In search of effective and stable bifunctional electrocatalyst for electrocatalytic water splitting is still a major challenge for the highly efficient H₂ production. Here, we reported a facile strategy to design high-indexed Cu₃Pd₁₃S₇ nanoparticles (NPs) in situ synthesized on the three-dimensional (3D) carbon nanofibers (CNFs) by combining electrospinning and chemical vapor deposition (CVD) technology. The high-index facets with abundant active sites, the 3D architecture CNFs with high specific surface area and synergistic effect of Cu–Pd–S bonds with strong electron couplings together promote the electrocatalytic performance. The Cu₃Pd₁₃S₇/CNFs shows excellent electrocatalytic activity with low overpotentials of 52 mV (10 mA cm⁻²) for hydrogen evolution reaction (HER) and 240 mV (10 mA cm⁻²) for oxygen evolution reaction (OER). The excellent protection of Cu₃Pd₁₃S₇ by CNFs from aggregation and electrolyte corrosion lead to the high stability of Cu₃Pd₁₃S₇/CNFs under acidic and alkaline conditions.

寻找有效和稳定的双功能电催化剂用于电催化水分解仍然是高效生产H ₂的主要挑战。在这里，我们报告了一种简便的策略，可通过结合静电纺丝和化学气相沉积（CVD）技术设计在三维（3D）碳纳米纤维（CNF）上原位合成的高指数Cu ₃ Pd ₁₃ S ₇纳米颗粒（NP）。具有丰富活性位点的高折射率面，具有高比表面积的3D结构CNF和具有强电子耦合作用的Cu-Pd-S键的协同效应共同促进了电催化性能。Cu ₃ Pd ₁₃ S ₇/ CNFs具有出色的电催化活性，对于氢释放反应（HER）具有52 mV（10 mA cm ^-2）的低超电势，对于氧释放反应（OER）具有240 mV（10 mA cm ^-2）的低电势。CNF对Cu ₃ Pd ₁₃ S ₇的极好的保护使其免于聚集和电解质腐蚀，从而使Cu ₃ Pd ₁₃ S ₇ / CNFs在酸性和碱性条件下具有很高的稳定性。