Bismuth modified gold nanoelectrode ensemble for stripping voltammetric determination of lead

► The modification of nanoelectrode ensemble (NEE) with Bi is performed. ► Bi-film NEE exhibits a wider potential window than the unmodified NEE. ► Both in situ and ex situ depositions of Bi are possible. ► Detection limit of 30 ng L− 1 for Pb(II) is achieved.