Efficient synthesis of Pt-Co nanowires as cathode catalysts for proton exchange membrane fuel cells
A simple and efficient method was used to prepare highly active and durable carbon-supported ultrathin Pt-Co nanowires (NWs) as oxygen reduction reaction (ORR) catalysts for the cathode in a proton exchange membrane fuel cell (PEMFC). Chromium hexacarbonyl plays a significant role in making Pt and C...
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Published in | RSC advances Vol. 1; no. 11; pp. 6287 - 6296 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
England
Royal Society of Chemistry
10.02.2020
The Royal Society of Chemistry |
Subjects | |
Online Access | Get full text |
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Summary: | A simple and efficient method was used to prepare highly active and durable carbon-supported ultrathin Pt-Co nanowires (NWs) as oxygen reduction reaction (ORR) catalysts for the cathode in a proton exchange membrane fuel cell (PEMFC). Chromium hexacarbonyl plays a significant role in making Pt and Co form an alloyed NW, which acts as both a reducing agent and a structure directing agent. The nanocrystal exhibits a uniform nanowire morphology with a diameter of 2 nm and a length of 30 nm. In half cell tests, the Pt-Co NWs/C catalyst has a mass activity of 291.4 mA mg
Pt
−1
, which is significantly better than commercial Pt/C catalysts with 85.5 mA mg
Pt
−1
. And after the accelerated durability test (ADT), Pt-Co NWs/C shows an electrochemically active surface area (ECSA) loss of 19.1% while the loss in the commercial catalyst is 41.8%. Also, the membrane electrode assembly (MEA) was prepared using Pt-Co NWs/C as the cathode catalyst, resulting in a maximum power density of 952 mW cm
−2
, which is higher than that of Pt/C. These results indicate that the one-dimensional structure of the catalyst prepared herein is favorable to improve the activity and durability, and the application of the catalyst in the MEA is also realized.
A simple and efficient method was used to prepare highly active and durable carbon-supported ultrathin Pt-Co nanowires (NWs) as oxygen reduction reaction (ORR) catalysts for the cathode in a proton exchange membrane fuel cell (PEMFC). |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 2046-2069 2046-2069 |
DOI: | 10.1039/d0ra00264j |