期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 544, 期 -, 页码 155-163出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2019.02.089
关键词
Diatomite; Three dimensional graphene; Nitrogen-doping; MnO2; Supercapacitor; Electrocatalyst
资金
- National Natural Science Foundation of China [21576034]
- Innovative Research Team of Chongqing, China [CXTDG201602014]
- Fundamental Research Funds for the Central Universities, China [2018CDYJSY0055, 106112017CDJQJ138802, 106112017CDJXSYY0001, 106112017CDJSK04XKl 1, 2018CDQYCL0027]
- Chongqing Special Postdoctoral Science Foundation, China [XmT2018043]
- Technological Projects of Chongqing Municipal Education Commission, China [KJZD-K201800801]
- State Education Ministry
Natural diatomite with abundant pores was used as a biotemplate for the massive production of three-dimensional (3D) porous graphene by chemical vapor deposition method. Subsequent template removal and nitrogen doping treatment yield nitrogen doped 3D graphene with preserved shape and complex internal features of the diatomite. After further deposition with MnO2 nanosheets, the N-doped 3D graphene@MnO2 (N-G@MnO2) hybrid exhibited excellent supercapacitor and good oxygen reduction reaction (ORR) performance. Accordingly, the porous N-G@MnO2 electrode exhibited a high specific capacitance (411.5 F g(-1)) and a good cycling performance (88.3% capacitance retention after 4000 charge/discharge cycling test). When tested in a two-electrode configuration, N-G@MnO2 achieved a wide potential window up to 1.8 V with a high energy density of 46.1 Wh kg(-1). Furthermore, the as prepared N-G@MnO2 showed good performance in oxygen reduction reaction, which is comparable to those of commercially available Pt/C electrode. The enhanced capacitive and electrocatalytic properties and stability is due to the synergistic interactions between the porous 3D graphene and MnO2 nanosheets. The results indicate that the 3D N-G@MnO2 could be useful for supercapacitor and ORR catalyst. (C) 2019 Elsevier Inc. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据