Wang, Xia, et al. “Interfacial Covalent Bonds Regulated Electron-Deficient 2D Black Phosphorus for Electrocatalytic Oxygen Reactions.”https://doi.org/10.1002/adma.202008752__Advanced Materials, vol. 33, no. 20, 2021, p. 2008752, doi:https://doi.org/10.1002/adma.202008752.