A superior catalytic system for oxygen evolution reaction (OER) is developed utilizing a sulfur doping strategy to boost the intrinsic catalytic property of crystalline nickel-cobalt oxide. By varying the sulfur doping duration, the sulfur doping ratios can be altered, the morphology changed from nanorod to nanosheet, the defect oxygen density may be varied, and the electronic state can be modulated. The electronic state modification is identified to be predominant, while morphology and defect oxygen changes contribute to the promoted OER performance to certain degree. The S-NiCoO_x-5 h sample possesses an optimum density of state near the Fermi level and the enlarged electrochemical active surface area, endowing a superior OER performance as indicated by the satisfactory 221 mV of overpotential required at 10 mA/cm². After integration with our earlier-developed HER-active NiCo-based phosphate catalyst, a remarkable 1.61 V is obtained to drive the overall water splitting to reach 10 mA/cm² in 1 M KOH. This work highlights the promotion effect of S incorporation for OER and offers a robust and efficient catalytic system for practical hydrogen production through water electrolysis.

利用硫掺杂策略开发了一种用于氧释放反应（OER）的高级催化体系，以增强结晶镍-钴氧化物的固有催化性能。通过改变硫的掺杂持续时间，可以改变硫的掺杂比例，从纳米棒到纳米片改变形态，可以改变缺陷氧密度，并且可以调节电子态。电子状态的修饰被认为是主要的，而形态和缺陷氧的变化在一定程度上有助于提高OER性能。S-NiCoO _x-5 h样品在费米能级附近具有最佳的状态密度，并具有扩大的电化学活性表面积，具有出色的OER性能，如在10 mA / cm ^2时所需的221 mV令人满意的过电位所表明。与我们先前开发的基于HER活性的NiCo基磷酸酯催化剂结合后，获得了惊人的1.61 V电压，以驱动总水分解在1 M KOH中达到10 mA / cm ²。这项工作突出了S掺入对OER的促进作用，并为通过水电解生产实际氢气提供了强大而有效的催化体系。