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Engineering Pt1-Al2O3 enhances catalytic performance of naphtha reforming
  • +11
  • Panpan Li,
  • Yanpeng Yang,
  • Denglei Gao,
  • Fei Lu,
  • Ding Yi,
  • Bo Zhou,
  • Shoujie Liu,
  • Ji Nie,
  • Mingzhe Li,
  • Yuting Du,
  • Yong Xu,
  • Sha Li,
  • Xi Wang,
  • Jiannian Yao
Panpan Li
Beijing Jiaotong University
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Yanpeng Yang
Sinopec Research Institute of Petroleum Processing (RIPP, SINOPEC), Beijing 100083, P. R. China
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Denglei Gao
Beijing Jiaotong University
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Fei Lu
Beijing Jiaotong University
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Ding Yi
Beijing Jiaotong University
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Bo Zhou
Chemistry and Chemical Engineering Guangdong Laboratory
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Shoujie Liu
Chemistry and Chemical Engineering Guangdong Laboratory
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Ji Nie
Sinopec Research Institute of Petroleum Processing (RIPP, SINOPEC), Beijing 100083, P. R. China
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Mingzhe Li
Sinopec Research Institute of Petroleum Processing (RIPP, SINOPEC), Beijing 100083, P. R. China
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Yong Xu
Chemistry and Chemical Engineering Guangdong Laboratory
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Sha Li
Chemistry and Chemical Engineering Guangdong Laboratory
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Xi Wang
Beijing Jiaotong University

Corresponding Author:[email protected]

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Jiannian Yao
Institute of Chemistry Chinese Academy of Sciences
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Abstract

Pt nanoparticle with high Pt-Pt coordination number and degenerate d orbitals, has a strong affinity to naphtha and relevant intermediates, leading to severe carbon deposition and catalyst deactivation during naphtha reforming. The catalytic performance of Pt catalyst could be finely tuned by tailoring its d-electron structure. Herein, we propose a straightforward chlorinating strategy to transform PtOx nanoparticle into Pt single atoms with a specific Cl-Pt-O coordination. The adsorption of benzene on Pt is weakened with the Cl-Pt-O coordination, which facilitates aromatics desorption and hampers carbon deposition. Density functional theory (DFT) calculation indicates that the z-axis of Pt 5d orbitals is occupied and selectively exposes xy-plane orbital (dxy and dx2-y2), which weakens d-π hybridization between Pt 5d orbitals and π orbital of benzene ring. The d-electron regulation through chlorinating is a readily scalable strategy to synthesis single atom catalysts, and optimize naphtha reforming catalytic performance.