Constructing a P2W18O626--Containing Hybrid Photocatalyst via Noncovalent Interactions for Enhanced H2 Production

Ruonan Li; Rui Chen; Linxia Tang; Qing Li; Yan-Xin Chen; Jinsheng Liao; Wei Wang

doi:10.1021/acsomega.4c01179

Constructing a P₂W₁₈O₆₂^6--Containing Hybrid Photocatalyst via Noncovalent Interactions for Enhanced H₂ Production

ACS Omega. 2024 Apr 9;9(16):18556-18565. doi: 10.1021/acsomega.4c01179. eCollection 2024 Apr 23.

Authors

Ruonan Li^{1

2

3

4}, Rui Chen^{2

3

4}, Linxia Tang^{2

3

4}, Qing Li^{2

3

4}, Yan-Xin Chen^{2

3

4}, Jinsheng Liao¹, Wei Wang^{2

3

4}

Affiliations

¹ School of Chemistry and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China.
² Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350108, Fujian, China.
³ Xiamen Institute of Rare-earth Materials, Haixi Institutes, Chinese Academy of Sciences, Xiamen 361021, Fujian, China.
⁴ Fujian College, University of Chinese Academy of Sciences, Fuzhou 350002, Fujian, China.

Abstract

Polyoxometalates (POMs) have gained significant research attention because of their excellent properties in photocatalytic (PC) hydrogen production. Exploring POM-based compounds for heterogeneous photocatalysis is an ongoing task. Here, we obtain a water-insoluble inorganic-organic hybrid compound, (P₂W₁₈O₆₂)₃(C₁₂N₃H₁₀)₆(C₁₂N₃H₁₁)₆·9.5H₂O (P-PW), formed by Dawson-type POM P₂W₁₈O₆₂^6- (P₂W₁₈) anions and protonated 2-(pyridin-4-yl)-1H-benzo[d]imidazole (PHB) cations via noncovalent interactions. In the presence of the sacrificial agent triethanolamine, P-PW exhibits a PC H₂ generation rate of 0.418 mmol/g/h, surpassing that of P₂W₁₈ and PHB by 15 and 17 times, respectively. This enhancement in PC performance of P-PW can be attributed to its band structure change from the precursor compounds, leading to increased light absorption and therefore more efficient PC hydrogen production.