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Complementary combinative strategy of defect engineering and graphene coupling for efficient energy-functional materials
- Title
- Complementary combinative strategy of defect engineering and graphene coupling for efficient energy-functional materials
- Authors
- Kim, Minji; Park, Yeon Hu; Kim, Myung Hwa; Jin, Xiaoyan; Hwang, Seong-Ju
- Ewha Authors
- 김명화
- SCOPUS Author ID
- 김명화
- Issue Date
- 2021
- Journal Title
- CHEMISTRY-AN ASIAN JOURNAL
- ISSN
- 1861-4728
1861-471X
- Citation
- CHEMISTRY-AN ASIAN JOURNAL vol. 16, no. 23, pp. 3937 - 3943
- Keywords
- defect engineering; amorphous nanocrystal; graphene; hydrogen evolution electrocatalyst; sodium ion batteries
- Publisher
- WILEY-V C H VERLAG GMBH
- Indexed
- SCIE; SCOPUS
- Document Type
- Article
- Abstract
- The synergetic combination of defect engineering and graphene coupling enables to develop an effective way of exploring efficient bifunctional electrocatalyst/electrode materials. Defect-engineered amorphous MoO2-reduced graphene oxide (rGO) nanohybrid was synthesized by soft-chemical reduction of K2MoO4 in graphene oxide colloids. Mo K-edge X-ray absorption spectroscopy clearly demonstrates the rutile-type local atomic structure of amorphous MoO2 with significant oxygen vacancies and intimate electronic coupling with rGO. The defect-introduced MoO2-rGO nanohybrid shows excellent bifunctionality as electrocatalyst for hydrogen evolution reaction and electrode for sodium-ion batteries, which are superior to those of crystalline MoO2-rGO homologue. The beneficial effect of simultaneous defect control and rGO coupling can be ascribed to the provision of oxygen vacancies acting as active sites, the increase of electrical conductivity, and the improvement of reaction kinetics.
- DOI
- 10.1002/asia.202101013
- Appears in Collections:
- 자연과학대학 > 화학·나노과학전공 > Journal papers
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