The exploration of low-cost and efficient bifunctional electrocatalysts for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) through tuning the chemical composition is strongly required for sustainable resources. Herein, we developed a bimetallic cobalt-manganese sulfide supported on Ni foam (CMS/Ni) via a solvothermal method. It has discovered that after combining with the pure Co₉S₈ and MnS, the morphologies of CMS/Ni have modulated. The obtained three-dimensionally hexagram-like CMS/Ni nanosheets has a significant increase of electrochemical active surface area and charge transport ability. More than that, the synergetic effect of Co and Mn has also presented in this composite. Benefiting from these, the CMS/Ni electrode shows great performance toward hydrogen evolution reaction and oxygen evolution reaction in basic medium, comparing favorably to that of the pure Co₉S₈/Ni and MnS/Ni. More importantly, this versatile CMS/Ni can catalyze the water splitting in a two-electrode system at a potential of 1.47 V, and this electrolyzer can be efficiently driven by a 1.50 V commercial dry battery.

可持续资源强烈要求通过调节化学组成来探索用于氧释放反应（OER）和氢释放反应（HER）的低成本高效双功能电催化剂。本文中，我们通过溶剂热法开发了一种负载在泡沫镍（CMS / Ni）上的双金属钴锰硫化物。发现与纯Co ₉ S ₈结合后和MnS，CMS / Ni的形态已被调制。所获得的三维六边形状CMS / Ni纳米片具有显着增加的电化学活性表面积和电荷传输能力。不仅如此，这种复合材料还具有Co和Mn的协同作用。得益于这些，CMS / Ni电极在碱性介质中对氢析出反应和氧析出反应表现出出色的性能，优于纯Co ₉ S ₈ / Ni和MnS / Ni。更重要的是，这种多功能的CMS / Ni可以在1.47 V的电势下催化两电极系统中的水分解，并且该电解槽可以由1.50 V的商用干电池有效地驱动。