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      Efficient CO2 electroreduction over N-doped hieratically porous carbon derived from petroleum pitch

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          CO2electroreduction to ethylene via hydroxide-mediated copper catalysis at an abrupt interface

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            Active sites of nitrogen-doped carbon materials for oxygen reduction reaction clarified using model catalysts.

            Nitrogen (N)-doped carbon materials exhibit high electrocatalytic activity for the oxygen reduction reaction (ORR), which is essential for several renewable energy systems. However, the ORR active site (or sites) is unclear, which retards further developments of high-performance catalysts. Here, we characterized the ORR active site by using newly designed graphite (highly oriented pyrolitic graphite) model catalysts with well-defined π conjugation and well-controlled doping of N species. The ORR active site is created by pyridinic N. Carbon dioxide adsorption experiments indicated that pyridinic N also creates Lewis basic sites. The specific activities per pyridinic N in the HOPG model catalysts are comparable with those of N-doped graphene powder catalysts. Thus, the ORR active sites in N-doped carbon materials are carbon atoms with Lewis basicity next to pyridinic N.
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              Atomically dispersed Ni(i) as the active site for electrochemical CO2 reduction

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                Author and article information

                Contributors
                Journal
                Journal of Energy Chemistry
                Journal of Energy Chemistry
                Elsevier BV
                20954956
                May 2021
                May 2021
                : 56
                : 113-120
                Article
                10.1016/j.jechem.2020.07.049
                fc9ae8cb-e626-4937-8a73-541d6149d6fd
                © 2021

                https://www.elsevier.com/tdm/userlicense/1.0/

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