由过渡金属硫化物组成的异质结催化剂在电催化水裂解方面表现出卓越的潜力。在本研究中，设计了一种FeS/Co₃S₄异质结电催化剂，用于碱性水/海水溶液中的析氢反应（HER）和析氧反应（OER）。生长在泡沫镍上的三维纳米阵列结构以及异质结的成功合成赋予了催化剂优异的活性。在碱性水/海水溶液中，HER的过电位（10 mA/cm²）分别为 120.3 和 135.6 mV，OER的过电位分别为 212 和 232 mV。这项工作为通过合成设计异质结实现高效电催化水/海水裂解提供了一种有效的方法。

Heterojunction catalysts composed of transition metal sulfides exhibited excellent potentials in electrocatalytic water splitting. Herein, we have designed a FeS/Co₃S₄ heterojunction catalyst for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in alkaline water/seawater solution. Three-dimensional nanoarrays were grown on nickel foam, and the successful synthesis of heterojunction endowed excellent activity to the catalyst. In alkaline water/seawater solution, the low overpotentials (at current density of 10 mA/cm²) of HER were 120.3 and 135.6 mV and the low overpotentials of OER were 212 and 232 mV, respectively. This work provided an effective method for highly-efficiently electrocatalytic splitting of water via fabrication of heterojunction.