In situ doping Pt single atoms into 3D flower-like 1T-MoS2 via Pt-S bond for efficient hydrogen evolution reaction

被引：0

作者：

Li, Ziya ^{[1
]}

Zhang, Chao ^{[1
]}

Wang, Haipeng ^{[1
]}

Zhang, Delu ^{[1
]}

Zhuang, Tao ^{[2
]}

Lv, Zhiguo ^{[1
]}

机构：

[1] Qingdao Univ Sci & Technol, Sch Chem Engn, Qingdao 266042, Peoples R China

[2] Qingdao Univ Sci & Technol, Shandong Prov Key Lab Rubber Plast, Minist Educ, Qingdao 266042, Peoples R China

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2025年 / 689卷

关键词：

Pt single atoms; Molybdenum disulfide; Phase transition; Electrocatalytic hydrogen; MOS2; NANOSHEETS;

D O I：

10.1016/j.jcis.2025.137282

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Combining single atoms via phase transition engineering (from 2H to 1T) remains a challenge in MoS2-based catalysts. Herein, we report that Pt single atoms (PtSA) were doped into a 3D flower-like 1T-MoS2 catalyst (PtSA@MoS2) using a Pt-S bonding strategy. Doping with PtSA induced a phase transition in MoS2 from the 2H phase to the 1T phase. PtSA@MoS2 exhibited outstanding hydrogen evolution reaction (HER) performance, featuring an overpotential of 25 mV at 10 mA cm- 2, a Tafel slope of 43.6 mV dec-1, and excellent long-term stability. The Pt-S first-shell scattering of PtSA@MoS2 in extended X-ray absorption fine structure (EXAFS) directly indicated that the PtSA was anchored near S atoms, forming Pt-S bonds. Furthermore, S atoms proximal to Pt functioned as catalytically active sites for HER, with Pt acting as an electron transfer mediator, facilitating the electron transfer from Mo to Pt and then to S. The p-band center of S showed a positive shift, indicating that PtSA@MoS2 interacted weakly with hydrogen, thereby accelerating the desorption of H atoms to generate H2. Additionally, PtSA@MoS2 exhibited a Delta GH* of only-0.13 eV, which also favored H2 production.

引用

页数：8