CeO2 nanowires self-inserted into porous Co3O4 frameworks as high-performance “noble metal free” hetero-catalysts† †Electronic supplementary information (ESI) available: XRD data of pure CeO2 nanowires; TG curve of CeO2–ZIF-67-2 precursor; XPS and N

CeO2 nanowires self-inserted into porous Co3O4 frameworks as high-performance “noble metal free” hetero-catalysts† †Electronic supplementary information (ESI) available: XRD data of pure CeO2 nanowires; TG curve of CeO2–ZIF-67-2 precursor; XPS and N