Kagome Cobalt(II)-Organic Layers as Robust Scaffolds for Highly Efficient Photocatalytic Oxygen Evolution
文献类型：期刊论文
| 作者 | Xu, Jiaheng1; Wang, Zhi1; Yu, Wenguang2; Sun, Di1; Zhang, Qing2; Tung, Chen-Ho1; Wang, Wenguang1 |
| 刊名 | CHEMSUSCHEM
 |
| 出版日期 | 2016-05-23 |
| 卷号 | 9期号:10页码:1146-1152 |
| 关键词 | Heterogeneous Catalysis Metal-organic Frameworks Oxygen Photochemistry Water Splitting |
| ISSN号 | 1864-5631 |
| DOI | 10.1002/cssc.201600101 |
| 文献子类 | Article |
| 英文摘要 | Two Kagome cobalt(II)-organic layers of [Co-3(mu(3)-OH)(2)(bdc)(2)](n) (1) and [Co-3(mu(3)-OH)(2)(chdc)(2)](n) (2) (bdc=o-benzenedicarboxylate and chdc=1,2-cyclohexanedicarboxylate) that bear bridging OH-ligands were explored as water oxidation catalysts (WOCs) for photocatalytic O-2 production. The activities of 1 and 2 towards H2O oxidation were assessed by monitoring the in situ O-2 concentration versus time in the reaction medium by utilizing a Clark-type oxygen electrode under photochemical conditions. The oxygen evolution rate (R-O2) was 24.3 mu mols(-1) g(-1) for 1 and 48.8 mu mol s(-1) g(-1) for 2 at pH 8.0. Photocatalytic reaction studies show that 1 and 2 exhibit enhanced activities toward the oxidation of water compared to commercial nanosized Co3O4. In scaled-up photoreactions, the pH value of the reaction medium decreased from 8.0 to around 7.0 after 20 min and the O-2 production ceased. Based on the amounts of the sacrificial oxidant (K2S2O delta) used, the yield of O-2 produced is 49.6% for 2 and 29.8% for 1. However, the catalyst can be recycled without a significant loss of catalytic activity. Spectroscopic studies suggest that the structure and composition of recycled 1 and 2 are maintained. In isotope-labeling (H2O)-O-18 (97% enriched) experiments, the distribution of (OO)-O-16-O-16/(OO)-O-16-O-18/(OO)-O-18-O-18 detected was 0:7.55:92.45, which is comparable to the theoretical values of 0.09:5.82:94.09. This work not only provides new catalysts that resemble ligand-protected cobalt oxide materials but also establishes the significance of the existence of OH (or H2O) binding sites at the metal center in WOCs. |
| WOS关键词 | DRIVEN WATER OXIDATION ; MONONUCLEAR RUTHENIUM COMPLEXES ; METAL-ORGANIC FRAMEWORKS ; NEUTRAL AQUEOUS-SOLUTION ; PHOTOSYSTEM-II ; IRIDIUM COMPLEXES ; HOMOGENEOUS OXIDATION ; IRON COMPLEXES ; SOLAR FUEL ; CATALYSTS |
| WOS研究方向 | Chemistry |
| 语种 | 英语 |
| WOS记录号 | WOS:000378635500013 |
| 出版者 | WILEY-V C H VERLAG GMBH |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/170468]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 通讯作者 | Sun, Di; Wang, Wenguang |
| 作者单位 | 1.Shandong Univ, Sch Chem & Chem Engn, Key Lab Colloid & Interface Chem, Minist Educ, Jinan 250100, Peoples R China 2.Chinese Acad Sci, Dalian Inst Chem Phys, 457 Zhongshan Rd, Dalian 116023, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, Jiaheng,Wang, Zhi,Yu, Wenguang,et al. Kagome Cobalt(II)-Organic Layers as Robust Scaffolds for Highly Efficient Photocatalytic Oxygen Evolution[J]. CHEMSUSCHEM,2016,9(10):1146-1152. |
| APA | Xu, Jiaheng.,Wang, Zhi.,Yu, Wenguang.,Sun, Di.,Zhang, Qing.,...&Wang, Wenguang.(2016).Kagome Cobalt(II)-Organic Layers as Robust Scaffolds for Highly Efficient Photocatalytic Oxygen Evolution.CHEMSUSCHEM,9(10),1146-1152. |
| MLA | Xu, Jiaheng,et al."Kagome Cobalt(II)-Organic Layers as Robust Scaffolds for Highly Efficient Photocatalytic Oxygen Evolution".CHEMSUSCHEM 9.10(2016):1146-1152. |
入库方式： OAI收割
来源：大连化学物理研究所
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