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A General Strategy for Engineering Single-Metal Sites on 3D Porous N, P Co-Doped Ti<sub>3</sub>C<sub>2</sub>T<sub>X</sub> MXene

Wei PengCollege of Materials Science and Engineering  and  State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha, Hunan 410082, ChinaJiuhui HanAdvanced Institute for Materials Research, Tohoku University, Sendai 980-8577, JapanYing‐Rui LuNational Synchrotron Radiation Research Center, Hsinchu 300, TaiwanMin LuoDepartment of Electronic Science and Technology, School of Electronic Information Engineering, Wuxi University, Wuxi, Jiangsu 214105, ChinaTing‐Shan ChanNational Synchrotron Radiation Research Center, Hsinchu 300, TaiwanMing PengCollege of Materials Science and Engineering  and  State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha, Hunan 410082, ChinaYongwen TanCollege of Materials Science and Engineering  and  State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha, Hunan 410082, China
2022en
ABI

Annotatsiya

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 Ti3C2TX 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 Ti3C2TX 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.

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DOI
10.1021/acsnano.1c09841

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