Compositional Phase Control in High-Entropy Alloy Electrocatalysts.

ABSTRACT: High-entropy alloys (HEAs) provide uniquely tunable structural and electronic properties that enable robust electrocatalysis. While compositional manipulation of HEAs is well-known, systematically controlling the crystalline phase and morphology remains a challenge that could provide new avenues for controlling reactive sites and physical properties. Here, we show the preferential stabilization of mixed fcc/bcc to fcc phases by controlling the Au content in quinary AuPdFeCoNi HEA nanoparticles. This systematic structural and compositional control, when investigated with an ensemble of electronic, X-ray synchrotron, and surface techniques, allows us to identify the critical short- (few-Å) and medium- (6-10 Å) range structural motifs that deliver exceptional hydrogen evolution reaction (HER)

SUBMITTER: Jeong S 

PROVIDER: S-EPMC12903856 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature