Iridium free, acidic-stable, cost-effective, and efficient oxygen evolution reaction (OER) electrocatalyst is considered to be the bottleneck in the quest for sustainable energy production/storage devices. RuO₂ has been proved as a highly active and standard OER electrocatalyst with poor stability. Herein, we are successfully providing the facile approach to synthesize the mixed oxide composite of RuO₂ tailored with MoO₃. Fifty percent reduction of noble metal contents, two times enhanced activity and excellent durability as compared to pure homemade and commercial RuO₂ have been confirmed by numerous characterization techniques. Enhanced electrochemical performance of best mixed oxide composite is observed due to increasing number of oxygen vacancies, electronic distortion, lower oxidation state of noble metal, and reduced value of the Tafel slope. Furthermore, the best composite shows the 7-fold increase in electrochemical surface area, 3.2 times improvement in the bulk mass activity, and less value of overpotential.

无铱，耐酸稳定，具有成本效益且高效的放氧反应（OER）电催化剂被认为是寻求可持续能源生产/存储装置的瓶颈。已证明RuO ₂是高活性和稳定度较差的标准OER电催化剂。在本文中，我们成功地提供了一种简便的方法来合成MoO ₃定制的RuO ₂混合氧化物复合材料。与纯自制和商用RuO ₂相比，贵金属含量降低了50％，活性提高了两倍，耐久性出色许多表征技术已经证实了这一点。由于氧空位数量的增加，电子畸变，贵金属的较低氧化态和Tafel斜率值降低，可以观察到最佳混合氧化物复合材料的电化学性能得到增强。此外，最好的复合材料显示出电化学表面积增加了7倍，整体质量活性提高了3.2倍，并且过电势值更小。