fig4

Figure 4. High-throughput synthesis and intrinsic activity evaluation of model catalysts. (A) Precursor printing and ultrahigh-temperature pulsed heating for the preparation of micrometer-scale HEA model catalyst arrays. This figure is reproduced with permission from reference^[27] Copyright © 2024 American Chemical Society; (B) High-throughput electrochemical screening of catalyst arrays using SECCM. This figure is adapted with permission from reference^[26] (Figure 2) © 2024 Wiley-VCH GmbH; (C) Intrinsic activity evaluation method based on j_relative. This figure is adapted with permission from reference^[26] (Supplementary Figures 13 and 18A) © 2024 Wiley-VCH GmbH; (D) Discovery workflow for HEA-HER catalysts integrating model catalyst array fabrication, intrinsic activity screening, and data prediction. This figure is reproduced with permission from reference^[27] Copyright © 2024 American Chemical Society. CE: Counter electrode; RE: reference electrode; WE: working electrode; HEA: high-entropy alloy; ECSA: electrochemcial active surface area; SECCM: scanning electrochemical cell microscopy; EML: ensemble machine learning; HER: hydrogen evolution reaction; RHE: reversible hydrogen electrode.