4.6 Article

A nickel nanoparticle/carbon quantum dot hybrid as an efficient electrocatalyst for hydrogen evolution under alkaline conditions

期刊

JOURNAL OF MATERIALS CHEMISTRY A
卷 3, 期 36, 页码 18598-18604

出版社

ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ta04867b

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资金

  1. Collaborative Innovation Center of Suzhou Nano Science and Technology
  2. National Basic Research Program of China (973 Program) [2012CB825803, 2013CB932702]
  3. National Natural Science Foundation of China [51422207, 51132006, 21471106]
  4. Specialized Research Fund for the Doctoral Program of Higher Education [20123201110018]
  5. Suzhou Planning Project of Science and Technology [ZXG2012028]
  6. Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)

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The exploration of an efficient electrocatalyst for hydrogen evolution reaction (HER) from water is a key to relieve the energy crisis, which is a great challenge. Herein, a nickel nanoparticle/carbon quantum dot (Ni/CQD) hybrid is synthesized and evaluated as an electrocatalyst for HER under a strongly alkaline medium (1 M KOH solution). The obtained Ni/CQD hybrid shows good catalytic ability for HER with an onset potential comparable to that of Pt wire and a low Tafel slope of 98 mV dec(-1), which may be attributed to the Ni-O-C interface between Ni NPs and CQDs. The Ni/CQDs also exhibit high stability after 1000 CV cycles with negligible current loss (around 1 mA cm(-2)). Moreover, the catalytic ability of Ni/CQDs can be further improved under visible light illumination, suggested by a lower Tafel slope of 77 mV dec(-1).

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