Catalysts with surface-modified carbon blacks

Figure 3.18 Catalysts with surface-modified carbon blacks show enhanced proton and electron conduction [89],...

AC, carbon black and aerogel are the first carbon aUotropes tested on supercapacitors and used in industrial type supercapacitor cells. To improve capacitive properties of EDLCs, their carbon-Uke nanostmeture electrodes are modified with electroactive materials. This modification leads to accumulation of additional charge on the electrode surface and improved the capacitance. The carbon materials have been used as additives, catalyst for electron transfer, hosts for intercalation of ions, substrates for electrode materials, and electrodes for energy storage devices [39 1]. ACs have been used with PEDOT as composite for the enhancement of capacitance of supercapacitor cells. Activated carbon/CPs are also used in asymmetric supercapacitors [42-44]. 

The object of the present study was to use in the above mentioned hydrogenations improved carbon supported catalysts, which could compete with the Pd black catalyst. Carbon materials are common supports, their surface properties can be modified easily and it is possible to prepare carbons with different proportion of micro-, meso- and macropores, which can be key factors influencing their performances. A highly mesoporous carbon was synthesised and used as support of Pd catalysts in the enantioselective hydrogenations. To our knowledge this is the first report on the use of highly mesoporous carbon for the preparation of Pd catalysts for liquid-phase hydrogenation. 

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