Jingjing Zhang, Liangliang Xu, Song Guo,* Yifei Zhang, Yang Zhao, Gang Wu,* Gao Li*, Amorphous MnRuOx Containing Microcrystalline for Enhanced Acidic Oxygen-Evolution Activity and Stability. Angewandte Chemie International Edition 2024, 63, DOI: 10.1002/anie.202405641.