Anion assisted completely reconfigured manganese oxides with optimal proton adsorption for boosting acidic hydrogen evolution reaction

•Anion assisted completely reconfigured MnOx electrocatalysts was prepared.•The optimal H+ adsorption can be achieved by anion-assisted complete reconfiguration.•Reconfiguration can enhance charge transport and intrinsic activity of the catalyst.•The R-S-MnOx-CC catalyst has excellent acidic HER performance in acidic media.