Preparation method of ruthenium@ruthenium dioxide core-shell nanospheres containing tensile strain for acidic oxygen production electrocatalyst

The invention relates to a preparation method of ruthenium@ruthenium dioxide core-shell nanospheres containing tensile strain for an acidic oxygen production electrocatalyst. Ruthenium dioxide powderis placed in ultrapure water to be subjected to ultrasonic dispersion to obtain turbid liquid without sediment; the turbid liquid is continuously stirred at room temperature, and the turbid liquid isirradiated by using nanosecond parallel pulse laser to obtain a black solution; the black solution is placed in a refrigerator to be frozen into a solid, then the frozen solid is placed in a freeze dryer to be freeze-dried, and the ruthenium@ruthenium dioxide core-shell nanospheres containing strain are obtained. According to the prepared sample, the overpotential at 10 mA cm <-2 > is only 191 mVand is reduced by 100 mV or above compared with commercial ruthenium dioxide, and the ruthenium@ruthenium dioxide core-shell nanospheres are a ruthenium-based catalyst which is optimal in performanceat present and does not introduce other atoms. The preparation method is simple in process, convenient to operate and easy to control, and a useful way is provided for designing and synthesizing an efficient electrocatalyst.