Catalyst with a low load of platinum and high activity for oxygen reduction derived from strong adsorption of Pt−N4 moieties on a carbon surface
Minimizing the use of platinum (Pt) in catalysts for the oxygen reduction reaction (ORR) is critical for the commercial application of fuel cells. Here, we report a highly active carbon-supported catalyst with a low loading of Pt nanoparticles (Pt/C-N, 7.13 wt% Pt), prepared using a small molecular...
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| Format: | Article |
| Language: | English |
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Elsevier
2021-06-01
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| Series: | Electrochemistry Communications |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1388248121001235 |
| _version_ | 1818456483332882432 |
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| author | Zhiwei Xiang Wei Li Feng Liu Feng Tan Fuxu Han Xinzhong Wang Changwei Shao Mingli Xu Weiping Liu Xikun Yang |
| author_facet | Zhiwei Xiang Wei Li Feng Liu Feng Tan Fuxu Han Xinzhong Wang Changwei Shao Mingli Xu Weiping Liu Xikun Yang |
| author_sort | Zhiwei Xiang |
| collection | DOAJ |
| description | Minimizing the use of platinum (Pt) in catalysts for the oxygen reduction reaction (ORR) is critical for the commercial application of fuel cells. Here, we report a highly active carbon-supported catalyst with a low loading of Pt nanoparticles (Pt/C-N, 7.13 wt% Pt), prepared using a small molecular Pt complex containing Pt−N4 moieties as the Pt precursor. It was confirmed that Pt nanoparticles with an average diameter of <3 nm were uniformly adsorbed on a nitrogen (N)-doped carbon surface by carbothermal reduction of a composite composed of Pt(NH3)42+ ions and carbon via strong electrostatic attraction. More importantly, it is found that single atoms of platinum and pyridinic N active sites for the ORR are created during this process. The Pt/C-N catalyst shows very high ORR performance in acidic media, with a mass activity of 108 mA/mgPt−1 (at 0.9 V vs. RHE), which is three times greater than that of a commercial Pt/C catalyst (20 wt% Pt, 35 mA/mgPt−1). The high ORR activity of the Pt/C-N catalyst is ascribed to the synergistic catalytic effect of the Pt nanocrystals and the atomically dispersed active sites, which include single atoms of Pt and pyridinic N. |
| first_indexed | 2024-12-14T22:27:23Z |
| format | Article |
| id | doaj.art-c4604414496c412ea1de7fcd698f7c74 |
| institution | Directory Open Access Journal |
| issn | 1388-2481 |
| language | English |
| last_indexed | 2024-12-14T22:27:23Z |
| publishDate | 2021-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Electrochemistry Communications |
| spelling | doaj.art-c4604414496c412ea1de7fcd698f7c742022-12-21T22:45:19ZengElsevierElectrochemistry Communications1388-24812021-06-01127107039Catalyst with a low load of platinum and high activity for oxygen reduction derived from strong adsorption of Pt−N4 moieties on a carbon surfaceZhiwei Xiang0Wei Li1Feng Liu2Feng Tan3Fuxu Han4Xinzhong Wang5Changwei Shao6Mingli Xu7Weiping Liu8Xikun Yang9Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China; Research Center for Analysis and Measurement, Kunming University of Science and Technology, Kunming 650093, ChinaFaculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China; Research Center for Analysis and Measurement, Kunming University of Science and Technology, Kunming 650093, ChinaKunming Institute of Precious Metals, Kunming 650106, ChinaResearch Center for Analysis and Measurement, Kunming University of Science and Technology, Kunming 650093, ChinaResearch Center for Analysis and Measurement, Kunming University of Science and Technology, Kunming 650093, ChinaResearch Center for Analysis and Measurement, Kunming University of Science and Technology, Kunming 650093, ChinaResearch Center for Analysis and Measurement, Kunming University of Science and Technology, Kunming 650093, ChinaFaculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, ChinaKunming Institute of Precious Metals, Kunming 650106, ChinaFaculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China; Research Center for Analysis and Measurement, Kunming University of Science and Technology, Kunming 650093, China; Corresponding author at: Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China.Minimizing the use of platinum (Pt) in catalysts for the oxygen reduction reaction (ORR) is critical for the commercial application of fuel cells. Here, we report a highly active carbon-supported catalyst with a low loading of Pt nanoparticles (Pt/C-N, 7.13 wt% Pt), prepared using a small molecular Pt complex containing Pt−N4 moieties as the Pt precursor. It was confirmed that Pt nanoparticles with an average diameter of <3 nm were uniformly adsorbed on a nitrogen (N)-doped carbon surface by carbothermal reduction of a composite composed of Pt(NH3)42+ ions and carbon via strong electrostatic attraction. More importantly, it is found that single atoms of platinum and pyridinic N active sites for the ORR are created during this process. The Pt/C-N catalyst shows very high ORR performance in acidic media, with a mass activity of 108 mA/mgPt−1 (at 0.9 V vs. RHE), which is three times greater than that of a commercial Pt/C catalyst (20 wt% Pt, 35 mA/mgPt−1). The high ORR activity of the Pt/C-N catalyst is ascribed to the synergistic catalytic effect of the Pt nanocrystals and the atomically dispersed active sites, which include single atoms of Pt and pyridinic N.http://www.sciencedirect.com/science/article/pii/S1388248121001235Low-loading platinum catalystsCarbothermal reductionPt single atoms Pyridinic NOxygen reduction reaction |
| spellingShingle | Zhiwei Xiang Wei Li Feng Liu Feng Tan Fuxu Han Xinzhong Wang Changwei Shao Mingli Xu Weiping Liu Xikun Yang Catalyst with a low load of platinum and high activity for oxygen reduction derived from strong adsorption of Pt−N4 moieties on a carbon surface Electrochemistry Communications Low-loading platinum catalysts Carbothermal reduction Pt single atoms Pyridinic N Oxygen reduction reaction |
| title | Catalyst with a low load of platinum and high activity for oxygen reduction derived from strong adsorption of Pt−N4 moieties on a carbon surface |
| title_full | Catalyst with a low load of platinum and high activity for oxygen reduction derived from strong adsorption of Pt−N4 moieties on a carbon surface |
| title_fullStr | Catalyst with a low load of platinum and high activity for oxygen reduction derived from strong adsorption of Pt−N4 moieties on a carbon surface |
| title_full_unstemmed | Catalyst with a low load of platinum and high activity for oxygen reduction derived from strong adsorption of Pt−N4 moieties on a carbon surface |
| title_short | Catalyst with a low load of platinum and high activity for oxygen reduction derived from strong adsorption of Pt−N4 moieties on a carbon surface |
| title_sort | catalyst with a low load of platinum and high activity for oxygen reduction derived from strong adsorption of pt n4 moieties on a carbon surface |
| topic | Low-loading platinum catalysts Carbothermal reduction Pt single atoms Pyridinic N Oxygen reduction reaction |
| url | http://www.sciencedirect.com/science/article/pii/S1388248121001235 |
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