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Engineering Cobalt Defects in Cobalt Oxide for Highly Efficient Electrocatalytic Oxygen Evolution
文献类型：期刊论文
| 作者 | Shen, GQ; Pan, L ; Zhang, YC; Zhang, RR; Mahmood, N; Ma, YH; Shi, Y; Jia, WY; Wang, L; Zhang, XW
|
| 刊名 | ACS CATALYSIS
 |
| 出版日期 | 2018 |
| 卷号 | 8期号:5页码:3803-3811 |
| 关键词 | cobalt oxide metal defects electrocatalytic oxygen evolution electron delocalization |
| ISSN号 | 2155-5435 |
| DOI | 10.1021/acscatal.8b01046 |
| 文献子类 | Article |
| 英文摘要 | Defect engineering is an effective way to modulate the electric states and provide active sites for electrocatalytic reactions. However, most studied oxygen vacancies are unstable and susceptible under the oxygen circumstance. Here, we fabricated cobalt-defected Co3-xO4 in situ for an efficient oxygen evolution reaction (OER). XAFS and PALS characterizations show that the crystals have abundant Co vacancies and a distorted structure. DFT calculations indicate that the metal defects lead to obvious electronic delocalization, which enhances the carrier transport to participate in water-splitting reactions along the defective conducting channels and the water adsorption/activation on the catalyst surface. Therefore, cobalt-defected Co-3-xO(4) shows remarkably high OER activity by delivering a much lower overpotential of 268 mV@ 10 mA cm(-2) (with a small Tafel slope of 38.2 mV/dec) for OER in KOH electrolyte, in comparison with normal Co3O4 (376 mV), IrO2 (340 mV), and RuO2 (276 mV). This work opens up a promising approach to construct electronic delocalization structures in metal oxides for high-performance electrochemical catalysts. |
| WOS关键词 | CO3O4 NANOSHEETS ; WATER OXIDATION ; VACANCIES ; ANODES ; PERFORMANCE ; REDUCTION ; CATALYSTS ; GRAPHENE ; COPPER ; TIO2 |
| WOS研究方向 | Chemistry |
| 语种 | 英语 |
| WOS记录号 | WOS:000431727300009 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/286032]  |
| 专题 | 高能物理研究所_多学科研究中心 中国科学院高能物理研究所_中国散裂中子源 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Shen, GQ,Pan, L,Zhang, YC,et al. Engineering Cobalt Defects in Cobalt Oxide for Highly Efficient Electrocatalytic Oxygen Evolution[J]. ACS CATALYSIS,2018,8(5):3803-3811. |
| APA | Shen, GQ.,Pan, L.,Zhang, YC.,Zhang, RR.,Mahmood, N.,...&徐伟.(2018).Engineering Cobalt Defects in Cobalt Oxide for Highly Efficient Electrocatalytic Oxygen Evolution.ACS CATALYSIS,8(5),3803-3811. |
| MLA | Shen, GQ,et al."Engineering Cobalt Defects in Cobalt Oxide for Highly Efficient Electrocatalytic Oxygen Evolution".ACS CATALYSIS 8.5(2018):3803-3811. |
入库方式： OAI收割
来源：高能物理研究所
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