1：Experimental Design and Method Selection:

The study employs a van der Waals layer-by-layer (lbl) epitaxial growth protocol for preparing MOF thin film on FTO glass. The 2-D layered MOF constructed from porphyrin ligand and zinc acetate (Zn-TCPP) was chosen. The Zn-TCPP thin film was then doped with Pt by immersing into K2PtCl4 solution and reduction treatment.

2：Sample Selection and Data Sources:

The samples used include Zn-TCPP thin film on FTO glass, which was then doped with Pt to form Zn-TCPP-Pt thin film.

3：List of Experimental Equipment and Materials:

Instruments and materials include FTO glass, Zn-TCPP thin film, K2PtCl4 aqueous solution, and reduction treatment setup.

4：Experimental Procedures and Operational Workflow:

The Zn-TCPP thin film was immersed into 0.01mM K2PtCl4 aqueous solution and heated at 80°C for 6 hours, followed by rinsing, drying, and reduction at 180°C for 60 minutes in a mixture atmosphere with 10% H2 in N

5：01mM K2PtCl4 aqueous solution and heated at 80°C for 6 hours, followed by rinsing, drying, and reduction at 180°C for 60 minutes in a mixture atmosphere with 10% H2 in NData Analysis Methods:

2. 5. Data Analysis Methods: The study uses XRD, UV-vis spectra, XPS, EXAFS, XANES, SEM, TEM, EDS, AFM, CV curves, EIS Nyquist plots, and Tafel polarization curves for characterization and analysis.