Inhibition of hydrogen and oxygen recombination over amide–functionalized graphene and the enhancement of photocatalytic hydrogen generation in dye–sensitized AF–RGO/Pt photocatalyst dispersion | |
Department | OSSO国家重点实验室 |
Xuqiang Zhang1; Dan Luo2; Wenyan Zhang1,3,4; Wei Gao1,3; Xiaofeng Ning1,3; Hongxia Liu1,3; Bin Tian1,3; Baojun Yang1; Gongxuan Lu1 | |
2018-09 | |
Source Publication | Applied Catalysis B: Environmental |
Volume | 232Issue:0Pages:371-383 |
Abstract | Photocatalytic hydrogen evolution (PHE) is a promising way to generate hydrogen driven by solar light. Noble metallic Pt is usually used as a co–catalyst to catalyze this reaction. However, Pt can also act as an active center for H2 and O2 recombination reverse reaction, which results in the low photocatalytic efficiency for H2 generation. Herein, the H2 and O2recombination can remarkably be inhibited by incorporating amide–functionalized groups onto graphene surface and edge, which act as the oxygen adsorbent site and reduce migration of O2 molecules in the dye–sensitized PHE system. Theoretical studies verify that the adsorption energy of oxygen change remarkable due to orbital hybridization by N 2p in amide group with O 2p in O2 molecule, leading to redistribution the electron structure of graphene, and change of electrical properties of sensitized matrix. By amide–functionalized graphene (AF–RGO), we achieved high H2 evolution activity over AF–RGO/Pt nanohybrid catalyst under visible light irradiation. The quantum efficiency of AF–RGO/Pt (AF–RGO prepared at 140 °C) achieved 36.4% at 430 nm. This superior photocatalytic performance can be attributed to the repression of H2 and O2 recombination and the synergy of electrical properties. This work is helpful to design high active catalyst for solar hydrogen generation. |
Keyword | Amide–functionalized Graphene Variation Of Oxygen Adsorption Energy The Inhibition Of Reverse H2 And O2 High Efficient Photocatalytic Hydrogen Quantum Efficiency |
DOI | 10.1016/j.apcatb.2018.03.070 |
Indexed By | SCI |
If | 11.698 |
Language | 英语 |
compositor | 第一作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/24455 |
Collection | 羰基合成与选择氧化国家重点实验室(OSSO) |
Corresponding Author | Baojun Yang; Gongxuan Lu |
Affiliation | 1.State Key Laboratory for Oxo Synthesis and Selective Oxidation Lanzhou Institute of Chemical Physics, Chinese Academy of Science, Lanzhou, 730000, China 2.College of Physics & Electronic Engineering, Northwest Normal University, Lanzhou, 730070, China 3.University of Chinese Academy of Science, Beijing, 100049, China 4.College of Material Engineering, Jinling Institute of Technology, Nanjing, China |
Recommended Citation GB/T 7714 | Xuqiang Zhang,Dan Luo,Wenyan Zhang,等. Inhibition of hydrogen and oxygen recombination over amide–functionalized graphene and the enhancement of photocatalytic hydrogen generation in dye–sensitized AF–RGO/Pt photocatalyst dispersion[J]. Applied Catalysis B: Environmental,2018,232(0):371-383. |
APA | Xuqiang Zhang.,Dan Luo.,Wenyan Zhang.,Wei Gao.,Xiaofeng Ning.,...&Gongxuan Lu.(2018).Inhibition of hydrogen and oxygen recombination over amide–functionalized graphene and the enhancement of photocatalytic hydrogen generation in dye–sensitized AF–RGO/Pt photocatalyst dispersion.Applied Catalysis B: Environmental,232(0),371-383. |
MLA | Xuqiang Zhang,et al."Inhibition of hydrogen and oxygen recombination over amide–functionalized graphene and the enhancement of photocatalytic hydrogen generation in dye–sensitized AF–RGO/Pt photocatalyst dispersion".Applied Catalysis B: Environmental 232.0(2018):371-383. |
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