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Photocatalytic H2O2 and H2 Generation from Living Chlorella vulgaris and Carbon Micro Particle Comodified g‐C3N4
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2018-10-14 , DOI: 10.1002/aenm.201802525
Yijun Fu 1 , Chang'an Liu 1 , Mengling Zhang 1 , Cheng Zhu 1 , Hao Li 1 , Huibo Wang 1 , Yuxiang Song 1 , Hui Huang 1 , Yang Liu 1 , Zhenhui Kang 1
Affiliation  

Hydrogen production from water splitting using photocatalysts and solar energy is an ideal pathway to obtain future energy sources which are cheap and easy to industrialize. In the water splitting process, the reduction of H2O gives H2, while H2O oxidation produces O2 with hydrogen peroxide (H2O2) in tiny amounts as a by‐product (poisoning the catalyst). It remains challenging to simultaneously produce H2O2 and H2 within one photocatalytic system. Inspired by a biological H2O2 generator, chlorella, the authors firstly realize the simultaneous photocatalytic water splitting and biological H2O2 generation by a living Chlorella vulgaris and carbon micro particle (needle coke) comodified g‐C3N4 (C‐N‐g‐C3N4) photocatalyst. The C‐N‐g‐C3N4 exhibits the optimal H2O2 (H2) evolution rate of 0.98 µmol h−1 (0.84 µmol h−1), giving an apparent quantum efficiency of 0.86% for H2 evolution at 420 nm. In this system, the needle coke serves as cocatalyst to work as reduction sites for H2 evolution, while the living C. vulgaris plays the key role in the production of H2O2 under the protection of g‐C3N4.

中文翻译:

普通小球藻和碳微粒共改性g-C3N4产生光催化的H2O2和H2生成

使用光催化剂和太阳能将水分解产生的氢气是获取廉价且易于工业化的未来能源的理想途径。在水分解过程中,H的还原2 O的表达式ħ 2功能,H 2 O型氧化产生ö 2与过氧化氢(H 2 ö 2)在微量作为副产物(催化剂中毒)。在一个光催化系统中同时产生H 2 O 2和H 2仍然具有挑战性。受到生物H 2 O 2的启发发生器,小球藻,作者首先通过共生的g-C 3 N 4(C-N-g-C 3 N )通过活的小球藻和碳微粒(针状焦)实现了光催化水分解和生物H 2 O 2的同时生成。4)光催化剂。C‐N‐g‐C 3 N 4的最佳H 2 O 2(H 2)释放速率为0.98 µmol h -1(0.84 µmol h -1),对于H 2而言,表观量子效率为0.86%在420 nm处演化。在该系统中,针状焦炭充当助催化剂,充当H 2逸出的还原位,而活的寻常小球藻在g-C 3 N 4的保护下在H 2 O 2的生产中起关键作用。
更新日期:2018-10-14
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