Photocatalytic hydrogen(H_(2))production via water splitting in the absence of sacrificial agents is a promising strategy for producing clean and sustainable hydrogen energy from solar energy.However,the realization o...Photocatalytic hydrogen(H_(2))production via water splitting in the absence of sacrificial agents is a promising strategy for producing clean and sustainable hydrogen energy from solar energy.However,the realization of a photocatalytic pure water splitting system with desirable efficiency is still a huge challenge.Herein,visible light photocatalytic H_(2) production from pure water splitting was successfully achieved using a g-C_(3)N_(4)/CoTiO_(3) S-scheme heterojunction photocatalyst in the absence of sacrificial agents.An optimum hydrogen evolution rate of 118μmol∙h^(−1)∙g^(−1) was reached with the addition of 1.5 wt%CoTiO_(3).The remarkably promoted hydrogen evolution rate was attributed to the intensified light absorption coupled with the synergistic effect of visible light responsive CoTiO_(3),the promoted efficiency in charge separation,and the reserved strong redox capacity induced by the S-scheme charge transfer mechanism.This work provides an alternative to visible light-responding oxidation photocatalysts for the construction of S-scheme heterojunctions and high-efficiency photocatalytic systems for pure water splitting.展开更多
文摘Photocatalytic hydrogen(H_(2))production via water splitting in the absence of sacrificial agents is a promising strategy for producing clean and sustainable hydrogen energy from solar energy.However,the realization of a photocatalytic pure water splitting system with desirable efficiency is still a huge challenge.Herein,visible light photocatalytic H_(2) production from pure water splitting was successfully achieved using a g-C_(3)N_(4)/CoTiO_(3) S-scheme heterojunction photocatalyst in the absence of sacrificial agents.An optimum hydrogen evolution rate of 118μmol∙h^(−1)∙g^(−1) was reached with the addition of 1.5 wt%CoTiO_(3).The remarkably promoted hydrogen evolution rate was attributed to the intensified light absorption coupled with the synergistic effect of visible light responsive CoTiO_(3),the promoted efficiency in charge separation,and the reserved strong redox capacity induced by the S-scheme charge transfer mechanism.This work provides an alternative to visible light-responding oxidation photocatalysts for the construction of S-scheme heterojunctions and high-efficiency photocatalytic systems for pure water splitting.
