biostudies-literatureFeng KNational Key R&D Program of ChinaKey-Area Research and Development Program of GuangDong ProvinceNational Natural Science Foundation of ChinaNational MCF Energy R&D Program of ChinaNatural Science Foundation of Jiangsu Provincee2203199https://www.ebi.ac.uk/biostudies/studies/S-EPMC9534975biostudies-literatureUnknown9(28)Positively charged Pt can work as the active center for hydrogen evolution reaction (HER) but the corresponding design of state-of-the-art electrocatalysts at high current densities has never been realized. Here the application of positively charged Pt in an effective Fe-PtNiPO nanoreactor for highly efficient and stable HER is demonstrated. Synchrotron radiation X-ray absorption spectroscopy confirms the formation of internal positively charged Pt and the in situ experiments reveal the quick charge transfer in the nanoreactor. Ni-based materials around Pt are used to tune the electronic structure and promote the water dissociation to form locally enriched H⁺ , while a porous Fe shell can both prevent the loss of active material and allow the efficient material transport. All thAdvanced science (Weinheim, Baden-Wurttemberg, Germany)Positively Charged Pt-Based Nanoreactor for Efficient and Stable Hydrogen Evolution.PMC95349752018YFE030610551821002BK201900412020YFA04061032020YFA04061042020YFA0406101520412022019B010933001U1932211217711325172520451972216Li SFeng KChen YKang ZZhong JXu JfalsePositively Charged Pt-Based Nanoreactor for Efficient and Stable Hydrogen Evolution.Positively charged Pt can work as the active center for hydrogen evolution reaction (HER) but the corresponding design of state-of-the-art electrocatalysts at high current densities has never been realized. Here the application of positively charged Pt in an effective Fe-PtNiPO nanoreactor for highly efficient and stable HER is demonstrated. Synchrotron radiation X-ray absorption spectroscopy confirms the formation of internal positively charged Pt and the in situ experiments reveal the quick charge transfer in the nanoreactor. Ni-based materials around Pt are used to tune the electronic structure and promote the water dissociation to form locally enriched H⁺ , while a porous Fe shell can both prevent the loss of active material and allow the efficient material transport. All th2022-01-01T00:00:00Z2022 Oct2025-04-21T16:48:11.735Z2025-04-05T11:38:36.574ZS-EPMC95349753594517310.1002/advs.202203199