Molecule-level g-C₃N₄ coordinated transition metals as a new class of electrocatalysts for oxygen electrode reactions
Date
2017
Authors
Zheng, Y.
Jiao, Y.
Zhu, Y.
Cai, Q.
Vasileff, A.
Li, L.
Han, Y.
Chen, Y.
Qiao, S.
Editors
Advisors
Journal Title
Journal ISSN
Volume Title
Type:
Journal article
Citation
Journal of the American Chemical Society, 2017; 139(9):3336-3339
Statement of Responsibility
Yao Zheng, Yan Jiao , Yihan Zhu, Qiran Cai, Anthony Vasileff, Lu Hua Li, Yu Han, Ying Chen and Shi-Zhang Qiao
Conference Name
Abstract
Organometallic complexes with metal-nitrogen/carbon (M-N/C) coordination are the most important alternatives to precious metal catalysts for oxygen reduction and evolution reactions (ORR and OER) in energy conversion devices. Here, we designed and developed a range of molecule-level graphitic carbon nitride (g-C3N4) coordinated transition metals (M-C3N4) as a new generation of M-N/C catalysts for these oxygen electrode reactions. As a proof-of-concept example, we conducted theoretical evaluation and experimental validation on a cobalt-C3N4 catalyst with a desired molecular configuration, which possesses comparable electrocatalytic activity to that of precious metal benchmarks for the ORR and OER in alkaline media. The correlation of experimental and computational results confirms that this high activity originates from the precise M-N2 coordination in the g-C3N4 matrix. Moreover, the reversible ORR/OER activity trend for a wide variety of M-C3N4 complexes has been constructed to provide guidance for the molecular design of this promising class of catalysts.
School/Discipline
Dissertation Note
Provenance
Description
Access Status
Rights
Copyright © 2017 American Chemical Society