• 文献标题:   Complementary combinative strategy of defect engineering and graphene coupling for efficient energy-functional materials
  • 文献类型:   Article
  • 作  者:   KIM M, PARK YH, KIM MH, JIN XY, HWANG SJ
  • 作者关键词:   defect engineering, amorphous nanocrystal, graphene, hydrogen evolution electrocatalyst, sodium ion batterie
  • 出版物名称:   CHEMISTRYAN ASIAN JOURNAL
  • ISSN:   1861-4728 EI 1861-471X
  • 通讯作者地址:  
  • 被引频次:   1
  • DOI:   10.1002/asia.202101013 EA OCT 2021
  • 出版年:   2021

▎ 摘  要

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.