Interface Charge Transfer versus Surface Proton Reduction: Which Is More Pronounced on Photoinduced Hydrogen Generation over Sensitized Pt Cocatalyst on RGO? | |
Department | OSSO国家重点实验室 |
Li Z(李振)1,2; Wang, Qiansen; Kong C(孔超)1,2; Wu YQ(吴玉琪)1; Li YX(李越湘)3; Lu GX(吕功煊)1; Lv GX(吕功煊) | |
The second department | erc国家工程研究中心 |
2015 | |
Source Publication | Journal of Physical Chemistry C |
ISSN | 1932-7447 |
Volume | 119Issue:24Pages:13561-13568 |
Abstract | The roles of interface charge transfer and surface proton reduction on photocatalytic hydrogen generation were investigated using Pt cocatalyst on RGO as a model catalyst. The results indicated that the interface charge transfer between reduced graphite oxide (RGO) and Pt nanoparticles (Pt NPs) was more pronounced on photoinduced hydrogen generation over sensitized Pt cocatalyst on RGO than surface proton reduction reaction. The photogenerated electron interface transfer could be modulated by controlling surface potential energy on a selectively exposed Pt facet. By X-ray photoelectron spectroscopy (XPS) and the fluorescence lifetime experiments, we proved that Pt(100) NPs had a noticeably stronger interaction with RGO than Pt(111) NPs, which resulted in a faster electron transfer from RGO to Pt(100) NPs and eventually led to higher activity for hydrogen evolution than Pt(111)/RGO cocatalyst. The XPS results confirmed this interaction difference; that is, the different facets of Pt NPs loading on RGO coresponded to different binding energy. The binding energy of Pt(100) f7/2 shifted to higher energy side by 0.54 eV on RGO, while the binding energy of Pt(111) f7/2 shifted up only ∼0.31 eV. The results of fluorescence lifetime verified that the photogenerated electrons transferred faster from RGO to Pt(100) NPs than to Pt(111) NPs, indicating Pt(100) NPs more strongly interacted with RGO. This study disclosed the facet-dependent effect of noble-metal Pt cocatalyst on RGO in photocatalytic water reduction and will give insight into understanding the electron transfer between Pt NPs and RGO. |
Subject Area | 物理化学与绿色催化 |
DOI | 10.1021/acs.jpcc.5b00746 |
Funding Organization | the NSF of China (grant nos. 21173242;21433007);the 973 and 863 Program of Department of Sciences and Technology of China (2013CB632404;2012AA051501) |
Indexed By | SCI |
If | 4.509 |
Language | 英语 |
Funding Project | 环境催化与清洁能源研究组;环境催化与氢能源研究组 |
compositor | 第一作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/18321 |
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 3.Nanchang Univ, Nanchang 330031, Peoples R China |
Recommended Citation GB/T 7714 | Li Z,Wang, Qiansen,Kong C,et al. Interface Charge Transfer versus Surface Proton Reduction: Which Is More Pronounced on Photoinduced Hydrogen Generation over Sensitized Pt Cocatalyst on RGO?[J]. Journal of Physical Chemistry C,2015,119(24):13561-13568. |
APA | Li Z.,Wang, Qiansen.,Kong C.,Wu YQ.,Li YX.,...&吕功煊.(2015).Interface Charge Transfer versus Surface Proton Reduction: Which Is More Pronounced on Photoinduced Hydrogen Generation over Sensitized Pt Cocatalyst on RGO?.Journal of Physical Chemistry C,119(24),13561-13568. |
MLA | Li Z,et al."Interface Charge Transfer versus Surface Proton Reduction: Which Is More Pronounced on Photoinduced Hydrogen Generation over Sensitized Pt Cocatalyst on RGO?".Journal of Physical Chemistry C 119.24(2015):13561-13568. |
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