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One of the most pressing issues for mega-cities and densely populated areas is proton exchange membrane fuel cell based transportation systems. However, the primary unsolved issue in materials technology is the poor redox stability of the carbon supports in highly oxidizing/reducing fuel cell working conditions, limiting the widespread use of PEMFC. PEMFC catalyst catalysts used in this work have been proving to many years in electrical double layer supercapacitors under very high current density pulsation pressures for many years. In the last years, the synthesis techniques for carbide derived carbon C, [1, 2] and carbon nanosphere [8, 2] and the synthesis methods for synthesis methods for carbon [1, 2] and Ru-[1, 2] and Ru-C, C, [1, 2] and [1, 2] and C, C [1, 2] and C [1, 2] The carbon materials have been tested by small angle neutron scattering techniques and variable shape of pores have been demonstrated . The degradation of catalytic activity after 30 cycles was moderate, according to the rotating disk electrode results. The assembled single cells showed excellent cyclability and high catalytic activity, resulting in greater yield and higher catalytic activity, providing a better result than those based on the traditional Vulcan electrode materials. Acknowledgements This work was funded by Estonian Target research project No. 234. T. Thomberg, T. Tooming, T. Romann, R. Palm, A. Jänes, E. Lust, J. Electrochem. Siebenbürger, T. Romann, T. Lust, Carbon 100 617-624. Sepp, E. Härk, P. Valiants, J. Nerut, P. Sepp, E. Härk, P. Vadern, K. Valiants, J. Nerut, J. Nerut, R. Kurig, J. Nerut, P. Nessina, M. Gra, B. Sepp, E. Lust, T.
Source link: https://doi.org/10.1149/ma2016-02/38/2539
As catalysts for catalysts activated with platinum nanoclusters, microporous-mesoporous carbon materials synthesized from molybdenum and tungsten carbides by high-temperature chlorination process were used as support for catalysts developed with platinum nanoclusters. The results were compared to those for carbon material synthesized from D-glucose by hydrothermal carbonization followed by additional chemical activation with CO 2. Platinum has been applied to porous carbon particles in the form of nanoparticles or nanoparticle agglomerates of nanoparticles.
Source link: https://doi.org/10.1149/07514.0777ecst
The method is used to produce ultrafine CoSe 2 nanocrystal@N-doped carbon matrix confined within HMCSs for use as advanced anodes in high-performance potassium-ion batteries. Thermal treatment under vacuum aids the infiltration of the cobalt precursor and organic linker into the HMCS and then converts them into stable ZIF-67 particles without any solvents. The “dual confinement system,” made up of both the organic linker's and HMCS' small-sized pores, can effectively reduce CoSe 2 nanocrystal growth during the subsequent selenization process, can also reduce CoSe 2 nanocrystal growth.
Source link: https://doi.org/10.1007/s40820-020-00539-6
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