TY - JOUR
T1 - Interconnected phosphorus-doped CoO-nanoparticles nanotube with three-dimensional accessible surface enables high-performance electrochemical oxidation
AU - Hu, Qi
AU - Zhu, Bin
AU - Li, Guomin
AU - Liu, Xiufang
AU - Yang, Hengpan
AU - Sewell, Chris D.
AU - Zhang, Qianling
AU - Liu, Jianhong
AU - He, Chuanxin
AU - Lin, Zhiqun
N1 - Publisher Copyright:
© 2019
PY - 2019/12
Y1 - 2019/12
N2 - The ability to create nanomaterials with hollow micro- or nanostructures renders their applications in fields such as catalysis, controlled delivery and lightweight composites. Herein, we report a simple three-step route to Cu2O/Cu nanotubes populated by interconnected, phosphorus-doped CoO nanoparticles (denoted P–CoO–Cu2O/Cu-NTs). They possess three-dimensional (3D) accessible surface, thereby greatly favoring the exposure of active sites and electrolyte transport for efficient electrocatalysis. Notably, the integrated electrochemical tests and theoretical calculation reveal that the P-doping imparts the optimization of the electronic structures of CoO, enhancing its conductivity, facilitating the in-situ formation of active CoOOH species during oxygen evolution reaction (OER), and suitably regulating free energy for adsorption of the OER intermediates. Consequently, the P–CoO–Cu2O/Cu-NTs exhibit outstanding performance for OER and urea oxidation reaction (UOR) with the overpotential of 261 mV and potential of 1.43 V vs RHE, respectively, at 10 mA cm−2, outperforming most of non-precious metal electrocatalysts and RuO2. As such, the three-step approach involving the use of Cu nanowires as template to yield Cu2O/Cu nanotubular yet porous scaffold may stand out as a robust strategy for judicious crafting of interconnected heteroatom-doped metal oxides for high-performance electrocatalysis.
AB - The ability to create nanomaterials with hollow micro- or nanostructures renders their applications in fields such as catalysis, controlled delivery and lightweight composites. Herein, we report a simple three-step route to Cu2O/Cu nanotubes populated by interconnected, phosphorus-doped CoO nanoparticles (denoted P–CoO–Cu2O/Cu-NTs). They possess three-dimensional (3D) accessible surface, thereby greatly favoring the exposure of active sites and electrolyte transport for efficient electrocatalysis. Notably, the integrated electrochemical tests and theoretical calculation reveal that the P-doping imparts the optimization of the electronic structures of CoO, enhancing its conductivity, facilitating the in-situ formation of active CoOOH species during oxygen evolution reaction (OER), and suitably regulating free energy for adsorption of the OER intermediates. Consequently, the P–CoO–Cu2O/Cu-NTs exhibit outstanding performance for OER and urea oxidation reaction (UOR) with the overpotential of 261 mV and potential of 1.43 V vs RHE, respectively, at 10 mA cm−2, outperforming most of non-precious metal electrocatalysts and RuO2. As such, the three-step approach involving the use of Cu nanowires as template to yield Cu2O/Cu nanotubular yet porous scaffold may stand out as a robust strategy for judicious crafting of interconnected heteroatom-doped metal oxides for high-performance electrocatalysis.
KW - Nanotubes
KW - Oxygen evolution reaction
KW - Phosphorus doping
KW - Three-dimensional accessible surface
KW - Urea oxidation reaction
UR - http://www.scopus.com/inward/record.url?scp=85074433045&partnerID=8YFLogxK
U2 - 10.1016/j.nanoen.2019.104194
DO - 10.1016/j.nanoen.2019.104194
M3 - Article
AN - SCOPUS:85074433045
SN - 2211-2855
VL - 66
JO - Nano Energy
JF - Nano Energy
M1 - 104194
ER -