Compositional variations in highly active PtSn/Al₂O₃ catalysts derived from molecular complexes

Xu, Chaokai1; Tan, Shengdong1; Tang, Yaxin1,2,3; Xi, Shibo4; Yao, Bingqing1; Wade, Austin5; Zhao, Binbin1; Lu, Shangchen1; Du, Yankun1; Tian, Mingjiao1,6; He, Chi6; Ma, Lu7; Fu, Xingjie8; Shi, Jiwei8; Lu, Jiong8,9; Dai, Sheng10,11; Luo, Guangfu2,3; He, Qian1,9

2024-02-01

10.1016/j.apcatb.2023.123285

APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY   Impact Factor & Quartile

0926-3373

1873-3883

We investigated the industrially important PtSn/Al2O3 catalysts prepared with uniform particle sizes (similar to 1 nm) and varied compositions using molecular complexes of Pt(II) and Sn(II). Our best catalyst, with a Sn:Pt ratio of around 2, exhibited a high initial propylene productivity of about 1.1 mol C3H6 (g catalyst)(-1) h(-1). Elaborate electron microscopy studies revealed significant compositional variations in the catalyst, highlighting the practical challenges in achieving or confirming the theoretically predicted optimum Sn:Pt ratio. It is also found that the catalytic activities correlate well with the Pt dispersion, suggesting the structure-insensitive nature of the dehydrogenation reaction applies to these ultrasmall Pt-Sn nanoparticles. The presence of Pt-rich particles in the catalysts did not produce noticeable degradations in the reaction selectivity, indicating a wide composition range for Pt-Sn nanoparticles to be effective at the 1 nm size range. These findings emphasize the importance of detailed analysis of compositional distributions for understanding and optimizing nanoalloys.

Nanoalloys Compositional analysis Propane dehydrogenation Electron microscopy

SCI

English

Corresponding

Introduced Innovative R&D Team of Guangdong[NRF-NRFF11-2019-0002] ; Shenzhen Science and Technology Innovation Commission[2019B030301001] ; National Foundation of Natural Science, China[2017ZT07C062] ; Science and Technology Commission of Shanghai Municipality[JCYJ20200109141412308] ; Shanghai Rising-Star Program[52273226] ; Fundamental Research Funds for the Central Universities[22ZR1415700] ; Agency for Science, Technology and Research (A*STAR) under its MTC IRG Grant[20QA1402400] ; null[M22K2c0082]

Chemistry ; Engineering

Chemistry, Physical ; Engineering, Environmental ; Engineering, Chemical

WOS:001085045200001

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1.Natl Univ Singapore, Coll Design & Engn, Dept Mat Sci & Engn, 9 Engn Dr 1, EA 03-09, Singapore 117575, Singapore
2.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China
3.Southern Univ Sci & Technol, Guangdong Prov Key Lab Computat Sci & Mat Design, Shenzhen 518055, Guangdong, Peoples R China
4.Agcy Sci Technol & Res Singapore A STAR, Inst Sustainabil Chem Energy & Environm ISCE2, 1 Pesek Rd, Singapore 627833, Singapore
5.Thermo Fisher Sci, 5350 NW Dawson Creek Dr, Hillsboro, OR USA
6.Xi An Jiao Tong Univ, Sch Energy & Power Engn, State Key Lab Multiphase Flow Power Engn, Xian 710049, Shaanxi, Peoples R China
7.Brookhaven Natl Lab, Natl Synchrotron Light Source II NSL II, Upton, NY 11973 USA
8.Natl Univ Singapore, Dept Chem, 12 Sci Dr 2, Singapore 117549, Singapore
9.Natl Univ Singapore, Ctr Hydrogen Innovat, E8,1 Engn Dr 3, Singapore 117580, Singapore
10.East China Univ Sci & Technol, Sch Chem & Mol Engn, Key Lab Adv Mat, Shanghai 200237, Peoples R China
11.East China Univ Sci & Technol, Sch Chem & Mol Engn, Joint Int Res Lab Precis Chem & Mol Engn, Shanghai 200237, Peoples R China

Xu, Chaokai,Tan, Shengdong,Tang, Yaxin,et al. Compositional variations in highly active PtSn/Al₂O₃ catalysts derived from molecular complexes[J]. APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY,2024,341.

Xu, Chaokai.,Tan, Shengdong.,Tang, Yaxin.,Xi, Shibo.,Yao, Bingqing.,...&He, Qian.(2024).Compositional variations in highly active PtSn/Al₂O₃ catalysts derived from molecular complexes.APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY,341.

Xu, Chaokai,et al."Compositional variations in highly active PtSn/Al₂O₃ catalysts derived from molecular complexes".APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY 341(2024).