▎ 摘　　要

NOVELTY - Method for preparing nickel-iron hydrotalcite nanosheet graphene electrocatalyst by adding deionized water to single-necked flask, adding agar powder, heating and stirring to boiling to obtain dispersed and transparent agar sol, and adding graphene oxide to the boiled hot melt, stirring, and pouring into beaker, taking nickel(II) nitrate hexahydrate and iron(III) nitrate nonahydrate, adding to the sol containing agar and reduced graphene oxide (rGO), stirring, transferring the sol to the plastic tube while it is hot, leaving it vertical until the sol is completely solidified, adding sodium hydroxide solution from the top of each plastic tube to fill the plastic tube and seal it with plastic wrap, cutting the plastic tube to take out the gel and dividing it into upper, middle and lower sections in units from top to bottom, and after combining the samples from the same section, washing several times with deionized water and centrifuging. USE - The method is used for the anode oxygen evolution reaction of alkaline electrolyzed water (claimed). ADVANTAGE - The method exhibits excellent catalytic performance for oxygen evolution reaction. DETAILED DESCRIPTION - Method for preparing nickel-iron hydrotalcite nanosheet graphene electrocatalyst by (i) adding 30 ml deionized water to 50 ml single-necked flask, adding agar powder, heating and stirring to boil to make the concentration 0.5-1.5%, and continuously boiling for 30 minutes to obtain a uniformly dispersed and transparent agar sol, and (ii) weighing a certain amount of graphene oxide (GO) and adding to the boiled hot melt, stirring to make it evenly dispersed, so that the content of graphene oxide is 0.07-0.13 mg/ml, and pouring it into a 50 ml beaker, taking nickel(II) nitrate hexahydrate and iron(III) nitrate nonahydrate in a molar ratio of 1-3:1, quickly adding to the sol containing agar and reduced graphene oxide (rGO), stirring to dissolve them to form a uniform sol, transferring the sol to the plastic tube while it is hot, so that the volume of the sol reaches 2/3 of the plastic tube, (iii) leaving it vertical until the sol is completely solidified, adding 42 mmol/l sodium hydroxide solution from the top of each plastic tube to fill the plastic tube and sealing it with plastic wrap, after 48 hours of natural permeation reaction, cutting the plastic tube to take out the gel and dividing it into upper, middle and lower sections in units of 10 mm from top to bottom, and after combining the samples from the same section, washing several times with N,N-dimethylformamide, washing away the agar several times with deionized water and absolute ethanol, and centrifuging to obtain the product.