Platinum (Pt) free micro/nanomotors (MNMs) using a low content of fuels are highly desired for many applications. Herein, we demonstrate that cathodic electrofabrication can produce modified MnO₂ based microtubes and microrods as highly efficient MNMs in hydrogen peroxide (H₂O₂) as low as 0.2%. The speed of graphene/Ag-MnO₂ micromotors could be smartly regulated using a surfactant and the maximum speed of an individual micromotor exceeds 1.3 mm s⁻¹ in 0.5% H₂O₂. The propelling force and output power of the micromotors are 3.4 and 10 times as high as those of the best Pt-based micromotors reported. These Ag-MnO₂ based micromotors are envisioned to be a great promise for practical applications from biomedical delivery to environmental decontamination.

对于许多应用，非常需要使用低燃料含量的无铂（Pt）微型/纳米电机（MNM）。在这里，我们证明阴极电加工可以生产改性的基于MnO ₂的微管和微棒，作为过氧化氢（H ₂ O ₂）中低至0.2％的高效MNM 。石墨烯/ Ag-MnO ₂微型电动机的速度可以使用表面活性剂进行智能调节，单个微型电动机的最大速度在0.5％H ₂ O _2中超过1.3 mm s ^-1。微型电动机的推进力和输出功率分别是报道的最佳基于Pt的微型电动机的3.4倍和10倍。这些Ag-MnO ₂ 可以预见，基于微电机的微电机有望在从生物医学输送到环境净化的实际应用中大有前途。