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.