) and productivity (P, mmol.h -1 .m -2 ) of CO2 adsorption on the electrodes (Figure and Table ). The adsorption rate used here is defined as the number of moles of CO2 adsorbed at the full sorption capacity over the time required to reach full sorption capacity, and the mass of the negative electrode. The adsorption rate followed the same sequence as gravimetric adsorption capacity, i.e., GR-AC > GP-AC > GS-AC > S-AC > Y-AC > BPL-AC. An approximately three-fold increase in adsorption rate was seen for GR-AC (83.6 μmol.kg -1 .s -1