Journal
JOURNAL OF CATALYSIS
Volume 387, Issue -, Pages 129-137Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2020.04.014
Keywords
Amino trimethylene phosphonic acid (ATMP); Oxygen reduction reaction (ORR); Electrocatalysis; Cobalt-metaphosphate
Categories
Funding
- National Natural Science Foundation of China [21675086]
- Fundamental Research Funds for the Central Universities [30918012202]
- Sino-French international research network New nanostructured materials and biomaterials for renewable electrical energy sources
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Rational design and facile synthesis of highly active electrocatalysts with low cost for oxygen reduction reaction (ORR) are always of great challenge. Specifically, development of a new type of energy-saving materials with convenient method is regarded as the current bottleneck. Herein, an innovative strategy based on amino trimethylene phosphonic acid (ATMP) as chelating agent for cobalt-metaphosphate coordination polymer is reported to one-pot synthesis of a novel precursor in methanol for ORR electrocatalyst. Carbonization of the precursor at 900 degrees C at N-2 atmosphere results in the feasible formation of cobalt metaphosphate based composite (Co(PO3)(2)/NC). A further step in the thermal cleavage at 650 degrees C at air for 4 h, Co(PO3)(2)/NC can be finally transformed into inorganic Co(PO3)(2). Advanced spectroscopic techniques and density function theory (DFT) calculations are applied to confirm the main catalytically active center and the physical properties of Co(PO3)(2)/NC. This obtained Co(PO3)(2)/NC nanocomposite exhibits superior electrocatalysis to Co(PO3)(2) with an enhanced onset potential (0.906 V vs. RHE) and diffusion limiting current (5.062 mA cm(2)), which are roughly close to those of commercial 20% Pt/C (0.916 V, 5.200 mA cm(2)). (C) 2020 Published by Elsevier Inc.
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