overall water splitting
Recently Published Documents





2022 ◽  
Vol 162 ◽  
pp. 106379
Zhongxin Duan ◽  
Hengqi Liu ◽  
Xiaojie Tan ◽  
Ahmad Umar ◽  
Xiang Wu

ACS Nano ◽  
2022 ◽  
Sangmin Jeong ◽  
Hien Duy Mai ◽  
Ki-Hun Nam ◽  
Cheol-Min Park ◽  
Ki-Joon Jeon

2022 ◽  
Yang Bai ◽  
Chao Li ◽  
Lunjie Liu ◽  
Yuichi Yamaguchi ◽  
Bahri Mounib ◽  

The production of hydrogen from water via solar water splitting is a potential method to overcome the intermittency of the Sun’s energy by storing it as a chemical fuel. Inorganic semiconductors have been studied extensively as photocatalysts for overall water splitting, but polymer photocatalysts are also receiving growing attention. So far, most studies involving organic polymers report hydrogen production with sacrificial electron donors, which is unsuitable for large-scale hydrogen energy production. Here we show that a linear conjugated polymer photocatalyst can be used for overall water splitting to produce stoichiometric amounts of H2 and O2. We studied a range of different metal co-catalysts in conjunction with the linear polymer photocatalyst, the homopolymer of dibenzo[b,d]thiophene sulfone (P10). Photocatalytic activity was observed for palladium/iridium oxide-loaded P10, while other co-catalysts resulted in materials that showed no activity for overall water splitting. The reaction conditions were further optimized and the overall water splitting using the IrO2-loaded P10 was found to proceed steadily for an extended period (>60 hours) after the system stabilized. These results demonstrate that conjugated polymers can act as single component photocatalytic systems for overall water splitting when loaded with suitable co-catalysts, albeit currently with low activities. Significantly, though, organic polymers can be designed to absorb a large fraction of the visible spectrum, which can be challenging with inorganic catalysts. Transient spectroscopy shows that the IrO2 co-catalyst plays an important role in the generation of the charge separated state required for water splitting, with evidence for fast hole transfer to the co-catalyst. This solid-state approach should be transferable to other polymer photocatalysts, allowing this field to move away from sacrificial hydrogen production towards overall water splitting.

Sign in / Sign up

Export Citation Format

Share Document