Facile preparation of a methanol catalyst with ultra-high voltage efficiency and super-durability: Pt pollution introduction by composite electrodeposition
Noble metal catalysts are still the best methanol oxidation reaction (MOR) catalysts for direct methanol fuel cells nowadays, because the MOR onset potential of non-noble metal-based catalysts is much higher than that of Pt (usually greater than 1.35 V vs. RHE), so that the potential of the MOR is e...
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Published in | Journal of materials chemistry. A, Materials for energy and sustainability Vol. 11; no. 14; pp. 7556 - 7563 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Cambridge
Royal Society of Chemistry
04.04.2023
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Subjects | |
Online Access | Get full text |
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Summary: | Noble metal catalysts are still the best methanol oxidation reaction (MOR) catalysts for direct methanol fuel cells nowadays, because the MOR onset potential of non-noble metal-based catalysts is much higher than that of Pt (usually greater than 1.35 V
vs.
RHE), so that the potential of the MOR is even higher than that of the oxygen reduction reaction and cannot form a cell. Here, we develop a high-performance non-noble-metal based (CoSn) MOR catalyst with a small amount (3.2 wt%) of Pt, which exhibits overpotential even lower than that of Pt/C (260 mV lower), unparalleled stability (retains 610 mA mg
Pt
−1
after chronoamperometry testing for 28 h, the best value for methanol oxidation reported to date) and high methanol oxidation activity (3680 mA mg
Pt
−1
). We synthesize this CoSn-Pt catalyst by innovatively utilizing a Pt plate as a counter electrode (which is always avoided to prevent potential pollution of Pt in the past) to realize composite electrodeposition in a deep eutectic solvent.
We innovatively develop a high-performance MOR catalyst with small amounts (3.2 wt%) of Pt by composite electrodeposition using a Pt plate as a counter electrode. The material exhibits ultra-high voltage efficiency and unparalleled stability. |
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Bibliography: | https://doi.org/10.1039/d2ta09655b Electronic supplementary information (ESI) available: Experimental section, additional Fig. S1-S17, and Table S1. See DOI |
ISSN: | 2050-7488 2050-7496 |
DOI: | 10.1039/d2ta09655b |