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A Mild CO2 Etching Method To Tailor the Pore Structure of Platinum-Free Oxygen Reduction Catalysts in Proton Exchange Membrane Fuel Cells
- Wan, Liyang (author)
- Chen, Weikun (author)
- Xu, Hui (author)
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- Wang, Yucheng (author)
- Zhou, Zhiyou (author)
- Sun, Shigang (author)
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- (creator_code:org_t)
- 2021-09-15
- 2021
- English.
- In: ACS Applied Materials and Interfaces. - : American Chemical Society (ACS). - 1944-8244 .- 1944-8252. ; 13:38, s. 45661-45669
- Journal article (peer-reviewed)
Abstract
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- The structural tailoring of pores is essential to high-performance Fe/N/C electrocatalysts for the oxygen reduction reaction (ORR) in proton exchange membrane fuel cells. Current strategies for pore structure engineering are usually accompanied with a drastic change of the intrinsic activity-related surface, which may mask the real effects of the porous structure on ORR activity. Herein, a mild carbon dioxide (CO2) etching method was used to flexibly tailor the pore structure of Fe/N/C electrocatalysts without drastic changes in their surface structure and property. In this way, via employing the Fe/N/C electrocatalysts as a model, the intrinsic impact of the pore structure on ORR activity was revealed. In addition, the CO2 etching method developed a high-quality electrocatalyst (sample Fe/N/C–5% CO2) with polarization performance exceeding that of the commercial Pt/C catalyst in the fuel cell working voltage region (>0.65 V). This work will promote the ongoing intensive studies on the rational design of the pore structures in the Fe/N/C electrocatalysts.
Subject headings
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
Keyword
- fuel cells
- oxygen reduction reaction
- Fe/N/C electrocatalysts
- CO2 etching
- pore structure
Publication and Content Type
- ref (subject category)
- art (subject category)
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- Wan, Liyang
- Chen, Weikun
- Xu, Hui
- Wang, Yucheng
- Yuan, Jiayin
- Zhou, Zhiyou
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- Sun, Shigang
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- Stockholm University
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