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Single-Atom-Thick Active Layers Realized in Nanolaminated Ti3(AlCu1-)C2 and Its Artificial Enzyme Behavior
Youbing Li1,2, Mian Li1, Jun Lu3
1Engineering Laboratory of Advanced Energy Materials, Ningbo Institute of Materials Technology and Engineering , Chinese Academy of Sciences , Ningbo , Zhejiang 315201 , China.
Abstract:
A Ti3(AlCu1-)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(AlCu1-)C2 MAX phase provide actives sites for catalysis chemistry. As-synthesized Ti3(AlCu1-)C2 presents unusual peroxidase-like catalytic activity similar to that of natural enzymes. A fabricated Ti3(AlCu1-)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.
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