Construction of Mobius-strip-like graphene for highly efficient charge transfer and high active hydrogen evolution | |
Department | OSSO国家重点实验室 |
Zhang XQ(张旭强)1; Tian B(田彬)1,2; Zhen WL(甄文龙)1; Li Z(李振)1,2; Wu YQ(吴玉琪)1; Lu GX(吕功煊)1; Lv GX(吕功煊) | |
2017 | |
Source Publication | Journal of Catalysis |
ISSN | 0021-9517 |
Volume | 354Pages:258-269 |
Abstract | Charge transfer between the two surfaces of graphene is limited due to the anisotropy of graphene structure. To overcome this anisotropy of graphene in charge transfer, construction of an equivalent Mobius strip by iodination can provide a feasible approach to altering the charge transfer route by fabricating a coplanar structure. In this work, the conductivity, carrier concentration, mobility, and charge transfer efficiency of a Mobius-strip-like iodination graphene (MSIG) are significantly improved owing to the coplanar character of the topology, which is stitched by chainlike connected polyiodides (I3- and I5-) over the edge of graphene. Such a Mobius-strip-like route offered easier electron tunneling between two graphene surfaces by strong Rashba spin-orbit coupling and flip-flop electron tunneling, and this flip-flop electron tunneling bridged the easier transfer route between far-located carbon atoms at the edges of graphene through the p orbitals in polyiodides. As a result, the electron transfer between the two graphene surfaces was enhanced. Activity results indicated that the photocatalyst MSIG/Pt based on such Mobius strip graphene exhibited better hydrogen evolution activity than un-iodide-doped graphene. The highest quantum efficiency, 35.6%, was achieved at 430 nm when Eosin Y was used as a photosensitizes. This enhancement could be attributed to lower energy consumption during electron transfer in MSIG from excited Eosin Y to the Pt co-catalyst because of reduced recombination of photogenerated carriers and prolonged lifetimes of photogenerated electrons. |
Keyword | Mobius-strip-like Iodination Graphene Topological Structure Anisotropy Highly Efficient Charge Transfer High Active Photocatalytic Hydrogen Evolution |
Subject Area | 物理化学与绿色催化 |
DOI | 10.1016/j.jcat.2017.08.021 |
Funding Organization | the National Natural Science Foundation of China (grant nos. 21173242;21433007);the 973 Programs of 60 Department of Sciences and Technology of China (2013CB632404;2012AA051501) |
Indexed By | SCI |
If | 6.844 |
Language | 英语 |
Funding Project | 环境催化与氢能研究组 |
compositor | 第一作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/22534 |
Collection | 羰基合成与选择氧化国家重点实验室(OSSO) |
Corresponding Author | Lv GX(吕功煊) |
Affiliation | 1.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Oxo Synth & Select Oxidat, Lanzhou 730000, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
Recommended Citation GB/T 7714 | Zhang XQ,Tian B,Zhen WL,et al. Construction of Mobius-strip-like graphene for highly efficient charge transfer and high active hydrogen evolution[J]. Journal of Catalysis,2017,354:258-269. |
APA | Zhang XQ.,Tian B.,Zhen WL.,Li Z.,Wu YQ.,...&吕功煊.(2017).Construction of Mobius-strip-like graphene for highly efficient charge transfer and high active hydrogen evolution.Journal of Catalysis,354,258-269. |
MLA | Zhang XQ,et al."Construction of Mobius-strip-like graphene for highly efficient charge transfer and high active hydrogen evolution".Journal of Catalysis 354(2017):258-269. |
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2017, 354, 258-269, (3312KB) | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Application Full Text |
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