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For the success of a photosynthetic microalgae microbial fuel cell, a biocompatible, long-lived, and high catalytic cathode is crucial. Gadolinium-cobalt nanosheet arrays were coated on N-doped carbon spheres that had been enhanced with nickel foam to create a unique 3D hierarchical architecture of Gd-Co@N-CSs/NF cathode material in this study. Using a dual-chamber PMMFC unit with Chlorella vulgaris in the cathode chamber, the electricity production and stability of NF, N-CSs/NF, Co@N-CSs/NF, Co@N-Cs/NF, Co@N-NF, N-Che was evaluated in the catho The oxidation reduction reaction was demonstrated by the addition of Gd to the cathode material, resulting in improved catalytic efficiency for the oxygen reduction reaction, with an ORR peak potential of 0. 78 V. 115. 9 mW m-2 and a maximum circuit voltage of 614. 8 mV were produced by Gd-Co@N-CSs/NF, which was higher than the other three cathode materials. C. vulgaris cell density in the Gd-Co@N-CSs/NF system was much higher than those of NF, N-CSs/NF, and Co@N-CSs/NF.
Source link: https://europepmc.org/article/MED/35914594
In heat exchange and water conservation of cathode catalyst layers in polymer electrolyte fuel cells, gas diffusion layers play a key role. Electrocatalyst stress test studies are performed on membrane electrode assemblies made with three of the most commonly used GDLs in this study. In both nitrogen and air gas environments at 100% relative humidity, the effect of GDLs on electrocatalyst degradation is investigated. MEA with a cracked microporous layer in the GDL had a higher electrocatalyst loading loss, resulting in a smaller and more heterogeneous increase in the average electrocatalyst nanoparticle size.
Source link: https://europepmc.org/article/MED/35871500
catalyst Z 2 has a higher surface area compared to other synthesized catalysts, indicating the presence of a larger number of catalytic active sites and a larger number of redox-active sites, which supports excellent ORR results thanks to a higher number of redox-active sites. catalyst Z 2 with a potential of 483 mV and a reduction current of -0. 382 mA shows a higher electrocatalytic capacity and increased stability toward ORR compared to other synthesized catalysts and even the standard Pt/C catalyst, according to this report. Also, when catalyst Z2 is applied as an air-cathode ORR electrocatalyst for a single-chambered microbial fuel cell, the SC-MFC coated with catalyst Z 2 achieves the maximum power density of 416. 78 mW/m 2, which is 306% higher than that of SC-MFC coated with Pt/C.
Source link: https://europepmc.org/article/MED/35839174
The cathode must be constructed to maximize oxygen catalytic reduction, oxygen ion transport, electrical conductivity, and gas transport, according to a high-temperature fuel cell. The cathode must be mechanically stable to prevent cracking during fuel cell assembly and operation, in addition to the functional properties. The composite cathode's manufacturing process was optimized to satisfy such requirements in this research. Nickel, cerium oxide doped with samarium oxide, water, and an organic binder were mixed in the slurry for the green tape.
Source link: https://europepmc.org/article/MED/35888358
The solid oxide fuel cell, which converts chemical energy into electrical energy in a simple process, plays a vital role in the sustainable development initiative. The cell's polarization resistance was still poor at 0. 06 % humidified air after being tested at 800 °C for 120 hours. The polarization resistance of the cell increases by 2. 2 c10 cm 2 of the clean cell to 2. 18 u03a9 cm 2 after Cr-exposure testing. This increased tenacity and Cr-tolerance demonstrated by the Ba-doped LSCF cathode's improved chemical resistance and improved chemical stability compared to undoped LSCF.
Source link: https://europepmc.org/article/MED/35830498
The Schiff reaction created a new cobalt-chelating polyimine with an additional amine group. As the cathode catalyst for an anion exchange membrane fuel cell, A Co, N-co-doped carbon material obtained from two-stage calcination in different gas atmospheres is used as the cathode catalyst for an anion exchange membrane fuel cell. The maximum number of exchange electrons is 3. 81 on the LSV charts, with the exception of 1. 19-1. 37 V, the onset potential relative to RHE being 1. 19-1. 37 V. The half wave potential for the TSV curves is 1. 79-1. 37 V. The controlling factor of CoNC-1000A-900 is nearly identical to that of commercial 20 wt% Pt-deposited carbon particles, as the cathode catalyst hits 361 mW cm -2, which is higher than Pt/C.
Source link: https://europepmc.org/article/MED/35877902
Herein, we describe a novel perovskite-based BaFeO 3-u03b4 matrix as a highly active cathode for IT-SOFCs, in order to promote the widespread use of nonprecious metallic and cobalt-free oxygen reduction electrodes. The BSFY cathode is expected to be a promising cobalt-free alternative with increased CO2 resistance for IT-SOFCs, due to its reversible reaction between pure air and the contaminant.
Source link: https://europepmc.org/article/MED/35770419
In this research, covalent/metal organic framework and two-dimensional material were combined by a three-step distributed feed system for cathode catalysts in microbial fuel cells. On the Ti 3 AlC 2 substrate, irregular cube-like COF-300/ZIF-8 was discovered, which led to the growth of irregular cube-like COF-300/ZIF-8. The external output power density reached 587. 01 mW/m 2 at 1. 25 times of COF-300@Ti 3 AlC 2 -MFC and 1. 67 times of COF-300/ZIF-8-MFC. The Ti 3 AlC 2 enhanced the electrical conductivity of the composite by its many surface functional groups and more surface active sites.
Source link: https://europepmc.org/article/MED/35777647
By sol-gel technology, a series of Nd 0. 8-x-Sr 0. 2 Ca x CoO 3-u03b4 cathode materials was synthesized. When the Ca doping amount is greater than 0. 1, the results revealed that second phase NdCaCoO 4+ u03b4 is generated. The conductivity rises at first and then decreases, with a new Ca content increase, so the maximum value of 443 S cm -1 is at x = 0. 1 and T = 800 b0C. At 800 p. m. , Nd 0. 0976 - 0. 0976 u03b4 cm 2 shows the lowest area specific resistance of 0. 0976 u03b0C. At 800 octet B 00b0C, the maximum power density of Nd 0. 7 Sr 0. 2 Ca 0. 01 mW cm -2 is 409. 31 mW cm -2. The Ca-doped material exhibits good electrochemical stability under reduced coefficient of thermal expansion reduction, and therefore can be used as an intermediate-temperature SOFC cathode.
Source link: https://europepmc.org/article/MED/35765436
Since their good phase stability, electrocatalytic capacity, and low cost, Fe-based perovskite oxides, such as Ln 1-x Sr x FeO 3-u03b4, have been explored as alternative electrode materials for solid oxide fuel cells. This work explores the cathode effect of BaCO 3 nanoparticles modified on a cobalt-free La 0. 8 Sr 0. 2 O 2-u03b4 composite cathode at an intermediate temperature -SOFC. The modified LSF-GDC's K chem value rises by a factor of 17. 47, demonstrating that the oxygen reduction process is effectively enhanced after surface impregnation by BaCO 3 is enhanced after surface impregnation by BaCO 3. For about 100 h at 700 °C, single cells based on the modified cathode also demonstrated good results for about 100 h at 700 0C. This report reveals the functionality of BaCO 3 nanoparticles for improving IT-SOFC cathode materials.
Source link: https://europepmc.org/article/MED/35744498
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