IMR OpenIR

Optimizing the electronic spin state and delocalized electron of NiCo2(OH)(x)/MXene composite by interface engineering and plasma boosting oxygen evolution reaction

Xu, Jingyao1; Zhong, Xia2,3; Wu, Xiaofeng1; Wang, Ying4; Feng, Shouhua1
Corresponding AuthorWu, Xiaofeng(wuxf@jlu.edu.cn) ; Wang, Ying(ywang_2012@ciac.ac.cn) ; Feng, Shouhua(shfeng@jlu.edu.cn)
2022-08-01
Source PublicationJOURNAL OF ENERGY CHEMISTRY
ISSN2095-4956
Volume71Pages:129-140
AbstractThe electrocatalytic activity of transition-metal-based compounds is closely related to the electronic configuration. However, optimizing the surface electron spin state of catalysts remains a challenge. Here, we developed a spin-state and delocalized electron regulation method to optimize oxygen evolution reaction (OER) performance by in-situ growth of NiCo2(OH)(x) using Oswald ripening and coordinating etching process on MXene and plasma treatment. X-ray absorption spectroscopy, magnetic tests and electron paramagnetic resonance reveal that the coupling of NiCo2(OH)(x) and MXene can induce remarkable spin-state transition of Co3+ and transition metal ions electron delocalization, plasma treatment further optimizes the 3d orbital structure and delocalized electron density. The unique Jahn-Teller phenomenon can be brought by the intermediate spin state (t(2g)(5)e(g)(1)) of Co3+, which benefits from the partial electron occupied eg orbitals. This distinct electron configuration (t(2g)(5)e(g)(1)) with unpaired electrons leads to orbital degeneracy, that the adsorption free energy of intermediate species and conductivity were further optimized. The optimized electrocatalyst exhibits excellent OER activity with an overpotential of 268 mV at 10 mA cm(-2). DFT calculations show that plasma treatment can effectively regulate the d-band center of TMs to optimize the adsorption and improve the OER activity. This approach could guide the rational design and discovery of electrocatalysts with ideal electron configurations in the future. (C)& nbsp;2022 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by ELSEVIER B.V. and Science Press. All rights reserved.
KeywordTransition metal compounds

Electronic state control of surface/interface

Electron spin state Delocalized electron Electrocatalytic material
Funding OrganizationNational Natural Science Foundation of China ; Jilin Scientific and Technological Development Program ; Scientific Research Project in the Education Department of Jilin Province ; Project on Experimental Technique of Jilin University ; Users with the Excellence Program of Hefei Science Center CAS
DOI10.1016/j.jechem.2022.03.025
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[21801090] ; National Natural Science Foundation of China[21831003] ; National Natural Science Foundation of China[21621001] ; Jilin Scientific and Technological Development Program[20200802003GH] ; Scientific Research Project in the Education Department of Jilin Province[JJKH20211044KJ] ; Project on Experimental Technique of Jilin University[409020720202] ; Users with the Excellence Program of Hefei Science Center CAS[2020HSC-UE002]
WOS Research AreaChemistry ; Energy & Fuels ; Engineering
WOS SubjectChemistry, Applied ; Chemistry, Physical ; Energy & Fuels ; Engineering, Chemical
WOS IDWOS:000793730300013
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/174123
Collection中国科学院金属研究所
Corresponding AuthorWu, Xiaofeng; Wang, Ying; Feng, Shouhua
Affiliation1.Jilin Univ, Coll Chem, State Key Lab Inorgan Synth & Preparat Chem, Changchun 130012, Jilin, Peoples R China
2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China
3.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Liaoning, Peoples R China
4.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Rare Earth Resource Utilizat, Changchun 130022, Jilin, Peoples R China
Recommended Citation
GB/T 7714
Xu, Jingyao,Zhong, Xia,Wu, Xiaofeng,et al.

Optimizing the electronic spin state and delocalized electron of NiCo2(OH)(x)/MXene composite by interface engineering and plasma boosting oxygen evolution reaction

[J]. JOURNAL OF ENERGY CHEMISTRY,2022,71:129-140.
APA Xu, Jingyao,Zhong, Xia,Wu, Xiaofeng,Wang, Ying,&Feng, Shouhua.(2022).

Optimizing the electronic spin state and delocalized electron of NiCo2(OH)(x)/MXene composite by interface engineering and plasma boosting oxygen evolution reaction

.JOURNAL OF ENERGY CHEMISTRY,71,129-140.
MLA Xu, Jingyao,et al."

Optimizing the electronic spin state and delocalized electron of NiCo2(OH)(x)/MXene composite by interface engineering and plasma boosting oxygen evolution reaction

".JOURNAL OF ENERGY CHEMISTRY 71(2022):129-140.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Xu, Jingyao]'s Articles
[Zhong, Xia]'s Articles
[Wu, Xiaofeng]'s Articles
Baidu academic
Similar articles in Baidu academic
[Xu, Jingyao]'s Articles
[Zhong, Xia]'s Articles
[Wu, Xiaofeng]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Xu, Jingyao]'s Articles
[Zhong, Xia]'s Articles
[Wu, Xiaofeng]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.