51
|
Yu B, Qi F, Zheng B, Zhou J, Chen Y. One-pot synthesis of self-assembled coral-like hierarchical architecture constructed by polymorphic CoSe2 nanocrystals as superior electrocatalyst for hydrogen evolution reaction. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.05.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
52
|
Chen T, Li S, Gui P, Wen J, Fu X, Fang G. Bifunctional bamboo-like CoSe 2 arrays for high-performance asymmetric supercapacitor and electrocatalytic oxygen evolution. NANOTECHNOLOGY 2018; 29:205401. [PMID: 29469814 DOI: 10.1088/1361-6528/aab19b] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Bifunctional bamboo-like CoSe2 arrays are synthesized by thermal annealing of Co(CO3)0.5OH grown on carbon cloth in Se atmosphere. The CoSe2 arrays obtained have excellent electrical conductivity, larger electrochemical active surface areas, and can directly serve as a binder-free electrode for supercapacitors and the oxygen evolution reaction (OER). When tested as a supercapacitor electrode, the CoSe2 delivers a higher specific capacitance (544.6 F g-1 at current density of 1 mA cm-2) compared with CoO (308.2 F g-1) or Co3O4 (201.4 F g-1). In addition, the CoSe2 electrode possesses excellent cycling stability. An asymmetric supercapacitor (ASC) is also assembled based on bamboo-like CoSe2 as a positive electrode and active carbon as a negative electrode in a 3.0 M KOH aqueous electrolyte. Owing to the unique stucture and good electrochemical performance of bamboo-like CoSe2, the as-assembled ACS can achieve a maximum operating voltage window of 1.7 V, a high energy density of 20.2 Wh kg-1 at a power density of 144.1 W kg-1, and an outstanding cyclic stability. As the catalyst for the OER, the CoSe2 exhibits a lower potential of 1.55 V (versus RHE) at current density of 10 mA cm-2, a smaller Tafel slope of 62.5 mV dec-1 and an also outstanding stability.
Collapse
Affiliation(s)
- Tian Chen
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, 430072, People's Republic of China
| | | | | | | | | | | |
Collapse
|
53
|
Guo M, Xu K, Qu Y, Zeng F, Yuan C. Porous Co3O4/CoS2 nanosheet-assembled hierarchical microspheres as superior electrocatalyst towards oxygen evolution reaction. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.02.088] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
|
54
|
Zhao H, Li Y, Wang D, Zhao L. Synthesis of N-Doped Core-Shell-Structured Porous CoSe@C Composites and their Efficient Catalytic Activity for the Reduction of 4-Nitrophenol. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201701259] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Haoyang Zhao
- School of Chemistry and Environmental Engineering; Changchun University of Science and Technology; 130022 Changchun Jilin China
- State Key Laboratory of Rare Earth Resource Utilization; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences; 130022 Changchun P. R. China
| | - Yunhui Li
- School of Chemistry and Environmental Engineering; Changchun University of Science and Technology; 130022 Changchun Jilin China
| | - Dongsheng Wang
- School of Chemistry and Environmental Engineering; Changchun University of Science and Technology; 130022 Changchun Jilin China
| | - Lang Zhao
- State Key Laboratory of Rare Earth Resource Utilization; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences; 130022 Changchun P. R. China
| |
Collapse
|
55
|
Fe-doped CoSe2 nanoparticles encapsulated in N-doped bamboo-like carbon nanotubes as an efficient electrocatalyst for oxygen evolution reaction. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.01.211] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
56
|
Chen T, Li S, Wen J, Gui P, Guo Y, Guan C, Liu J, Fang G. Rational Construction of Hollow Core-Branch CoSe 2 Nanoarrays for High-Performance Asymmetric Supercapacitor and Efficient Oxygen Evolution. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:1700979. [PMID: 29251409 DOI: 10.1002/smll.201700979] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2017] [Revised: 10/22/2017] [Indexed: 06/07/2023]
Abstract
Metal selenides have great potential for electrochemical energy storage, but are relatively scarce investigated. Herein, a novel hollow core-branch CoSe2 nanoarray on carbon cloth is designed by a facile selenization reaction of predesigned CoO nanocones. And the electrochemical reaction mechanism of CoSe2 in supercapacitor is studied in detail for the first time. Compared with CoO, the hollow core-branch CoSe2 has both larger specific surface area and higher electrical conductivity. When tested as a supercapacitor positive electrode, the CoSe2 delivers a high specific capacitance of 759.5 F g-1 at 1 mA cm-2 , which is much larger than that of CoO nanocones (319.5 F g-1 ). In addition, the CoSe2 electrode exhibits excellent cycling stability in that a capacitance retention of 94.5% can be maintained after 5000 charge-discharge cycles at 5 mA cm-2 . An asymmetric supercapacitor using the CoSe2 as cathode and an N-doped carbon nanowall as anode is further assembled, which show a high energy density of 32.2 Wh kg-1 at a power density of 1914.7 W kg-1 , and maintains 24.9 Wh kg-1 when power density increased to 7354.8 W kg-1 . Moreover, the CoSe2 electrode also exhibits better oxygen evolution reaction activity than that of CoO.
Collapse
Affiliation(s)
- Tian Chen
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, 430072, P. R. China
| | - Songzhan Li
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, 430072, P. R. China
| | - Jian Wen
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, 430072, P. R. China
| | - Pengbin Gui
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, 430072, P. R. China
| | - Yaxiong Guo
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, 430072, P. R. China
| | - Cao Guan
- Department of Materials Science and Engineering, National University of Singapore, 117574, Singapore
| | - Jinping Liu
- School of Chemistry, Chemical Engineering and Life Science and State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, P. R. China
| | - Guojia Fang
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, 430072, P. R. China
| |
Collapse
|
57
|
Yuan X, Wang X, Riaz MS, Dong C, Zhang Z, Huang F. Efficient catalysts for oxygen evolution derived from cobalt-based alloy nanochains. Catal Sci Technol 2018. [DOI: 10.1039/c8cy00226f] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
One-dimensional nanomaterials are widely used in electrocatalysis owing to their high charge transfer efficiency.
Collapse
Affiliation(s)
- Xiaotao Yuan
- Beijing National Laboratory for Molecular Sciences and
- State Key Laboratory of Rare Earth Materials Chemistry and Applications
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
| | - Xin Wang
- Beijing National Laboratory for Molecular Sciences and
- State Key Laboratory of Rare Earth Materials Chemistry and Applications
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
| | - Muhammad Sohail Riaz
- Beijing National Laboratory for Molecular Sciences and
- State Key Laboratory of Rare Earth Materials Chemistry and Applications
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
| | - Chenlong Dong
- Beijing National Laboratory for Molecular Sciences and
- State Key Laboratory of Rare Earth Materials Chemistry and Applications
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
| | - Zhe Zhang
- Beijing National Laboratory for Molecular Sciences and
- State Key Laboratory of Rare Earth Materials Chemistry and Applications
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
| | - Fuqiang Huang
- Beijing National Laboratory for Molecular Sciences and
- State Key Laboratory of Rare Earth Materials Chemistry and Applications
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
| |
Collapse
|