Developing earth-abundant and low-cost electrocatalysts for water splitting is important for the conversion systems of renewable and clean energy. Herein, under the guidance of theoretical calculations, a new type of skutterudite-type ternary cobalt nickel phosphide (Co_1–xNi_xP₃) nanoneedle arrays (NAs) is fabricated on carbon cloth for the splitting of water. The electronic structure was tuned by doping an appropriate amount of Ni, and the resultant Co_0.93Ni_0.07P₃ displayed good catalytic activity toward hydrogen evolution reaction (HER) with an overpotential (η₁₀) of 87 mV versus reversible hydrogen electrode (RHE) when the current density reaches −10 mA cm^–2 and the Tafel slope of the catalyst is 60.7 mV dec^–1 in alkaline electrolyte. In addition, the Co_0.93Ni_0.07P₃ also exhibited an OER activity (η₂₀ of 221 mV vs RHE and the Tafel slope of 83.7 mV dec^–1). These skutterudite-based Co_1–xNi_xP₃ electrocatalysts show promising potential in the applications of overall water splitting in an alkaline environment.

中文翻译：

---

Skutterudite型三元Co ₁ – _x Ni _x P ₃纳米针阵列电催化剂可增强氢气和氧气的释放

开发用于水分解的富地球和低成本的电催化剂对于可再生能源和清洁能源的转换系统很重要。在此，在理论计算的指导下，在碳布上制备了一种新型的方钴矿型三元磷化钴镍（Co _{1 – x} Ni _x P ₃）纳米针阵列（NAs），用于水的分解。该电子结构通过掺杂镍适量调谐，并将所得钴_0.93镍_0.07 P ₃显示良好的催化活性朝向析氢反应（HER）配有一个超电势（η ₁₀）与可逆氢电极（RHE）相比，当电流密度达到-10 mA cm ^–2且在碱性电解液中催化剂的Tafel斜率为60.7 mV dec ^–1时，）为87 mV 。此外，钴_0.93镍_0.07 P ₃也表现出OER活性（η ₂₀ 221毫伏VS RHE和83.7毫伏分解的塔菲尔斜率的^-1）。这些基于skutterudite的Co ₁ – _x Ni _x P ₃电催化剂在碱性环境中的整体水分解应用中显示出令人鼓舞的潜力。