Abstract:
The electrocatalyst Co
5Ni
1O
x/carbon cloth (CC) was synthesized by hydrothermal method. The microstructure, electrocatalytic performance of oxygen evolution reaction/hydrogen evolution reaction and water electrolysis property were studied, and compared with those of Co
6O
x/CC, Ni
6O
x/CC and commercial RuO
2 and Pt/C electrocatalysts. The results show that Co
5Ni
1O
x nanorods in Co
5Ni
1O
x/CC sample anchored on CC surface. When the current density was 10 mA·cm
-2, the overpotential of oxygen evolution reaction of Co
5Ni
1O
x/CC sample was 289 mV, significantly lower than 342,405,422 mV of Co
6O
x/CC sample, Ni
6O
x/CC sample and RuO
2 electrocatalyst; the overpotential of hydrogen evolution reaction was 200 mV, lower than 252,364 mV of Co
6O
x/CC sample and Ni
6O
x/CC sample and close to 44 mV of Pt/C electrocatalyst. The voltage of electrolytic cell assembled by Co
5Ni
1O
x/CC sample was 1.69 V, lower than 1.78, 1.85 V of electrolytic cell assembled by Co
6O
x/CC sample and Ni
6O
x/CC sample, respectively, and similar to 1.70 V of electrolytic cell assembled by RuO
2 and Pt/C electrocatalysts as anode and cathode, respectively.