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Determination of the electrochemically active surface area by CO and hydrogen of PtSnRuTa/C-based electrocatalysts and their relationship with catalytic activity against alcohol oxidation. CHEMICAL PAPERS 2022. [DOI: 10.1007/s11696-022-02191-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Gao L, Li X, Yao Z, Bai H, Lu Y, Ma C, Lu S, Peng Z, Yang J, Pan A, Huang H. Unconventional p–d Hybridization Interaction in PtGa Ultrathin Nanowires Boosts Oxygen Reduction Electrocatalysis. J Am Chem Soc 2019; 141:18083-18090. [DOI: 10.1021/jacs.9b07238] [Citation(s) in RCA: 123] [Impact Index Per Article: 24.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Lei Gao
- College of Materials Science and Engineering, Hunan University, Changsha, Hunan 410082, People’s Republic of China
| | - Xingxing Li
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China
| | - Zhaoyu Yao
- College of Materials Science and Engineering, Hunan University, Changsha, Hunan 410082, People’s Republic of China
| | - Huijuan Bai
- Beijing Key Laboratory of Bio-inspired Energy Materials and Devices, School of Space and Environment, Beihang University, Beijing 100191, People’s Republic of China
| | - Yangfan Lu
- State Key Lab of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, People’s Republic of China
| | - Chao Ma
- College of Materials Science and Engineering, Hunan University, Changsha, Hunan 410082, People’s Republic of China
| | - Shanfu Lu
- Beijing Key Laboratory of Bio-inspired Energy Materials and Devices, School of Space and Environment, Beihang University, Beijing 100191, People’s Republic of China
| | - Zhenmeng Peng
- Department of Chemical and Biomolecular Engineering, University of Akron, Akron, Ohio 44325, United States
| | - Jinlong Yang
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China
| | - Anlian Pan
- College of Materials Science and Engineering, Hunan University, Changsha, Hunan 410082, People’s Republic of China
| | - Hongwen Huang
- College of Materials Science and Engineering, Hunan University, Changsha, Hunan 410082, People’s Republic of China
- State Key Lab of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, People’s Republic of China
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Oloye O, Tang C, Du A, Will G, O'Mullane AP. Galvanic replacement of liquid metal galinstan with Pt for the synthesis of electrocatalytically active nanomaterials. NANOSCALE 2019; 11:9705-9715. [PMID: 31066435 DOI: 10.1039/c9nr02458a] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The galvanic replacement reaction is a verstile method for the fabrication of bimetallic nanomaterials which is usually limited to solid precursors. Here we report on the galvanic replacement of liquid metal galinstan with Pt which predominantly results in the formation of a Pt5Ga1 material. During the galvanic replacement process an interesting phenomenon was observed whereby a plume of nanomaterial is ejected upwards from the centre of the liquid metal droplet into solution which is due to surface tension gradients on the liquid metal surface that induces surface convection. It was also found that hydrogen gas was liberated during the process facilitated by the formation of the Pt rich nanomaterial which is a highly effective catalyst for the hydrogen evolution reaction (HER). The material was characterised by scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction and dynamic light scattering measurements. It was found that Pt5Ga1 was highly effective for the electrochemical oxidation of methanol and ethanol and outperformed a commercial Pt/C catalyst. Density functional theory calculations confirmed that the increased activity is due to the anti poisoning properties of the surface towards CO upon the incorporation of Ga atoms into a Pt catalyst. The use of liquid metals and galvanic replacement offers a simple approach to fabricating Ga based alloy nanomaterials that may have use in many other types of applications.
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Affiliation(s)
- Olawale Oloye
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology (QUT), Brisbane, QLD 4001, Australia.
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