Guang Li, Shu-Hu Yin, Li-Fei Ji, Xu-Yuan Nie, Ting Zhu, Xiao-Yang Cheng, Jun Xu, Rui Huang, Yan-Xia Jiang, Bin-Wei Zhang, Shi-Gang Sun. "Universal electrochemical quantification of active site density in transition metal nitrogen carbon electrocatalysts." Nature Communications (2025). https://doi.org/10.1038/s41467-025-65614-1