The influence of sodium ion on the solid polymer electrolyte water electrolysis

The dynamic-state effects of sodium ion contamination on the solid polymer electrolyte water electrolysis

“…9(b) shows the changes of the anode and cathode outlet water pH values during the cathode poisoning. Similar to the cathode poisoning at high Na þ concentration (0.05 mol L À1 ) [20], the anode outlet water pH was stable during poisoning, and the cathode outlet pH deceased from 5.6 to 4.2 immediately and became stable from then on. The distribution of sodium ions is governed by both the electric filed and concentration gradient.…”

“…2. Different from high concentration (0.05 mol L À1 ) poisoning [20], the anode potential first increased and then decreased to a stable potential at low concentration of Na þ . As shown in Fig.…”

“…the SPE water electrolysis was studied [20]. Base on previous study results, high concentration of Na þ causes serious performance degradation to SPE water electrolyser, which mainly resulted from the cathodic overpotential increase.…”

Long-term contamination effect of iron ions on cell performance degradation of proton exchange membrane water electrolyser

“…Drawing on the research experience of fuel cells, a few works of cation ions contamination short time effect on PEM WE have been carried out. Zhang et al [34,35] found that anode Na + poisoning degrades the cell performance more severely than cathode, and the severity and poisoning rate depended on the Na + concentration [34,35]. Wang et al [19] studied the ferric ion contamination of solid polymer electrolyte water electrolysis, and the results showed that Fe 3+ ions degraded the cell performance greatly.…”

Behaviors of a proton exchange membrane electrolyzer under water starvation

“…There are many studies on the subject focused on the novel oxygen evolution reaction (OER) electrocatalyst 12,13 and metal cations poisoning. 14,15 However, no publication is available concerning the characters of PEM electrolyzer under the water starvation. By means of investigating the behaviors under the water starvation, this work will help to identify the cause of the performance degradation and optimize the water amount for a water electrolyzer operation.…”