Brønsted acid sites formation through penta-coordinated aluminum species on alumina-boria for phenylglyoxal conversion

Wenjie Yang, Kyung Duk Kim, Luke A. O'Dell, Lizhuo Wang, Haimei Xu, Mengtong Ruan, Wei Wang, Ryong Ryoo, Yijiao Jiang*, Jun Huang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Recently, Penta-coordinated Al (AlV) have attracted large attention and is promising for tailoring catalysts with the capability to form new BAS in specific mixed oxide. In this study, amorphous alumina-boria materials with enriched surface AlV were prepared as platforms for the formation of potential new BAS. With the aid of solid-state NMR, interacting species of AlV with three-coordinated boron have been identified in the highly distorted local structure with BAS forming potential (AlV-OH···BIII). The catalytic activity of the AlV-BAS has been tested by the phenylglyoxal conversion, where the functionality of AlV-BAS has been further verified by the in situ 1H NMR. Herein, the ssNMR observation demonstrates the first experimental visualization of a new type AlV-BAS in non-silica alumina materials present with predominance. The AlV-BAS is promising to serve as one new state-of-the-art strategy to improve acid catalytic performance in varied mixed oxides.

Original languageEnglish
Pages (from-to)375-386
Number of pages12
JournalJournal of Catalysis
Volume416
DOIs
Publication statusPublished - Dec 2022

Keywords

  • Solid state NMR
  • Penta-coordinated aluminum
  • Brønsted acid sites
  • Amorphous alumina-boria

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