et al . Electron donation promotes the dual activation of lattice oxygen and molecular oxygen: The Pt-Pd/CeO 2 catalyst efficiently cata lyzes toluene [J ] . Journal of Catalysis , 2023 , 428 : 115133 .
BORONIN A I , SLAVINSKAYA E M , FIGUEROBA A , et al . CO oxidation activity of Pt/CeO 2 catalysts below 0 ℃: Platinum loading effects [J ] . Applied Catalysis B: Environmental , 2021 , 286 : 119931 .
PEREIRA-HERNÁNDEZ X I , DELARIVA A , MURAVEV V , et al . Tuning Pt-CeO 2 interactions by high-temperature vapor-phase synthesis for improved reducibility of lattice oxygen [J ] . Nature Communications , 2019 , 10 : 1358 .
CHEN K , WAN J , WANG T , et al . Constructi on of bimetallic Pt-Pd/CeO 2 -ZrO 2 -La 2 O 3 catalysts with different Pt/Pd ratios and its structure-activity correlations for three-way catalytic performance [J ] . Journal of Rare Earths , 2023 , 41 ( 6 ): 896 - 904 .
ZAGAYNOV I V , LIBERMAN E Y , NAUMKIN A V . Influence of Pt/Pd state on ceria-based support in CO oxidation [J ] . Journal of Rare Earths , 2023 , 41 ( 12 ): 1963 - 1968 .
LAN L , CHEN S H , WANG S N , et al . Synthesis of an advanced Pd-Rh bimetallic catalyst for gasoline engine emission control [J ] . Arabian Journal of Chemistry , 2022 , 15 ( 2 ): 103587 .
HAN X X , ZHANG L L , ZHANG R , et al . Boosting the catalytic performance of Al 2 O 3 -supported Pd catalysts by introducing CeO 2 promoters [J ] . Dalton Transactions , 2024 , 53 ( 7 ): 3290 - 3295 .
PASTOR-PÉREZ L , RAMOS-FERNÁNDEZ E V , SEPÚLVEDA-ESCRIBANO A . Effect of the CeO 2 synthesis method on the behaviour of Pt/CeO 2 catalysis for the water-gas shift reaction [J ] . International Journal of Hydrogen Energy , 2019 , 44 ( 39 ): 21837 - 21846 .
KANG R N , MA P D , HE J Y , et al . Transient behavior and reaction mechanism of CO catalytic ignition over a CuO-CeO 2 mixed oxide [J ] . Proceedings of the Combustion Institute , 2021 , 38 ( 4 ): 6493 - 6501 .
JIN C , SI W Z , CHEN Y , et al . Enhancing CO catalytic oxidation performance over Cu-doping manganese oxide octahedral molecular sieves catalyst [J ] . Journal of Colloid and Interface Science , 2024 , 663 : 541 - 553 .
田旭东 . Pt基分子筛材料用于CO催化氧化研究 [D ] . 合肥 : 中国科学技术大学 , 2023 .
TIAN X D . The study of CO catalytic oxidation over Pt based zeolites [D ] . Hefei : University of Science of Technology of China , 2023 .
SHAO W P , ZHANG Y , ZHOU Z W , et al . Dynamic control and quantification of active sites on ceria for CO activation and hydrogenation [J ] . Nature Communications , 2024 , 15 ( 1 ): 9620 .
MURAVEV V , SPEZZATI G , SU Y Q , et al . Interface dynamics of Pd-CeO 2 single-atom catalysts during CO oxidation [J ] . Nature Catalysis , 2021 , 4 ( 6 ): 469 - 478 .
TANG T , YE L M , CHEN Y R , et al . Diving into the interface-mediated Mars-van Krevelen (M-vK) characteristic of CuO x -supported CeO 2 catalysts [J ] . Applied Catalysis B: Environmental , 2024 , 342 : 123368 .
GU H , YOKOYA T , KANG L Q , et al . Oxygen vacancy formation as the rate-determining step in the Mars-van Krevelen mechanism [J/OL ] . ChemRxiv : 1 - 16 [ 2025-03-19 ] . DOI: 10.26434/chemrxiv-2024-nbzhr http://dx.doi.org/10.26434/chemrxiv-2024-nbzhr .
GE S S , CHEN Y F , GUO Y , et al . Mechanochemically activated Au/CeO 2 for enhanced CO oxidation and COPrO x reaction [J ] . Applied Materials Today , 2023 , 33 : 101857 .
PENTYALA P , DESHPANDE P A . CO oxidation over Ce 1- x Pd x O 2- δ takes place via vacancy hopping [J ] . Industrial & Engineering Chemistry Research , 2019 , 58 ( 19 ): 7964 - 7972 .
WANG Y , WANG F G , HAN K H , et al . Ultra-small CeO 2 nanoparticles supported on SiO 2 for indoor formaldehyde oxidation at low temperature [J ] . Catalysis Science & Technology , 2020 , 10 ( 19 ): 6701 - 6712 .
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