  A quantum pump in buckled graphene ribbon with armchair edges is discussed
numerically. By solving the Su-Schrieffer-Heeger model and performing the
computer simulation of quantum transport we find that a kink adiabatically
moving along the metallic ribbon results in highly-efficient pumping, with a
charge per kink transition close to the maximal value determined by the Fermi
velocity in graphene. Remarkably, insulating nanoribbon show the quantized
value of a charge per kink ($2e$) in relatively wide range of the system
parameters, providing a candidate for the quantum standard ampere. We attribute
it to the presence of a localized electronic state, moving together with a
kink, whose energy lies within the ribbon energy gap.
