Add time:07/31/2019         Source:sciencedirect.com

SummaryIron-nickel oxy/hydroxide (FeNiOx) films are widely known to mediate the oxygen evolution reaction efficiently at modest current densities (10 mA/cm2). We report here the electrochemical stability and metal composition of these electrocatalyst films when subjected to sustained electrolysis in strong base at 200 mA/cm2, conditions that are better aligned with practical commercial-scale electrolysis. We found that most of the iron in the film was liberated during the first 24 hr of electrolysis and deposited on the cathode. We confirmed these observations by interrogating the relative metal content of the electrodes before and after electrolysis by using X-ray fluorescence, energy-dispersive X-ray, and X-ray photoelectron spectroscopies. The rate at which iron was leached from FeNiOx anodes was reduced at 10 mA/cm2 but was still significant. These results highlight that one must account for the instability of this mixed-metal composition when drawing structure-property relationships and when considering the scale-up of electrocatalysts.

We also recommend Trading Suppliers and Manufacturers of IRON NICKEL OXIDE (cas 12168-54-6). Pls Click Website Link as below: cas 12168-54-6 suppliers