TY - JOUR
T1 - A novel nickel-based honeycomb electrode with microtapered holes and abundant multivacancies for highly efficient overall water splitting
AU - Zhang, Fan
AU - Ji, Renjie
AU - Liu, Yonghong
AU - Pan, Yuan
AU - Cai, Baoping
AU - Li, Zhijian
AU - Liu, Zheng
AU - Lu, Shuaichen
AU - Wang, Yating
AU - Jin, Hui
AU - Ma, Chi
AU - Wu, Xinlei
N1 - Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/11/5
Y1 - 2020/11/5
N2 - Hydrogen production is the key to the development and utilization of hydrogen energy. In this paper, we find a new phenomenon in which abundant and uniform bubbles evolve and quickly release during water splitting on the surface of a nickel-based honeycomb electrode with microtapered holes (NHEMH). Benefiting from the unique microtapered hole honeycomb structure, the solution circulation on the surface of NHEMH is accelerated, thus generating a dynamically stabilized reactive interface and improving the ionic/mass exchange. Meanwhile, the unique honeycomb skeleton has good hydrophilicity and aerophobic properties. Furthermore, NHEMH with a large surface area, rich multi-vacancies, and highly conductive nickel metal exhibits an outstanding electrocatalytic ability. P-doped NHEMH (PNHEMH) with the Ni2P/NiO heterointerface decorated by multivacancies, when used as an electrolyzer for overall water splitting, requires only 1.52 V to produce a current density of 10 mA/cm2, which is much better than the performance of benchmark Pt/C//IrO2 electrodes.
AB - Hydrogen production is the key to the development and utilization of hydrogen energy. In this paper, we find a new phenomenon in which abundant and uniform bubbles evolve and quickly release during water splitting on the surface of a nickel-based honeycomb electrode with microtapered holes (NHEMH). Benefiting from the unique microtapered hole honeycomb structure, the solution circulation on the surface of NHEMH is accelerated, thus generating a dynamically stabilized reactive interface and improving the ionic/mass exchange. Meanwhile, the unique honeycomb skeleton has good hydrophilicity and aerophobic properties. Furthermore, NHEMH with a large surface area, rich multi-vacancies, and highly conductive nickel metal exhibits an outstanding electrocatalytic ability. P-doped NHEMH (PNHEMH) with the Ni2P/NiO heterointerface decorated by multivacancies, when used as an electrolyzer for overall water splitting, requires only 1.52 V to produce a current density of 10 mA/cm2, which is much better than the performance of benchmark Pt/C//IrO2 electrodes.
KW - Honeycomb electrode
KW - Microtapered holes
KW - Multiple vacancies
KW - Phosphorization
KW - Water splitting
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U2 - 10.1016/j.apcatb.2020.119141
DO - 10.1016/j.apcatb.2020.119141
M3 - Article
AN - SCOPUS:85085582445
SN - 0926-3373
VL - 276
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
M1 - 119141
ER -