Size‐Controllable High‐Entropy Alloys Toward Stable Hydrogen Production at Industrial‐Scale Current Densities

Abstract Efficient and stable electrocatalytic hydrogen evolution reaction (HER) at high current densities is highly desirable for industrial‐scale hydrogen production, which is yet challenging, because of the electrocatalyst with short lifespans during the acidic HER process. Here, a controllable preparation technique is successfully developed to synthesize PdPtRuRhAu high‐entropy alloys (HEAs) of various sizes, within the 3.14 nm particles (HEA‐3.14) demonstrating exceptional catalytic performance and stable hydrogen production at current densities of −500 and −1000 mA·cm −2 with negligible activity loss over 100 h. Theoretical calculations indicate that the bridge adsorption site of Pd–Au serves as an ideal…

• NN
  National Natural Science Foundation of China

  Awards: 22178072, 22308063