Synthesis of Cu7S4 nanoparticles: Role of halide ions, calculation, and electrochemical properties

By means of experiments and calculations, we found that selective adsorption of Br− and Cl− onto specific crystal facets and slowing of the reaction rate by formation of Cu(I)-anion-BPEI complex leads to morphology changes of Cu7S4 nanoparticles, from spherical particles to vinelike nanofibers.230