3 results about "Formic acid fuel cell" patented technology

The invention provides an NC loaded Rh monatomic and Dy2O3 catalyst and a preparation method and application thereof.The preparation method comprises the steps that zinc nitrate, an Rh precursor and a Dy precursor are dissolved in methyl alcohol, ultrasonic dispersion is conducted, and a solution A is obtained; dissolving 2-methylimidazole in methanol, and carrying out ultrasonic dispersion to obtain a solution B; mixing the solution A and the solution B, carrying out hydrothermal reaction on the obtained mixed solution, cooling, centrifuging, collecting nanocrystals, and washing with methanol to obtain RhDy ZIF-8; and roasting the RhDy ZIF-8, cooling, and grinding to obtain the Dy2O3-Rh / NC catalyst. According to the NC-loaded Rh single atom and Dy2O3 composite material obtained by the method, high-dispersion single atom activity is maintained, and meanwhile, Dy2O3 and Rh single atoms cooperate to endow a catalyst with excellent CO poisoning resistance and FAOR resistance through unique oxyphilicity of Dy2O3, so that the NC-loaded Rh single atom and Dy2O3 composite material shows huge application potential in high-concentration formic acid fuel cells.

This invention discloses a palladium-based alloy catalyst, its preparation method, and its application in formic acid fuel cells, belonging to the field of palladium catalyst electrocatalysis technology. The catalyst prepared by this invention is a ruthenium-doped two-dimensional palladium-based alloy catalyst, which has an ordered mesoporous two-dimensional nanosheet structure. In the preparation process, dodecyltriruthenium is selected as the ruthenium source. Under heating conditions, it decomposes to form CO, which acts as a structure directing agent, inducing the formation of two-dimensional nanosheets and effectively inhibiting the aggregation of metal atoms. During this process, the interaction between palladium and ruthenium metal atoms leads to the formation of ordered mesopores in the catalyst. The surface morphology of the catalyst can be flexibly controlled by controlling the amount of ruthenium metal atoms incorporated. The obtained catalyst exhibits excellent formic acid oxidation performance.

This invention discloses an anode catalyst for high-concentration formic acid fuel cells, and for the first time synthesizes a three-dimensional Pt / Bi₂Te₃ nanocomposite material with a width of 600–900 nm and a thickness of 55–80 nm. Its performance at 0.1 mol / L... ‑1 Perchloric acid and 3.0 mol L ‑1 The mass activity of formic acid oxidation in a mixed formic acid solution is 8.2 A mg. ‑1 The surface activity is 11.8 mA cm⁻¹. ‑2 These figures are 15.7 and 13.1 times higher than those of commercially available carbon-supported platinum, respectively. In stability testing, the three-dimensional Pt / Bi₂Te₃ nanocomposite exhibited a residual activity of 1.33 A mg after a 3600 s iterative test. ‑1 It is 221.6 times that of commercial Pt / C. At 15.0 mol L⁻¹ ‑1 In a practical direct formic acid fuel cell using formic acid as fuel, the peak power density of the three-dimensional Pt / Bi₂Te₃ nanocomposite material is 156.1 mW / cm². ‑2 The peak power density of commercially available carbon-supported platinum is only 77.0 mW / cm². ‑2 .