From a practical point of view, the applied bias photoconversion efficiency (ABPE) is the most important and informative performance metric for water splitting photoanodes. As presented in Fig. , the maximum ABPE of 0.73% was determined for Mo-BiVO4/CoPOM photoanode at a potential of +0.86 V vs. RHE, which is an enhancement by the factor of 24 and 2.5 compared to pristine BiVO4 (~0.03% at +1.07 V vs. RHE) and Mo-BiVO4 (~0.29% at +0.98 V vs. RHE), respectively. Apart from the significant increase of the photoconversion efficiency upon the combined effect of doping with Mo and modification with CoPOM, the fact that the maximum power point is shifted to more negative bias potentials is particularly important in view of more feasible integration with photocathodes for hydrogen evolution in tandem solar-driven water splitting systems.