Research prospects of graphene-based catalyst for seawater electrolysis

Abstract

Seawater has obvious resource reserve advantages compared to fresh water, and so the huge potential advantages for large-scale electrolysis of hydrogen production has been paid more attention to; but at the same time, electrolysis of seawater requires more stable and active catalysts to deal with seawater corrosion problems. Graphene-based materials are very suitable as composite supports for catalysts due to their high electrical conductivity, specific surface area, and porosity. Therefore, the review introduces the problems faced by seawater electrolysis for hydrogen production and the various catalysts performance. Among them, the advantages of catalysis of graphene-based catalysts and the methods of enhancement the catalytic performance of graphene are emphasized. Finally, the development direction of composite catalysts is prospected, hoping to provide guidance for the preparation of more efficient electrocatalysts for seawater electrolysis.as prospected, hoping to provide guidance for more efficient electrocatalysts for seawater electrolysis.

Mixed iridium-nickel oxides supported on antimony-doped tin oxide as highly efficient and stable acidic oxygen evolution catalysts

“…Hence, there is a pressing need for widespread deployment of renewable energy that can fulfil the society's energy demand, and concurrently reach the carbon-neutrality goals pledged by many countries worldwide. To this end, water electrolysis (WE) technologies and the associated electrocatalysts [3][4][5][6][7], have become increasingly important because they allow the surplus electricity obtained from intermittent renewable sources to be stored as hydrogen (commonly referred to as 'green' hydrogen) [8], which can then be dispensed upon demand. Among the low-temperature WE technologies developed so far, proton exchange membrane WE (PEM-WE) has shown many advantages over the more mature alkaline WE (AWE), such as much lower gas crossover and accordingly higher purity of hydrogen, ability to operate at high current densities with lower ohmic losses, faster response under fluctuating power input (typical of renewable energy), ease of being pressurised, and more compact designs [9,10].…”