4.3. Synthesis of CoP/CC, metal doped CoP and commercial
catalysts
The nanowire precursors obtained from the hydrothermal solution were
washed with deionized water and ethanol, which were dried in a vacuum
environment for 5 h. The precursors and 1 g
NaH2PO2 were put in two quartz boats and
placed in a tubular furnace, which was heated to 300 ℃ with suitable
heating rate (2 ℃/min) in Ar2 atmosphere (80 sccm) for 2
hours after gas washing process. For the configuration process of
commercial catalytic ink, 6 mg RuO2 and 6 mg Pt (20
ωt%)/C (80 ωt%) catalyst was placed in 1 ml isopropanol solution.
Subsequently, the above solution was placed in an ultrasonic cleaning
machine and fully dissolved for 1 hour. This was achieved by dropwise
addition of Nafion solution (15 μl) and ultrasonic process (5 min) to
obtain commercial catalytic ink. Finally, commercial catalytic ink was
dripped onto the CC surface (2 × 3 cm2), which was
subsequently used to compare the performance differences between Co
based catalysts and commercial catalysts.