Graphene oxide sheathed ZIF-8 microcrystals: engineered precursors of nitrogen-doped porous carbon for efficient oxygen reduction reaction (ORR) electrocatalysis
Title | Graphene oxide sheathed ZIF-8 microcrystals: engineered precursors of nitrogen-doped porous carbon for efficient oxygen reduction reaction (ORR) electrocatalysis |
Publication Type | Journal Article |
Year of Publication | 2016 |
Authors | Thomas, M, Illathvalappi, R, Kurungot, S, Nair, BN, Mohamed, AAzeez Peer, Anilkumar, GM, Yamaguchi, T, Hareesh, US |
Journal | ACS Applied Materials & Interfaces |
Volume | 8 |
Issue | 43 |
Pagination | 29373-29382 |
Date Published | NOV |
Type of Article | Article |
ISSN | 1944-8244 |
Keywords | alkaline fuel cell, graphene oxide, N-doped carbon, oxygen reduction reaction, porous carbon, ZIF-8 |
Abstract | Nitrogen containing mesoporous carbon obtained by the pyrolysis of graphene oxide (GO) wrapped ZIF-8 (Zeolitic Imidazolate Frameworks-8) micro crystals is demonstrated to be an efficient catalyst for the oxygen reduction reaction (ORR). ZIF-8 synthesis in the presence of GO sheets helped to realize layers of graphene oxide over ZIF-8 microcrystals and the sphere-like structures thus obtained, on heat treatment, transformed to highly porous carbon with a nitrogen content of about 6.12% and surface area of 502 m(2)/g. These catalysts with a typical micromeso porous architecture exhibited an onset potential of 0.88Vvs RHE in a four electron pathway and also demonstrated superior durability in alkaline medium compared to that of the commercial Pt/C catalyst. The N-doped porous carbon derived from GO sheathed ZIF-8 core shell structures could therefore be employed as an efficient electrocatalyst for fuel cell applications. |
DOI | 10.1021/acsami.6b06979 |
Type of Journal (Indian or Foreign) | Foreign |
Impact Factor (IF) | 7.145 |
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