TY - JOUR
T1 - NiCo2O4 nanosheets grown on current collectors as binder-free electrodes for hydrogen production via urea electrolysis
AU - Wang, Dan
AU - Vijapur, Santosh H.
AU - Wang, Yuxuan
AU - Botte, Gerardine G.
N1 - Funding Information:
The authors would like to thank the financial support from the Center for Electrochemical Engineering Research (CEER) at Ohio University and the National Science Foundation through the Major Research Instrumentation Grant # CBET-1126350.
Publisher Copyright:
© 2016 Hydrogen Energy Publications LLC
PY - 2017/2/16
Y1 - 2017/2/16
N2 - As a novel solid hydrogen carrier, urea (CO(NH2)2) has shown great promise in hydrogen production, hydrogen storage and transportation. Mesoporous NiCo2O4 nanosheets were synthesized on current collectors and evaluated as binder free electrodes for hydrogen production via urea electrolysis. The as-grown NiCo2O4 nanosheet electrodes with 0.6 mg cm−2 catalyst loading exhibit ca. 80 mV decreasing in the onset potential of urea oxidation in alkaline solution comparing to those of bulk nickel hydroxide modified electrodes. The NiCo2O4 nanosheet electrodes also improved the urea oxidation current density by at least 28 times at a constant potential of 0.50 V vs. Hg/HgO compared to that of bulk Ni(OH)2 electrodes. The enhanced electrocatalytic performances of the binder free NiCo2O4 nanosheet electrodes may bring new opportunities for the scale-up of the urea electrolysis technology, which will benefit energy and environmental issues, such as urea-rich wastewater treatment, hydrogen production, and fuel cells.
AB - As a novel solid hydrogen carrier, urea (CO(NH2)2) has shown great promise in hydrogen production, hydrogen storage and transportation. Mesoporous NiCo2O4 nanosheets were synthesized on current collectors and evaluated as binder free electrodes for hydrogen production via urea electrolysis. The as-grown NiCo2O4 nanosheet electrodes with 0.6 mg cm−2 catalyst loading exhibit ca. 80 mV decreasing in the onset potential of urea oxidation in alkaline solution comparing to those of bulk nickel hydroxide modified electrodes. The NiCo2O4 nanosheet electrodes also improved the urea oxidation current density by at least 28 times at a constant potential of 0.50 V vs. Hg/HgO compared to that of bulk Ni(OH)2 electrodes. The enhanced electrocatalytic performances of the binder free NiCo2O4 nanosheet electrodes may bring new opportunities for the scale-up of the urea electrolysis technology, which will benefit energy and environmental issues, such as urea-rich wastewater treatment, hydrogen production, and fuel cells.
KW - Binder free electrodes
KW - Hydrogen production
KW - NiCoO nanosheet
KW - Urea electrolysis
KW - Wastewater treatment
UR - http://www.scopus.com/inward/record.url?scp=85011969715&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2016.11.048
DO - 10.1016/j.ijhydene.2016.11.048
M3 - Article
AN - SCOPUS:85011969715
VL - 42
SP - 3987
EP - 3993
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
SN - 0360-3199
IS - 7
ER -