Abstract
The oxygen reduction reaction (ORR) of the fuel cells is a core of energy conversion, whereas its kinetics is slow due to the limitation of the activation energy barrier, which dramatically limits the commercial development of fuel cells. At present, the main electrocatalyst for the cathode oxygen reduction reaction of fuel cells is the platinum (Pt)-based catalyst. Still, as a precious metal, Pt has a high price, low reserves, and poor stability. These shortcomings seriously affect the mass production and commercialization of fuel cells. Therefore, there is an urgent need for the development of fuel cells to study a low price, sufficient production, high stability, and pollution-free non-Pt catalyst. The main research content of this paper is to use biomass sycamore ball as a carbon source, mixed with ferric chloride (III) hexahydrate and melamine, and prepare the carbon, nitrogen, and iron co-doped ORR catalyst by high-temperature calcination under a nitrogen atmosphere. The physical characterization and electrochemical testing of the obtained samples were conducted at room temperature. The results showed that the pretreatment of sycamore ball powder to iron ratio of 1:3 had the best catalytic performance.
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