High-Performance Pt–Co Nanoframes for Fuel-Cell Electrocatalysis
Abstract
Pt-based alloy catalysts are promising candidates for fuel-cell applications, especially for cathodic oxygen reduction reaction (ORR) and anodic methanol oxidation reaction (MOR). The rational design of composition and morphology is crucial to promoting catalytic performances. Here, we report the synthesis of Pt–Co nanoframes via chemical etching of Co from solid rhombic dodecahedra. The obtained Pt–Co nanoframes exhibit excellent ORR mass activity in acidic electrolyte, which is as high as 0.40 A mgPt–1 initially and 0.34 A mgPt–1 after 10 000 potential cycles at 0.95 VRHE. Furthermore, their MOR mass activity in alkaline media is up to 4.28 A mgPt–1 and is 4-fold higher than that of commercial Pt/C catalyst. Furthermore, experimental studies indicate that the weakened binding of intermediate carbonaceous poison contributes to the enhanced MOR behavior. More impressively, the Pt–Co nanoframes also demonstrate remarkable stability under long-term testing, which could be attributed to the negligible electrochemical Co dissolution.
- Authors:
-
[1];
[2];
[4]
- Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Univ. of California, Berkeley, CA (United States)
- Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Kavli Energy NanoScience Institute, Berkeley, CA (United States)
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1671763
- Grant/Contract Number:
- AC02-05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nano Letters
- Additional Journal Information:
- Journal Volume: 20; Journal Issue: 3; Journal ID: ISSN 1530-6984
- Publisher:
- American Chemical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 25 ENERGY STORAGE; platinum-cobalt electrocatalyst; nanoframe; oxygen reduction reaction; methanol oxidation reaction; fuel cell
Citation Formats
Chen, Shouping, Li, Mufan, Gao, Mengyu, Jin, Jianbo, van Spronsen, Matthijs A., Salmeron, Miquel B., and Yang, Peidong. High-Performance Pt–Co Nanoframes for Fuel-Cell Electrocatalysis. United States: N. p., 2020.
Web. doi:10.1021/acs.nanolett.9b05251.
Chen, Shouping, Li, Mufan, Gao, Mengyu, Jin, Jianbo, van Spronsen, Matthijs A., Salmeron, Miquel B., & Yang, Peidong. High-Performance Pt–Co Nanoframes for Fuel-Cell Electrocatalysis. United States. https://doi.org/10.1021/acs.nanolett.9b05251
Chen, Shouping, Li, Mufan, Gao, Mengyu, Jin, Jianbo, van Spronsen, Matthijs A., Salmeron, Miquel B., and Yang, Peidong. Wed .
"High-Performance Pt–Co Nanoframes for Fuel-Cell Electrocatalysis". United States. https://doi.org/10.1021/acs.nanolett.9b05251. https://www.osti.gov/servlets/purl/1671763.
@article{osti_1671763,
title = {High-Performance Pt–Co Nanoframes for Fuel-Cell Electrocatalysis},
author = {Chen, Shouping and Li, Mufan and Gao, Mengyu and Jin, Jianbo and van Spronsen, Matthijs A. and Salmeron, Miquel B. and Yang, Peidong},
abstractNote = {Pt-based alloy catalysts are promising candidates for fuel-cell applications, especially for cathodic oxygen reduction reaction (ORR) and anodic methanol oxidation reaction (MOR). The rational design of composition and morphology is crucial to promoting catalytic performances. Here, we report the synthesis of Pt–Co nanoframes via chemical etching of Co from solid rhombic dodecahedra. The obtained Pt–Co nanoframes exhibit excellent ORR mass activity in acidic electrolyte, which is as high as 0.40 A mgPt–1 initially and 0.34 A mgPt–1 after 10 000 potential cycles at 0.95 VRHE. Furthermore, their MOR mass activity in alkaline media is up to 4.28 A mgPt–1 and is 4-fold higher than that of commercial Pt/C catalyst. Furthermore, experimental studies indicate that the weakened binding of intermediate carbonaceous poison contributes to the enhanced MOR behavior. More impressively, the Pt–Co nanoframes also demonstrate remarkable stability under long-term testing, which could be attributed to the negligible electrochemical Co dissolution.},
doi = {10.1021/acs.nanolett.9b05251},
journal = {Nano Letters},
number = 3,
volume = 20,
place = {United States},
year = {Wed Feb 12 00:00:00 EST 2020},
month = {Wed Feb 12 00:00:00 EST 2020}
}
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