Gao Xiaoping, Sun Zhimin, Ran Jiaqi, Li Jufu, Zhang Jingyan, Gao Daqiang
Key Laboratory of Sensor and Sensing Technology, Gansu Academy of Sciences, Lanzhou, 730000, Gansu, China.
Lanzhou Resources and Environment Voc-tech College, Lanzhou, 730000, Gansu, China.
Sci Rep. 2020 Aug 7;10(1):13395. doi: 10.1038/s41598-020-70283-9.
Due to the multistep proton-coupled electron transfer, it remains a huge challenge to accelerate the kinetics of oxygen evolution reaction (OER). Here, we demonstrate that perovskite-type LaCrFeO nanoparticles can be used as highly active and stable OER electrocatalysts, where it shows a low overpotential of 390 mV at 10 mA/cm, a small Tafel slope of 114.4 mV/dec and excellent stability with slight current decrease after 20 h, superior than that of their individual counterparts (LaFeO and LaCrO). This finding confirms that the present hybrid material would be an effective means to electrocatalyst for catalyzing OER.
由于多步质子耦合电子转移，加速析氧反应（OER）的动力学仍然是一个巨大的挑战。在这里，我们证明钙钛矿型LaCrFeO纳米颗粒可以用作高活性和稳定的OER电催化剂，在10 mA/cm²时显示出390 mV的低过电位，114.4 mV/dec的小塔菲尔斜率，并且在20小时后具有优异的稳定性，电流略有下降，优于其单独的对应物（LaFeO和LaCrO）。这一发现证实了这种混合材料将是催化OER的电催化剂的有效手段。
