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It is found that with the increase in temperatures from 400 to 1 000 °C, ... (HPC) membrane as the electrode for SCs. The HPC was prepared by pyrolyzing the mixture composed of wood pulp-derived NCs ... [email protected]@NiCo 2 S 4 electrode possessed a high thickness of 800 µm (46.74 mg/cm 2) and a high areal mass loading of NiCo 2 S 4 (6.9 ...
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The as-prepared Ni-MOF@Pt exhibited excellent electrocatalysis behavior in 1 m KOH with an overpotential of 102 mV at 10 mA cm −2, outperforming that of the commercial Pt/C (Figure 2Ae-f). The strong Pt O covalent bonds in Ni-MOF@Pt are believed to enable ideal interfacial interaction and facilitate the electron transfer of the Pt ...
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Recent trends in the area of catalytic applications of metal-organic framework (MOF)-derived nanocarbons are covered. These highly porous nanostructures, convenient for the green chemistry processes, are generally formed by the direct carbonization of a variety of MOF, mainly MOF-5, ZIF-8, ZIF-67, UiO-66-NH2, MIL-101-NH2 at 700-1000 °C in argon or nitrogen flow. Differences between ...
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A subsequent sulfidation process is conducted for the Co-G-A YSSs with an appropriate amount of sulfur powder at 300 °C for 2 h with a slow heating rate of 1 °C min −1.From a broken nanosphere shown in Figure 1f, a yolk-shell structure can be clearly observed, which is further elucidated by TEM characterization (Figure 1g).EDX analysis validates the presence of Co, S, and N in the N-CoS ...
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Muhammad Bilal Tahir, ... Ghulam Nabi, in Chemistry of Nanomaterials, 2020. 11.4.3.2 Supercapacitors. Supercapacitors or ultracapacitors differ from conventional capacitors due to their fast charge-discharge rates, longer life cycle, high power, and high energy density [33].There are two types of supercapacitors depending on the charge storage. The first type is a double-layer electrical ...
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In addition, the peak power density could be as high as approximately 350 mW/cm 2, which is much higher than that of Pt/C (250 mW/cm 2), 31 and also much superior to those reported for Zn-air primary batteries. 40-43 Moreover, the excellent rechargeability of the Fe x Ni y N@C/NC was demonstrated by more than 400 discharge/charge cycles over ...
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をにした々のをいてきたことでられるが、2にあのの「ななつin」にることになりました。. がるのは、などにく12のコース。. のが11に、が ...
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Carbon electrodes are annealed at temperatures of over 300-400 °C to increase the stability of the film toward the liquid electrolytes used for DSSCs. ... CB-Pt, (c) TiN-CB, (d) CB-Gr ... images, while Figure 10d shows a transmission electron microscope (TEM) image of honeycomb porous carbon (HPC) . A HPC-based CE could exhibit a PCE ...
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