▎ 摘　　要

NOVELTY - Preparing single-atom platinum catalyst comprises (i) mixing glycine and hydrogen chloride, and adding deionized water to adjust the pH of the solution to 2-5, adding graphene oxide, and ultrasonically mixing, (ii) adding chloroplatinic acid aqueous solution and titanium tetrachloride to the mixed solution of step (i), ultrasonically dispersing, stirring, heating and reacting, and (iii) centrifuging the reaction solution in the step (ii), cleaning the precipitate, dispersing the precipitate with deionized water, freeze-drying, and finally annealing at high temperature to obtain single-atom platinum catalyst. USE - The catalyst is useful in hydrogen evolution reaction of water electrolysis in acidic medium (claimed). ADVANTAGE - The catalyst: has high catalytic activity and stability in acidic environment; reduces dosage of platinum in the commercial hydrogen evolution catalyst, and the cost; avoids the conductivity, active site rich and stable problem; and reduces the dosage of the platinum.