Cyclic voltammetric studies of adsorption of cetyltrimethylammonium bromide and HBr on Pt(100) towards understanding their effects in shape-controlled synthesis of nanomaterials

•Adsorption of CTAB and HBr on Pt(100) was studied by cyclic voltammetry.•Both HBr and CTAB can prevent the long-range ordered structure of Pt(100) from perturbation by inhibiting oxygen adsorption, and the ability order is CTAB>HBr.•The irreversibly adsorbed CTAB on Pt(100) can be removed mostly by CO adsorption/stripping.