Electrochemical Formation of a MnO 2 Nanoshield on Ru-Doped Mn 3 O 4 for Ultrastable Acidic Oxygen Evolution Catalysis - Haoqiang Song; Jingkun Yu; Mingjun Nie; Shaobo Cheng; Zhiyong Tang; Siyu Lu (Journal of the American Chemical Society, 2026)