Details

Autor(en) / Beteiligte

• Liu, Xingyan
• Song, Xueting
• Jiang, Guangmei
• Tao, Liujun
• Jin, Zhaoyu
• Li, Fukun
• He, Youzhou
• Dong, Fan

Titel

Pt Single-Atom collaborate with Pt Atom-Clusters by an In-Situ confined strategy for accelerating electrocatalytic hydrogen evolution

Ist Teil von

• Chemical engineering journal (Lausanne, Switzerland : 1996), 2024-02, Vol.481, p.148430, Article 148430

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2024

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• A novel PtM@CN electrocatalyst, where Pt single-atom and Pt atom-clusters are encapsulated in the N-C framework, exhibits high HER activity in acidic and alkaline electrolytes. [Display omitted] •A novel in-situ strategy to confine Pt single-atom and Pt atom-clusters.•Pt single-atom collaborate with Pt atom-clusters have great advantages for HER.•Catalysts exhibit excellent HER performance under acidic and alkaline conditions.•A new avenue has been opened for the study of metal size-related catalysis. Heterogeneous catalysts with atomic dispersion play an important role in electrocatalysis. In addition to the single-atom, modifying the intrinsic catalytic capacity of single-atom catalysts through cooperative atom-clusters is an effective way to increase active sites and improve mass activity. Herein, a composite electrocatalytic material (PtM@CN) with partial Pt single-atoms and partial Pt atom-clusters was obtained by pyrolysis of the thermostable UiO-66-PtTCPP precursor. Remarkably, beneficial to the synergistic effect of Pt single-atom and Pt atom-clusters as well as the strong metal-support interaction, the PtM@CN catalyst showed excellent hydrogen evolution reaction (HER) activity and stability in both acidic and alkaline electrolytes. Moreover, X-ray photoelectron spectroscopy (XPS) and density functional theory (DFT) calculations shows that the existence of Pt single-atom and Pt atom-clusters could rationally adjust electronic structure of supported metals and impact adsorption energy of reaction intermediates, which play an essential role in enhancing the electrocatalytic activity of HER.