Hydrogen produced from water electrolysis can play a significant role as energy storage. Electrolysis can support the electricity grid in terms of power quality, frequency and voltage control, peak shaving, load shifting and demand response. The overall objective of the HPEM2GAS project is to develop, validate and demonstrate robust, flexible and rapid-response self-pressurising PEM electrolyser technology based on advanced cost-effective components and using novel solutions for interfacing to the grid. Membrane-electrode assemblies (MEAs) designed for polymer electrolyte membrane (PEM) water electrolysis, based on a novel short-side chain (SSC) perfluorosulfonic acid (PFSA) membrane, Aquivion®, with various cathode and anode noble metal loadings, were investigated in terms of both performance and durability. Utilizing a nanosized Ir0.7Ru0.3Ox solid solution anode catalyst and a supported Pt/C cathode catalyst, in combination with the Aquivion® membrane, gave excellent electrolysis performances exceeding 3.2 A·cm-2 at 1.8 V terminal cell voltage (~80 % efficiency) at 90 °C in the presence of a total catalyst loading of 1.6 mg?cm-2. A very small loss of efficiency, corresponding to 30 mV voltage increase, was recorded at 3 A?cm-2 using a total noble metal catalyst loading of less than 0.5 mg·cm-2 (compared to the industry standard of 2 mg·cm-2). Steady-state durability tests, carried out for 1000 h at 1 A?cm-2, showed excellent stability for the MEA with total noble metal catalyst loading of 1.6 mg·cm-2 (cell voltage increase ~5 ?V/h).
Performance and durability of advanced materials for water splitting in a PEM electrolyser in the HPEM2GAS project
S Siracusano;V Baglio;
2016
Abstract
Hydrogen produced from water electrolysis can play a significant role as energy storage. Electrolysis can support the electricity grid in terms of power quality, frequency and voltage control, peak shaving, load shifting and demand response. The overall objective of the HPEM2GAS project is to develop, validate and demonstrate robust, flexible and rapid-response self-pressurising PEM electrolyser technology based on advanced cost-effective components and using novel solutions for interfacing to the grid. Membrane-electrode assemblies (MEAs) designed for polymer electrolyte membrane (PEM) water electrolysis, based on a novel short-side chain (SSC) perfluorosulfonic acid (PFSA) membrane, Aquivion®, with various cathode and anode noble metal loadings, were investigated in terms of both performance and durability. Utilizing a nanosized Ir0.7Ru0.3Ox solid solution anode catalyst and a supported Pt/C cathode catalyst, in combination with the Aquivion® membrane, gave excellent electrolysis performances exceeding 3.2 A·cm-2 at 1.8 V terminal cell voltage (~80 % efficiency) at 90 °C in the presence of a total catalyst loading of 1.6 mg?cm-2. A very small loss of efficiency, corresponding to 30 mV voltage increase, was recorded at 3 A?cm-2 using a total noble metal catalyst loading of less than 0.5 mg·cm-2 (compared to the industry standard of 2 mg·cm-2). Steady-state durability tests, carried out for 1000 h at 1 A?cm-2, showed excellent stability for the MEA with total noble metal catalyst loading of 1.6 mg·cm-2 (cell voltage increase ~5 ?V/h).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
