Fabrication of an electrocatalyst with remarkable electrocatalytic activity for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is important for the production of hydrogen energy. In this study, Ni–Co–W alloy urchin-like nanostructures were fabricated by binder-free and cost-effective electrochemical deposition method at different applied current densities and HER and OER electrocatalytic activity was studied. The results of this study showed that the microstructure and morphology are strongly influenced by the electrochemical deposition parameters and the best electrocatalytic properties are obtained at the electrode created at the 20 mA.cm⁻²applied current density. The optimum electrode requires −66 mV and 264 mV, respectively, for OER and HER reactions for delivering the 10 mA cm⁻² current density. The optimum electrode also showed negligible potential change after 10 h electrolysis at 100 mA cm⁻², which means remarkable electrocatalytic stability. In addition, when this electrode used as a for full water splitting, it required only 1.58 V to create a current density of 10 mA cm⁻². Such excellent electrocatalytic activity and stability can be related to the high electrochemical active surface area, being binder-free, high intrinsic electrocatalytic activity and hydrophilicity. This study introduces a simple and cost-effective method for fabricating of effective electrodes with high electrocatalytic activity.

具有对氢气析出反应（HER）和氧气析出反应（OER）均具有显着电催化活性的电催化剂的制备对于产生氢能很重要。在这项研究中，采用无粘结剂且经济有效的电化学沉积方法，在不同的施加电流密度下，制备了Ni-Co-W合金的海胆状纳米结构，并研究了HER和OER的电催化活性。这项研究的结果表明，微观结构和形态受到电化学沉积参数的强烈影响，并且在施加20 mA.cm ^-2的施加电流密度的电极上获得了最佳的电催化性能。最佳电极分别需要-66 mV和264 mV的OER和HER反应才能产生10 mA cm^-2电流密度。最佳电极在100 mA cm ^{-2的条件下}电解10 h后的电势变化也可忽略不计，这意味着出色的电催化稳定性。另外，当该电极用作完全水分解的电极时，仅需要1.58 V即可产生10 mA cm ^-2的电流密度。如此优异的电催化活性和稳定性可以与高电化学活性表面积，无粘合剂，高固有电催化活性和亲水性有关。这项研究介绍了一种简单有效的方法来制造具有高电催化活性的有效电极。