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A General Strategy for Engineering Single-Metal Sites on 3D Porous N, P Co-Doped Ti 3 C 2 T X MXene.
- Source :
-
ACS nano [ACS Nano] 2022 Mar 22; Vol. 16 (3), pp. 4116-4125. Date of Electronic Publication: 2022 Feb 21. - Publication Year :
- 2022
-
Abstract
- Two-dimensional (2D) MXenes have been developed to stabilize single atoms via various methods, such as vacancy reduction and heteroatom-mediated interactions. However, anchoring single atoms on 3D porous MXenes to further increase catalytic active sites and thus construct electrocatalysts with high activity and stability remains unexplored. Here, we reported a general synthetic strategy for engineering single-metal sites on 3D porous N, P codoped Ti <subscript>3</subscript> C <subscript>2</subscript> T <subscript>X</subscript> nanosheets. Through a "gelation-and-pyrolysis" process, a series of atomically dispersed metal catalysts (Pt, Ir, Ru, Pd, and Au) supported by N, P codoped Ti <subscript>3</subscript> C <subscript>2</subscript> T <subscript>X</subscript> nanosheets with 3D porous structure can be obtained and serve as efficient catalysts for the electrochemical hydrogen evolution reaction (HER). As a result of the favorable electronic and geometric structure of N(O), P-coordinated metal atoms optimizing catalytic intermediates adsorption and 3D porous structure exposing the active surface sites and facilitating charge/mass transfer, the as-synthesized Pt SA-PNPM catalyst shows ∼20-fold higher activity than the commercial Pt/C catalyst for electrochemical HER over a wide pH range.
Details
- Language :
- English
- ISSN :
- 1936-086X
- Volume :
- 16
- Issue :
- 3
- Database :
- MEDLINE
- Journal :
- ACS nano
- Publication Type :
- Academic Journal
- Accession number :
- 35187929
- Full Text :
- https://doi.org/10.1021/acsnano.1c09841