Anchoring a Co/2-methylimidazole complex on ion-exchange resin and its transformation to Co/N-doped carbon as an electrocatalyst for the ORR

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Title: Anchoring a Co/2-methylimidazole complex on ion-exchange resin and its transformation to Co/N-doped carbon as an electrocatalyst for the ORR
Authors: Zhu, Yexin | Miyake, Koji | Shu, Yasuhiro | Gabe, Atsushi | Hirota, Yuichiro | Uchida, Yoshiaki | Tanaka, Shunsuke | Morallon, Emilia | Cazorla-Amorós, Diego | Nishiyama, Norikazu
Research Group/s: Electrocatálisis y Electroquímica de Polímeros | Materiales Carbonosos y Medio Ambiente
Center, Department or Service: Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Instituto Universitario de Materiales
Keywords: Co/2-methylimidazole complex | Ion-exchange resin | Co/N-doped carbon | Electrocatalyst | ORR
Knowledge Area: Química Física | Química Inorgánica
Issue Date: 2019
Publisher: Royal Society of Chemistry
Citation: Catalysis Science & Technology. 2019, 9: 578-582. doi:10.1039/c8cy02210k
Abstract: Synthesizing high-activity metal/heteroatom-co-doped carbon (M/H–C) electrocatalysts for the oxygen reduction reaction (ORR) is critical for the commercialization of fuel cells, but remains challenging because of the difficulty in making highly dispersed (M/H–C) electrocatalysts. Herein, a commercial ion-exchange resin, Amberlyst 15, is used as a support, and Co/2-methylimidazole is anchored on the ion-exchange site of the support to obtain Co/N/Amb as the precursor of the M/H–C electrocatalyst. After the precursor is pyrolyzed and converted into Co/N/C materials, it is activated with CO2, and the obtained material (act-Co/N/C) exhibits remarkable ORR activity with a high onset potential of 0.943 V (vs. the reversible hydrogen electrode) and an excellent kinetic current density comparable to commercial 5 wt% Pt/C in an alkaline medium. The favorable activity is mainly attributed to the ultra-dispersed CoNx and high porosity of act-Co/N/C. Our synthetic strategy could be applied to the preparation of other well-dispersed M/H–C materials. This work opens a new direction in the synthetic strategy of carbon materials.
Sponsor: Financial support from MINECO (CTQ2015-66080-R) and HEIWA NAKAJIMA FOUNDATION is acknowledged.
ISSN: 2044-4753 (Print) | 2044-4761 (Online)
DOI: 10.1039/c8cy02210k
Language: eng
Type: info:eu-repo/semantics/article
Rights: © The Royal Society of Chemistry 2019
Peer Review: si
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