Synergistic impact of cocatalysts and hole scavenger for promoted photocatalytic H2 evolution in mesoporous TiO2–NiSx hybrid  

作　　者：Yi Wei Gang Cheng Jinyan Xiong Jiaxin Zhu Yixin Gan Mengmeng Zhang Zhen Li Shixue Dou 

机构地区：[1]School of Chemistry and Environmental Engineering,Wuhan Institute of Technology,Wuhan 430073,Hubei,China [2]College of Chemistry and Chemical Engineering,Wuhan Textile University,Wuhan 430200,Hubei,China [3]School of Radiation Medicine and Radiation Protection,Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions,Soochow University,Suzhou 215123,Jiangsu,China [4]Institute for Superconducting and Electronic Materials,University of Wollongong.North Wollongong NSW2500,Australia

出　　处：《Journal of Energy Chemistry》2019年第5期45-56,共12页能源化学（英文版）

基　　金：the National Natural Science Foundation of China(21501137);the Hubei Natural Science Foundation for financial support(2018CFB680);Support from the Australian Research Council(ARC)through ARC Discovery projects(DP130102699,DP 130102274,DP160102627)

摘　　要：Photocatalytic solar energy conversion to hydrogen is sustainable and attractive for addressing the global energy and environmental issue. Herein, a novel photocatalytic system (NiS/Ni3S4 cocatalysts modified mesoporous TiO2) with superior photocatalytic hydrogen evolution capability through the synergistic impact of NiS/Ni3S4 (NiSx) cocatalyst and efficient hole scavenger has been demonstrated. The photocatalytic hydrogen evolution of TiO2-NiSx hybrids with the different content of NiSx and upon different organic hole scavengers was both investigated. The hybrid of TiO2 decorated with 3%(mole ratio of Ni^2+) NiSx cocatalyst in methanol solution showed the optimal photocatalytic hydrogen evolution rate of 981.59 μmol h^-1 g^-1 which was about 20 times higher than that of bare mesoporous TiO2. Our results suggested that the boosted hydrogen production performance is attributed to both the improved photoinduced electrons migration between NiS and Ni3S4 in cocatalyst and the high hole captured efficiency by hole scavengers of methanol.Photocatalytic solar energy conversion to hydrogen is sustainable and attractive for addressing the global energy and environmental issue. Herein, a novel photocatalytic system（NiS/Ni3S4 cocatalysts modified mesoporous TiO2） with superior photocatalytic hydrogen evolution capability through the synergistic impact of NiS/Ni3S4（NiSx） cocatalyst and efficient hole scavenger has been demonstrated. The photocatalytic hydrogen evolution of TiO2–Ni Sxhybrids with the different content of Ni Sxand upon different organic hole scavengers was both investigated. The hybrid of TiO2 decorated with 3%(mole ratio of Ni2+) Ni Sxcocatalyst in methanol solution showed the optimal photocatalytic hydrogen evolution rate of 981.59 μmol h-1g-1 which was about 20 times higher than that of bare mesoporous TiO2. Our results suggested that the boosted hydrogen production performance is attributed to both the improved photoinduced electrons migration between NiS and Ni3S4 in cocatalyst and the high hole captured efficiency by hole scavengers of methanol.

关 键 词：NiS/Ni3S4 COCATALYST PHOTOCATALYTIC hydrogen EVOLUTION Mesoporous TiO2 HOLE SCAVENGER 

分 类 号：O4[理学—物理]