S1 Hollow cobalt phosphide octahedral pre-catalysts with exceptionally high intrinsic catalytic activity for electro- oxidation of water and methanol Junyuan Xu, a Yuefeng Liu, b Junjie Li, a Isilda Amorim, a Bingsen Zhang, c Dehua Xiong, d Nan Zhang, a Sitaramanjaneva Mouli Thalluri, a Juliana P. S. Sousa a and Lifeng Liu a* a International Iberian Nanotechnology Laboratory (INL), Av. Mestre Jose Veiga, 4715-330 Braga, Portugal. b Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023, Dalian, China. c Shenyang National Laboratory for Materials Science and Institute of Metal Research, Chinese Academy of Sciences, 110016, Shenyang, China. d State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, 430070, Wuhan, China. Electronic Supplementary Material (ESI) for Journal of Materials Chemistry A. This journal is © The Royal Society of Chemistry 2018