Hydrogen evolution and oxygen evolution electrocatalysts in membrane electrodes are very important for the entire water electrolysis hydrogen production reaction. Ideal electrocatalysts should have the characteristics of corrosion resistance, good specific surface area, porosity, catalytic activity, electronic conductivity, electrochemical stability, low cost and environmental friendliness. Cathodic hydrogen evolution electrocatalysts are in a strong acidic working environment, prone to corrosion, agglomeration, loss and other problems. In order to ensure the performance and life of the electrolytic cell, the hydrogen evolution catalyst materials are mainly selected Pt precious metals and their Pt-Ru alloys that are resistant to corrosion. Compared with the cathode, the anode polarization is more prominent, which is an important factor affecting the hydrogen production efficiency of PEM water electrolysis. Among them, platinum carbon black catalysts have better activity and stability; however, Pt-Ru alloys are also alloyed electrocatalysts with more applications, which increase the specific surface area of catalyst activity, improve the mechanical strength and chemical stability of the catalyst.

physicochemical parameters