3results about How to "Improve electrode performance" patented technology

The application discloses an air electrode and application thereof, and belongs to the field of solid oxide batteries. The air electrode is formed by sintering an air electrode precursor in a CO2 atmosphere, and is a composite electrode of microparticles and nanoparticles. The size of the nanoparticles is 10-100 nm, the size of the microparticles is 0.5-2 microns, and the nanoparticles are uniformly dispersed on the surface of the microparticles. The composition of the air electrode precursor is Ba 1‑x N x Co 1‑m‑n Fe m M n O 3‑d , 0 < x < 0.5, 0 < n < 0.2, 0 < m < 0.3, 0 < d < 0.5, N is one or more than two of Sr, Mg, Ca, K and Na, and M is one or more than two of Sc, Zr, Nb, Ce, Y and Yb. The air electrode has excellent oxygen reduction and oxygen evolution reaction activity, and shows outstanding electrochemical performance in fuel cell power generation, hydrogen production by water vapor electrolysis and synthetic gas preparation by electrolysis.

This invention belongs to the field of new energy fuel cell technology, and specifically relates to an anode catalyst with anti-reverse polarity, its preparation method, slurry, and fuel cell. The catalyst includes a support and a Pt-Ru alloy and IrO2 supported on the support, wherein the support is a carbon material support; the particle size of the anti-reverse polarity anode catalyst is 3-5 nm. Addressing the technical deficiencies of existing anti-reverse polarity anode catalysts, this invention proposes an improved anti-reverse polarity anode catalyst. This catalyst uses a carbon material support with superior conductivity and mass transfer capacity compared to metal oxide supports such as TiO2, ZrO2, WO3-Mn, and Nb-TiO2. IrO2, which has high anti-reverse polarity performance, is co-supported with the metal active component Pt-Ru alloy on the carbon material support. The resulting anti-reverse polarity anode catalyst, when applied to a fuel cell, exhibits a reverse polarity time of 171 min and an electrode performance of 1.40 A / cm² after reverse polarity. 2 In addition, this anode catalyst also exhibits excellent resistance to CO poisoning.

This application relates to the field of electrocatalysts and their preparation technology, specifically to a phosphorus-doped cobalt-molybdenum alloy electrode, its preparation method, and its application. This application solves the problem of low Faradaic efficiency and yield in existing electrocatalytic conversion of nitrate to ammonia. The catalyst for nitrate-to-ammonia reduction with a nanosheet structure obtained by phosphating a sample prepared from a Co and Mo composite exhibits excellent Faradaic efficiency and yield in nitrate-to-ammonia reduction. Test results show that the prepared P-CoMo / NF nanoalloy catalyst achieves an ammonia yield as high as 13700.49 μg h⁻¹ in a mixed solution of 1 mol / L KOH and 0.1 mol / L KNO₃ at -0.5 V vs. RHE. ‑1 cm ‑2 The Faraday efficiency remained at 91.69%. Furthermore, the ammonia yield and Faraday efficiency remained stable over 10 cycles at -0.5V vs. RHE.