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Design of Hierarchical NiCo2O4 Nanocages with Excellent Electrocatalytic Dynamic for Enhanced Methanol Oxidation
Li, Xue1,2; He, Gege3; Zeng, Chong1; Zhou, Dengmei1; Xiang, Jing1; Chen, Wenbo1; Tian, Liangliang1; Yang, Wenyao1; Cheng, Zhengfu1; Song, Jing4
2021-10-01
Source PublicationNANOMATERIALS
Volume11Issue:10Pages:10
AbstractAlthough sheet-like materials have good electrochemical properties, they still suffer from agglomeration problems during the electrocatalytic process. Integrating two-dimensional building blocks into a hollow cage-like structure is considered as an effective way to prevent agglomeration. In this work, the hierarchical NiCo2O4 nanocages were successfully synthesized via coordinated etching and precipitation method combined with a post-annealing process. The nanocages are constructed through the interaction of two-dimensional NiCo2O4 nanosheets, forming a three-dimensional hollow hierarchical architecture. The three-dimensional supporting cavity effectively prevents the aggregation of NiCo2O4 nanosheets and the hollow porous feature provides amounts of channels for mass transport and electron transfer. As an electrocatalytic electrode for methanol, the NiCo2O4 nanocages-modified glassy carbon electrode exhibits a lower overpotential of 0.29 V than those of NiO nanocages (0.38 V) and Co3O4 nanocages (0.34 V) modified glassy carbon electrodes. The low overpotential is attributed to the prominent electrocatalytic dynamic issued from the three-dimensional hollow porous architecture and two-dimensional hierarchical feature of NiCo2O4 building blocks. Furthermore, the hollow porous structure provides sufficient interspace for accommodation of structural strain and volume change, leading to improved cycling stability. The NiCo2O4 nanocages-modified glassy carbon electrode still maintains 80% of its original value after 1000 consecutive cycles. The results demonstrate that the NiCo2O4 nanocages could have potential applications in the field of direct methanol fuel cells due to the synergy between two-dimensional hierarchical feature and three-dimensional hollow structure.

Keywordhierarchical hollow nanocages NiCo2O4 coordinated etching and precipitation methanol oxidation fuel cell
DOI10.3390/nano11102667
Language英语
WOS KeywordFACILE SYNTHESIS ; EFFICIENT ELECTROCATALYSTS ; MESOPOROUS NICO2O4 ; PERFORMANCE ; OXIDES ; PD ; ELECTROOXIDATION ; NANOSTRUCTURES ; SURFACE ; GROWTH
Funding ProjectAcademician Project of Chongqing Science and Technology Bureau[cstc2018jcyj-yszxX0003] ; Natural Science Foundation of Chongqing[cstc2020jcyj-msxmX0103] ; Natural Science Foundation of Chongqing[cstc2019jcyj-msxmX0875] ; Natural Science Foundation of Chongqing[cstc2019jcyj-msxmX0411] ; Natural Science Foundation of Chongqing[cstc2018jcyjAX0492] ; Fund for Creative Research Group of Micro-Nano Semiconductor & Photonic Materials of Chongqing Municipal Education Commission ; Scientific and Technological Research Program of Chongqing Municipal Education Commission[KJZD-K202001305] ; Scientific and Technological Research Program of Chongqing Municipal Education Commission[KJQN20181315] ; Scientific and Technological Research Program of Chongqing Municipal Education Commission[KJQN201901316] ; Scientific and Technological Research Program of Chongqing Municipal Education Commission[KJQN202001325] ; Scientific and Technological Research Program of Chongqing Municipal Education Commission[KJQN201901349] ; Foundation of Chongqing University of Arts and Sciences[P2018CL08] ; Foundation of Chongqing University of Arts and Sciences[M2020 ME33] ; Natural Science Foundation of Yongchuan (Ycstc) ; [HZ2021013] ; [R2020SDQ02] ; [2020nb0602]
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS SubjectChemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
Funding OrganizationAcademician Project of Chongqing Science and Technology Bureau ; Natural Science Foundation of Chongqing ; Fund for Creative Research Group of Micro-Nano Semiconductor & Photonic Materials of Chongqing Municipal Education Commission ; Scientific and Technological Research Program of Chongqing Municipal Education Commission ; Foundation of Chongqing University of Arts and Sciences ; Natural Science Foundation of Yongchuan (Ycstc)
WOS IDWOS:000714513100001
PublisherMDPI
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/50856
Collection中国科学院过程工程研究所
Corresponding AuthorTian, Liangliang; Yang, Wenyao; Cheng, Zhengfu
Affiliation1.Chongqing Univ Arts & Sci, Sch Elect Informat & Elect, Chongqing 400000, Peoples R China
2.Chongqing Univ Posts & Telecommun, Sch Sci, Chongqing 400065, Peoples R China
3.Xi An Jiao Tong Univ, Sch Phys, Xian 710000, Shanxi, Peoples R China
4.Chinese Acad Sci, Inst Proc Engn, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Li, Xue,He, Gege,Zeng, Chong,et al. Design of Hierarchical NiCo2O4 Nanocages with Excellent Electrocatalytic Dynamic for Enhanced Methanol Oxidation[J]. NANOMATERIALS,2021,11(10):10.
APA Li, Xue.,He, Gege.,Zeng, Chong.,Zhou, Dengmei.,Xiang, Jing.,...&Song, Jing.(2021).Design of Hierarchical NiCo2O4 Nanocages with Excellent Electrocatalytic Dynamic for Enhanced Methanol Oxidation.NANOMATERIALS,11(10),10.
MLA Li, Xue,et al."Design of Hierarchical NiCo2O4 Nanocages with Excellent Electrocatalytic Dynamic for Enhanced Methanol Oxidation".NANOMATERIALS 11.10(2021):10.
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