期刊
SURFACES AND INTERFACES
卷 30, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.surfin.2022.101907
关键词
Graphene quantum dots; MXene; Heterojunction; Electrocatalyst; Hydrogen evolution reaction
类别
资金
- National Natural Science Foundation of China [11872171, 51802077]
- Fundamental Research Funds for the Central Universities [B210202093]
This study presents a robust and cost-effective approach to improve the hydrogen evolution performance by constructing a heterojunction of small-sized graphene quantum dots strongly coupled with ultrathin Ti3C2Tx MXene nanosheets.
Electrocatalytic hydrogen production is considered to be one of the cleanest hydrogen production pathways, while the development of advanced electrocatalysts with high activity and low cost is currently the biggest challenge in this field. Here, we report a robust and cost-effective approach to the construction of the 0D/2D heterojunctions made from small-sized graphene quantum dots strongly coupled with ultrathin Ti3C2Tx MXene nanosheets (GQDs/Ti3C2Tx) via a controllable assembly process. The newly-designed heterostructure provides unique structural advantages including large specific surface area, uniform dispersion of quantum dots with abundant active edge sites, desirable electronic structures, and good electronic conductivity, which endow the resulting GQDs/Ti3C2Tx catalyst with excellent hydrogen evolution properties with a low onset potential, a small Tafel slope, and long service life, which are significantly better than the bare quantum dots and Ti3C2Tx catalysts.
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