 Highlights ultra-thin P and Fe co-dope-nese 2 nanosheets supported on modified Ni-foam are synthesized, which shows desirable bifunctional electro-catalytic hydrogen evolution reaction – or, slash-hydrazine oxidation reaction – Hertzor, performance in hydrazine-assisted water electrolysis and ZN-Hertz battery. The coexistence of P and Fe hetero-atoms induces an accelerated 2-bac-slash U2009-plus-bac-slash U2009-2 reaction mechanism with a two-step reprocess and a two-step Hertzor step. This article was authored by Hao Yu-wang, Lei Wang, Jin Tao-ren, and others.