Widening Temperature Window for CO Preferential Oxidation in H-2 by Ir Nanoparticles Interaction with Framework Fe of Hexaaluminate

Hong, Bilv1; Liang, Jin-Xia2; Sun, Xiucheng3; Tian, Ming4; Huang, Fei1; Zheng, Ying1; Lin, Jian4; Li, Lin4; Zhou, Yanliang5; Wang, Xiaodong4

2021-05-07

10.1021/acscatal.1c01010

ACS Catalysis   影响因子和分区

2155-5435

It is important to develop an efficient noble-metal-based catalyst that has a wide work temperature window and good stability for CO preferential oxidation in H-2 (CO-PROX), a key step to purify industrial hydrogen resource. Herein, a catalyst of Fe-substituted hexaaluminate-supported Ir nanoparticles with a mean size of similar to 1.4 nm (Ir/BaFeAl11O19) is synthesized. It can exhibit total CO conversion for the CO-PROX reaction in an unprecedented temperature range from 20 to 200 degrees C, high stability, and good resistance to CO2 and H2O in a simulated practical atmosphere. Detailed characterizations coupled with density functional theory (DFT) calculations show that the interaction between Ir species and framework Fe cations in mirror planes of hexaaluminate promotes the formation of a certain amount (8%) of Fe2+ species for low-temperature CO oxidation, while the Ir species interacting with these Fe2+ provide moderate CO bond strength that is critical to maintaining the preferential oxidation of CO rather than H-2 at high temperatures.

temperature window iron species iridium hexaaluminate preferential oxidation of CO

SCI ; EI

英语

其他

National Natural Science Foundation of China[21808033,21878283,21763006,22022814] ; Education Department of Fujian Province of China[JT180088] ; Youth Innovation Promotion Association CAS[2017223] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB17020100] ; National Key Projects for Fundamental Research and Development of China[2016YFA0202801]

Chemistry

Chemistry, Physical

WOS:000649106200070

AMER CHEMICAL SOC

20212210427407

Aluminum compounds ; Atmospheric temperature ; Barium compounds ; Catalysts ; Density functional theory ; Energy resources ; Gas fuel purification ; Nanoparticles ; Oxidation ; Positive ions ; Precious metals ; Synthesis (chemical)

Atmospheric Properties:443.1 ; Gas Fuels:522 ; Energy Resources and Renewable Energy Issues:525.1 ; Precious Metals:547.1 ; Nanotechnology:761 ; Chemical Reactions:802.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Probability Theory:922.1 ; Solid State Physics:933

Web of Science

1.Fujian Normal Univ, Coll Chem & Mat Sci, Fujian Prov Key Lab Adv Mat Oriented Chem Engn, Fuzhou 350007, Fujian, Peoples R China
2.Southern Univ Sci & Technol, Dept Chem, Shenzhen 518055, Guangdong, Peoples R China
3.Zhejiang Univ Technol, Inst Ind Catalysis, Hangzhou 310032, Peoples R China
4.Chinese Acad Sci, Dalian Inst Chem Phys, CAS Key Lab Sci & Technol Appl Catalysis, Dalian 116023, Liaoning, Peoples R China
5.Fuzhou Univ, Natl Engn Res Ctr Chem Fertilizer Catalyst, Fuzhou 350002, Fujian, Peoples R China

Hong, Bilv,Liang, Jin-Xia,Sun, Xiucheng,et al. Widening Temperature Window for CO Preferential Oxidation in H-2 by Ir Nanoparticles Interaction with Framework Fe of Hexaaluminate[J]. ACS Catalysis,2021,11(9):5709-5717.

Hong, Bilv.,Liang, Jin-Xia.,Sun, Xiucheng.,Tian, Ming.,Huang, Fei.,...&Wang, Xiaodong.(2021).Widening Temperature Window for CO Preferential Oxidation in H-2 by Ir Nanoparticles Interaction with Framework Fe of Hexaaluminate.ACS Catalysis,11(9),5709-5717.

Hong, Bilv,et al."Widening Temperature Window for CO Preferential Oxidation in H-2 by Ir Nanoparticles Interaction with Framework Fe of Hexaaluminate".ACS Catalysis 11.9(2021):5709-5717.