Journal
JOURNAL OF POWER SOURCES
Volume 385, Issue -, Pages 32-38Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2018.03.022
Keywords
Rhodium nanosheet nanoassemblies; Carbon nanotube; Polyallylamine-functionalized; Electrocatalysis; Hydrogen evolution reaction
Funding
- National Natural Science Foundation of China [21473111]
- National Training Program of Innovation and Entrepreneurship for Undergraduates [201710718012]
- Fundamental Research Funds for the Central Universities [GK201602002, 2016TS063, GK201701007]
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Rationally tailoring the surface/interface structures of noble metal nanostructures emerges as a highly efficient method for improving their electrocatalytic activity, selectivity, and long-term stability. Recently, hydrogen evolution reaction is attracting more and more attention due to the energy crisis and environment pollution. Herein, we successfully synthesize polyallylamine-functionalized rhodium nanosheet nanoassemblies-carbon nanotube nanohybrids via a facile one-pot hydrothermal method. Three-dimensionally branched rhodium nanosheet nanoassemblies are consisted of two dimensionally atomically thick ultrathin rhodium nanosheets. The as -prepared polyallylamine-functionalized rhodium nanosheet nanoassemblies-carbon nanotube nanohybrids show the excellent electrocatalytic activity for the hydrogen evolution reaction in acidic media, with a low onset reduction potential of -1 mV, a small overpotential of 5 mV at 10 mA cm(-2), which is much superior to commercial platinum nanocrystals. Two dimensionally ultrathin morphology of rhodium nanosheet, particular rhodium-polyallylamine interface, and three-dimensionally networks induced by carbon nanotube are the key factors for the excellent hydrogen evolution reaction activity in acidic media.
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