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Catalytic wet peroxide oxidation (CWPO) is an advanced oxidation process,
operated using simple equipment and mild operating conditians, in which highly
oxidizing hydraxyl radicaIs (HO') are generated fram the catalytic decompasition af
hydrogen peroxide (H,O,) [L 2). Sinee the report of Lüeking el ai. in 1998 [3], the
develapment af suitab-Ie -carbonaceous materials (without any added metal phase)
for CWPO has been intensively explored [4). lhe influenee of struetUfal and surraee
chemical features on their adsorption and catalytic performance was also a subject of
study and discussion. In lhe present work, gathering the Imowledge acquired in the
last few years in several publications of our research graup, some crucial praperties
that should be combined when developing carbonaceous materiais for CWPO
applications are identified (cf Figure la) and thoroughly explored. For instanee,
graphene-based materiaIs were recently reported as active and stable catalysts for
the CWPO of high1y eoneentrated 4-nitrophenol solutions (5 g L" ), the main aetive
sites being at electran rich regions generated Eram the confinement af delocalized
rr-electrans caused by structural defects [5]. The mechanism over these active sites
involves the reductive decomposition oEH201 to generate HO', as shown in Figure lb.
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Ribeiro, Rui S.; Silva, Adrián M.T.; Pastrana-Martínez, Luisa M.; Figueiredo, José L.; Faria, Joaquim L.; Gomes, Helder (2014). Key parameters when developing carbonaceous materials for catalytic wet peroxide oxidation. In XX Encontro Luso-Galego de Química. Porto.