Bimetallic single atom promoted α-MnO2 for enhanced catalytic oxidation of 5-hydroxymethylfurfural

Xuemei Liao, Mengdie Guo, Wei Tang, Changwen Liu, Wei Luo, Lei Tan, Tomohiro G. Noguchi, Miho Yamauchi, Yonghui Zhao, Xiaopeng Li

Research output: Contribution to journalArticlepeer-review

Abstract

We report a synergetic dual-metal single-atom (Pd and Ni) promoting approach that modulates the catalytic activity and selectivity of α-MnO2 toward HMF oxidation. Pd and Ni have different spatial doping profiles and catalytic functions. Pd single atoms are embedded in the crystalline lattice of α-MnO2, which activates lattice oxygen and creates abundant oxygen vacancies. Ni single atoms that are mainly anchored on the surface of α-MnO2 improve the ability to dissociate molecular oxygen for healing oxygen vacancies. Pd and Ni work synergistically to accelerate the consumption and recovery of active lattice oxygen during HMF oxidation, which results in 3 fold enhancement of productivity and near-unity DFF selectivity. Ex situ and in situ characterization together with theoretical calculations confirm the pronounced effects of Pd and Ni on oxygen species. Compared to conventional single atom catalysts requiring a metal loading of 1-10 wt%, a single atom promoter requiring a tiny metal loading <0.5

Original languageEnglish
Pages (from-to)8424-8433
Number of pages10
JournalGreen Chemistry
Volume24
Issue number21
DOIs
Publication statusPublished - Oct 17 2022

All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Pollution

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