期刊
ACS APPLIED ENERGY MATERIALS
卷 2, 期 12, 页码 8502-+出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.9b01434
关键词
transition metal nitride; graphene oxide; Prussian blue analogue; oxygen evaluation reaction; electrocatalysis
资金
- World Class 300 Project (RAMP
- D) of the MOTIE, MSS (Korea) [S2561932]
- Ministry of Trade
- Industry and Energy through Technology Innovation Program [10067449]
- Korea Technology & Information Promotion Agency for SMEs (TIPA) [S2561932] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
We report successfully synthesizing two-dimensional (2D) and nanocrystalline (NC) Fe2Ni2N/rGO nanohybrid sheets (NHSs) via ammonolysis of as-prepared 2D Ni2.25Fe0.75[Fe(CN)(6)](2)/rGO precursors. We compared the electrochemical properties of the 2D-NC Fe2Ni2N/rGO NHSs as non-precious-metal nitride and graphene nanohybrid electrocatalysts for an oxygen evolution reaction (OER) with those of NiFe-based composition. The overpotential and Tafel plot of the 2D-NC Fe2Ni2N/rGO NHSs had their lowest values of 290 and 49.1 mV dec(-1), respectively, at a current density of 10 mA cm(-2) (0.1 M, KOH). The 2D-NC Fe2Ni2N/rGO NHS catalyst was stable under OER conditions, and X-ray photoelectron spectroscopy and scanning transmission electron microscopy confirmed the stability of the catalysts after electrochemical testing (24 h). The synergistic interactions between the transition-metal nitride and graphene represent unique 2D nanostructured, metallic properties, and graphene sheets with nanocrystalline Fe2Ni2N on them are significantly more efficient and active electrocatalysts. The presented strategy of transition-metal nitride/graphene hybrid nanostructures provides potential for more efficient and outstanding OER electrocatalysts.
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