Single-atom-thick active layers realized in nanolaminated Ti-3(AlxCu1-x)C-2 and its artificial enzyme behavior

  • Youbing Li
  • , Mian Li
  • , Jun Lu
  • , Baokai Ma
  • , Zhipan Wang
  • , Ling-Zhi Cheong
  • , Kan Luo
  • , Xianhu Zha
  • , Ke Chen
  • , Per O. A. Persson
  • , Lars Hultman
  • , Per Eklund
  • , Cai Shen
  • , Qigang Wang
  • , Jianming Xue
  • , Shiyu Du
  • , Zhengren Huang
  • , Zhifang Chai
  • , Qing Huang

Research output: Journal PublicationArticlepeer-review

Abstract

A Ti3(AlxCu1–x)C2 phase with Cu atoms with a degree of ordering in the A plane is synthesized through the A site replacement reaction in CuCl2 molten salt. The weakly bonded single-atom-thick Cu layers in a Ti3(AlxCu1–x)C2 MAX phase provide actives sites for catalysis chemistry. As-synthesized Ti3(AlxCu1–x)C2 presents unusual peroxidase-like catalytic activity similar to that of natural enzymes. A fabricated Ti3(AlxCu1–x)C2/chitosan/glassy carbon electrode biosensor prototype also exhibits a low detection limit in the electrochemical sensing of H2O2. These results have broad implications for property tailoring in a nanolaminated MAX phase by replacing the A site with late transition elements.
Original languageEnglish
Pages (from-to)9198−9205
Number of pages7
JournalACS Nano
Issue number13
DOIs
Publication statusPublished - 2019
Externally publishedYes

Keywords

  • nanolaminate
  • MAX phase
  • copper
  • catalysis
  • replacement reaction

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