First-Principles Active-Site Model Design for High-Entropy-Alloy Catalyst Screening: The Impact of Host Element Selection on Catalytic Properties

• Active-site models comprise miniature active sites on the host element, providing one of effective descriptors for screening high-entropy-alloy (HEA) catalysts using machine learning. This study investigates the impact of host elements on the electronic properties of active sites via density functional theory (DFT), where the active-site model is used in the HEA electrocatalysts. Also, the appropriate host element selection significantly affects the systems surface structures, electronic, and catalytic properties that adsorbate adsorption energy, d-band center, Bader charge, Zero-point energy, and entropy are used as accuracy verification parameters compared to the original surface. Ultimately, the novel guideline for active-site model construction is proposed using the simple example of PtPdFeCoNi high-entropy alloys. This investigation demonstrates that the host element selection is a crucial parameter to the active-site models, influencing the electronic structure and electrocatalytic properties.

Ämnesord

NATURVETENSKAP  -- Kemi -- Teoretisk kemi (hsv//swe)

NATURAL SCIENCES  -- Chemical Sciences -- Theoretical Chemistry (hsv//eng)

Nyckelord

active-site model; high-entropy alloy; density functional theory; host-element impact

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