In this study, nanocomposites consisting of crystalline Ru and RuO₂ nanoparticles have been successfully synthesized via a hydrothermal method in the presence of urea followed by calcination. The effect of calcination temperatures on the formation of the Ru and RuO₂ nanocomposites are systemically investigated. Our experimental results have shown that the applied annealing temperature of 300 °C facilitated the formation of the nanostructured Ru and RuO₂ composite with a large surface area. Further, novel Ru-RuO₂ nanoparticle/activated carbon (Ru-RuO₂/AC) composites are prepared and tested as an advanced supercapacitor material for energy storage. Our experimental results reveal that the optimized composition of the Ru-RuO₂/AC nanocomposite consists of 10 wt.% of Ru-RuO₂ and 90 wt.% of AC, and that the specific capacitance of the developed nanocomposite is 1460 F g⁻¹ (in terms of Ru-RuO₂) at a current density of a 10 A g⁻¹ in a 0.5 M H₂SO₄ electrolyte, which is much higher than many other RuO₂ based binary composites reported in the literature. In addition, this new Ru-RuO₂/AC nanocomposite exhibits a high charging/discharging rate capability and excellent stability. An approximately 94% retention of the initial specific capacitance is achieved over 10,000 cycles at a charging/discharging current density of 50 A g⁻¹.

在这项研究中，由结晶Ru和RuO ₂纳米颗粒组成的纳米复合材料已经通过尿素存在下的水热方法成功地合成，然后进行了煅烧。系统地研究了煅烧温度对Ru和RuO ₂纳米复合材料形成的影响。我们的实验结果表明，施加的300°C的退火温度促进了具有大表面积的纳米结构Ru和RuO ₂复合材料的形成。此外，新型Ru-RuO ₂纳米颗粒/活性炭（Ru-RuO ₂/ AC）复合材料作为能量存储的高级超级电容器材料进行了制备和测试。我们的实验结果表明，在Ru-的RuO的优化组合物₂ / AC纳米复合材料由钌的RuO的10重量％。₂和AC的90重量％，并且该发达纳米复合材料的比电容为1460 F G。^-在0.5 M H ₂ SO ₄电解质中，电流密度为10 A g ^-1时，其电流密度为¹（以Ru-RuO _2计），这比文献中报道的许多其他基于RuO ₂的二元复合材料高得多。另外，这种新的Ru-RuO ₂/ AC纳米复合材料具有高充电/放电速率能力和出色的稳定性。在50 A g ^-1的充电/放电电流密度下，在10,000个循环中可以实现约94％的初始比电容保留。