Production of hydrogen (H₂) and oxygen (O₂) through electrocatalytic water splitting is one of the sustainable, green and pivotal ways to accomplish the ever-increasing demands for renewable energy sources, but remains a big challenge because of the uphill reaction during overall water splitting. Herein, we develop high-performance non-noble metal electrocatalysts for pH-universal water splitting, based on nickel/vanadium boride (NiVB) nanoparticles/reduced graphene oxide (rGO) hybrid (NiVB/rGO) through a facile chemical reduction approach under ambient condition. By virtue of more exposure to surface active sites, superior electron transfer capability and strong electronic coupling, the as-prepared NiVB/rGO heterostructure needs pretty low overpotentials of 267 and 151 mV to deliver a current density of 10 mA cm⁻² for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) respectively, with the corresponding Tafel slope of 44 and 88 mV dec⁻¹ in 1.0 M KOH. Moreover, the NiVB/rGO electrocatalysts display a promising performance in a wide-pH conditions that require low overpotential of 310, 353 and 489 mV to drive a current density of 10 mA cm⁻² for OER under 0.5 M KOH, 0. 05 M H₂SO₄ and 1.0 M phosphate buffer solution (PBS) respectively, confirming the excellent electrocatalytic performance among state-of-the-art Ni-based electrocatalysts for overall water splitting. Therefore, the interfacial tuning based on incorporation of active heterostructure may pave a new route to develop bifunctional, cost-effective and efficient electrocatalyst systems for water splitting and H₂ production.

产生氢气（H ₂）和氧气（O ₂）通过电催化水分解是满足对可再生能源不断增长的需求的可持续，绿色和关键方法之一，但由于在整体水分解过程中会发生上坡反应，因此仍然是一个巨大的挑战。在此，我们通过在环境下采用简便的化学还原方法，基于镍/硼化硼（NiVB）纳米粒子/还原氧化石墨烯（rGO）杂化体（NiVB / rGO），开发了用于pH通用水分解的高性能非贵金属电催化剂。健康）状况。通过更多地暴露于表面活性部位，出色的电子传递能力和强大的电子耦合，所制备的NiVB / rGO异质结构需要267和151 mV的相当低的过电势才能提供10 mA cm ^-2的电流密度分别用于氧释放反应（OER）和氢释放反应（HER），在1.0 M KOH中的Tafel斜率分别为44和88 mV dec ^-1。此外，NiVB / rGO电催化剂在宽pH条件下表现出令人鼓舞的性能，要求在310 M ，353和489 mV的低过电势下，在0.5 M KOH，0。05 MH下驱动OER的电流密度为10 mA cm ^-2。₂ SO ₄和1.0 M磷酸盐缓冲溶液（PBS），分别证实了用于整体水分解的最新型镍基电催化剂具有出色的电催化性能。因此，基于掺入活性异质结构的界面调节可为开发用于水分解和H ₂生产的双功能，经济高效的高效电催化剂系统铺平一条新途径。