The development of efficient and low-cost bifunctional catalysts is crucial for large-scale electrochemical water splitting for hydrogen production. In this study, we designed a high-entropy amorphous alloy featuring intrinsic nanoscale phase separation and employed a dealloying strategy to construct a novel catalyst with an amorphous/crystalline heterostructure. This catalyst features a high density of active sites and enables directional charge transfer, thereby exhibiting outstanding overall water splitting performance.

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