Carbon-Supported High-Loading Sub-4 nm PtCo Alloy Electrocatalysts for Superior Oxygen Reduction Reaction
Increasing the loading density of nanoparticles on carbon support is essential for making Pt-alloy/C catalysts practical in H<sub>2</sub>-air fuel cells. The challenge lies in increasing the loading while suppressing the sintering of Pt-alloy nanoparticles. This work presents a 40% Pt-we...
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MDPI AG
2023-08-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/13/16/2367 |
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| author | Linlin Xiang Yunqin Hu Yanyan Zhao Sufeng Cao Long Kuai |
| author_facet | Linlin Xiang Yunqin Hu Yanyan Zhao Sufeng Cao Long Kuai |
| author_sort | Linlin Xiang |
| collection | DOAJ |
| description | Increasing the loading density of nanoparticles on carbon support is essential for making Pt-alloy/C catalysts practical in H<sub>2</sub>-air fuel cells. The challenge lies in increasing the loading while suppressing the sintering of Pt-alloy nanoparticles. This work presents a 40% Pt-weighted sub-4 nm PtCo/C alloy catalyst via a simple incipient wetness impregnation method. By carefully optimizing the synthetic conditions such as Pt/Co ratios, calcination temperature, and time, the size of supported PtCo alloy nanoparticles is successfully controlled below 4 nm, and a high electrochemical surface area of 93.8 m<sup>2</sup>/g is achieved, which is 3.4 times that of commercial PtCo/C-TKK catalysts. Demonstrated by electrochemical oxygen reduction reactions, PtCo/C alloy catalysts present an enhanced mass activity of 0.465 A/mg at 0.9 V vs. RHE, which is 2.0 times that of the PtCo/C-TKK catalyst. Therefore, the developed PtCo/C alloy catalyst has the potential to be a highly practical catalyst for H<sub>2</sub>–air fuel cells. |
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| id | doaj.art-9d9f3cf7d6f946f5b4a89fee876650f7 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T23:40:42Z |
| publishDate | 2023-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-9d9f3cf7d6f946f5b4a89fee876650f72023-11-19T02:28:05ZengMDPI AGNanomaterials2079-49912023-08-011316236710.3390/nano13162367Carbon-Supported High-Loading Sub-4 nm PtCo Alloy Electrocatalysts for Superior Oxygen Reduction ReactionLinlin Xiang0Yunqin Hu1Yanyan Zhao2Sufeng Cao3Long Kuai4School of Chemical and Environmental Engineering, Anhui Laboratory of Clean Catalytic Engineering, Key Laboratory of Production and Conversion of Green Hydrogen, Anhui Polytechnic University, Beijing Middle Road, Wuhu 241000, ChinaSchool of Chemical and Environmental Engineering, Anhui Laboratory of Clean Catalytic Engineering, Key Laboratory of Production and Conversion of Green Hydrogen, Anhui Polytechnic University, Beijing Middle Road, Wuhu 241000, ChinaThe Rowland Institute at Harvard, 100 Edwin H Land Blvd, Cambridge, MA 02142, USAAramco Boston Downstream Center, 400 Technology Square, Cambridge, MA 02139, USASchool of Chemical and Environmental Engineering, Anhui Laboratory of Clean Catalytic Engineering, Key Laboratory of Production and Conversion of Green Hydrogen, Anhui Polytechnic University, Beijing Middle Road, Wuhu 241000, ChinaIncreasing the loading density of nanoparticles on carbon support is essential for making Pt-alloy/C catalysts practical in H<sub>2</sub>-air fuel cells. The challenge lies in increasing the loading while suppressing the sintering of Pt-alloy nanoparticles. This work presents a 40% Pt-weighted sub-4 nm PtCo/C alloy catalyst via a simple incipient wetness impregnation method. By carefully optimizing the synthetic conditions such as Pt/Co ratios, calcination temperature, and time, the size of supported PtCo alloy nanoparticles is successfully controlled below 4 nm, and a high electrochemical surface area of 93.8 m<sup>2</sup>/g is achieved, which is 3.4 times that of commercial PtCo/C-TKK catalysts. Demonstrated by electrochemical oxygen reduction reactions, PtCo/C alloy catalysts present an enhanced mass activity of 0.465 A/mg at 0.9 V vs. RHE, which is 2.0 times that of the PtCo/C-TKK catalyst. Therefore, the developed PtCo/C alloy catalyst has the potential to be a highly practical catalyst for H<sub>2</sub>–air fuel cells.https://www.mdpi.com/2079-4991/13/16/2367carbon supportPtCo/Cfuel cellselectrocatalysishigh loading |
| spellingShingle | Linlin Xiang Yunqin Hu Yanyan Zhao Sufeng Cao Long Kuai Carbon-Supported High-Loading Sub-4 nm PtCo Alloy Electrocatalysts for Superior Oxygen Reduction Reaction Nanomaterials carbon support PtCo/C fuel cells electrocatalysis high loading |
| title | Carbon-Supported High-Loading Sub-4 nm PtCo Alloy Electrocatalysts for Superior Oxygen Reduction Reaction |
| title_full | Carbon-Supported High-Loading Sub-4 nm PtCo Alloy Electrocatalysts for Superior Oxygen Reduction Reaction |
| title_fullStr | Carbon-Supported High-Loading Sub-4 nm PtCo Alloy Electrocatalysts for Superior Oxygen Reduction Reaction |
| title_full_unstemmed | Carbon-Supported High-Loading Sub-4 nm PtCo Alloy Electrocatalysts for Superior Oxygen Reduction Reaction |
| title_short | Carbon-Supported High-Loading Sub-4 nm PtCo Alloy Electrocatalysts for Superior Oxygen Reduction Reaction |
| title_sort | carbon supported high loading sub 4 nm ptco alloy electrocatalysts for superior oxygen reduction reaction |
| topic | carbon support PtCo/C fuel cells electrocatalysis high loading |
| url | https://www.mdpi.com/2079-4991/13/16/2367 |
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