期刊
ADVANCED MATERIALS
卷 30, 期 31, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201800676
关键词
alkaline media; carbon quantum dots; electrocatalysis; hydrogen evolution; ruthenium nanoparticles
类别
资金
- National Science Foundation of China (NSFC) [51433003, 51373065, 21504029]
- National key research and development program of China [2016YFB0401701]
- JLU Science and Technology Innovative Research Team [2017TD-06]
- National Natural Science Foundation of China [51473149, 20804040]
- supports plan for college science and technology innovation team of Henan province [16IRTSTHN001]
- Science & Technology Innovation Talent Plan of Henan Province [174200510018]
Highly active, stable, and cheap Pt-free catalysts for the hydrogen evolution reaction (HER) are facing increasing demand as a result of their potential use in future energy-conversion systems. However, the development of HER electrocatalysts with Pt-like or even superior activity, in particular ones that can function under alkaline conditions, remains a significant challenge. Here, the synthesis of a novel carbon-loaded ruthenium nanoparticle electrocatalyst (Ru@CQDs) for the HER, using carbon quantum dots (CQDs), is reported. Electrochemical tests reveal that, even under extremely alkaline conditions (1 M KOH), the as-formed Ru@CQDs exhibits excellent catalytic behavior with an onset overpotential of 0 mV, a Tafel slope of 47 mV decade(-1), and good durability. Most importantly, it only requires an overpotential of 10 mV to achieve the current density of 10 mA cm(-2). Such catalytic characteristics are superior to the current commercial Pt/C and most noble metals, non-noble metals, and nonmetallic catalysts under basic conditions. These findings open a new field for the application of CQDs and add to the growing family of metal@CQDs with high HER performance.
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