Electrochemical performances of graphene nanoribbons
interlacing hollow NiCo oxide nanocages
Yanchun Hu a ng
Received: 26 August 2017 /Accepted: 16 November 2017
Springer Science+Business Media B.V., part of Springer Nature 2017
Abstract A hybrid of graphene nanoribbons (GNRs)
interlacing hollow NiCoO
(G-HNCO) nanocages in a
size range of 300~500 nm with rough surface is synthe-
sized by a chemical etching Cu
O templates and follow-
ed by GNR interlacing process. The G-HNCO showed
high electrochemical performance of oxygen evolution
reaction (OER), which exhibited small onset potential of
1.50 V and achieved current densities of 10 mA cm
potentials of 1.62 V. Also, the hybrid delivered high
capacitance of 937.8 F g
at 1 A g
(SC) tests as well as stable cycling performance in both
OER and SC measurements. The approach to synthesize
the hybrid is simple and scalable for other graphene
Keywords Graphene nanoribbons
Hollow nanoparticles with diverse hierarchical architec-
tures for their variety of applications in catalysis, sens-
ing, biomedicine, energy conversion, energy storage
systems, and so forth have aroused considerable inter-
ests in many areas of technology (MacLachlan et al.
2000; Lou et al. 2008; Matsusaki et al. 2012; Liu et al.
2010; Nai et al. 2013a, b;Wangetal.2012a, b; Wang
et al. 2002), since hollow interiors have increased the
contact area of the electrode/electrolyte interface and
provided more active sites for electrochemical reaction.
Moreover, the void space in the interior together with the
permeable thin walls provides sufficient electroactive
sites and electrolyte–electrode interface for fast diffusion
and reaction (Zhang et al. 2013;Xuetal.2014). In
general, there are two basic strategies—soft template or
hard template (e.g., micro-emulsions, gas bubbles, poly-
mer, carbon, and SiO
spheres) to achieve hollow struc-
ture. Among them, however, spherical hollow nanopar-
ticles have been the most common products (Lai et al.
2012; Huo et al. 2016).
Recently, an in situ sacrificial template method has
been introduced to efficiently prepare various hollow
nanostructures based on the well-known physical phe-
nomena Binside-out Ostwald ripening^ and the
BKirkendall effect^ (Sun and Xia 2002; Fan et al.
2007; Yin et al. 2004; Sang and Kang 2015; Guo et al.
JNanopartRes (2017) 19:387
Electronic supplementary material The online version of this
article (https://doi.org/10.1007/s11051-017-4078-1) contains
supplementary material, which is available to authorized users.
X. Li (*)
School of Materials Science and Engineering, Chongqing
University, Chongqing 400044, China
School of Materials Science and Engineering, Tianjin Key
Laboratory of Composite and Functional Materials, Tianjin
University, Tianjin 300072, China
School of Physics, Chongqing University, Chongqing 400044,