Pt Monolayers on Electrodeposited Nanoparticles of Different Compositions for Ammonia Electro-Oxidation
Pt monolayers (PtML) supported on nanoparticles with different compositions (i.e., Ru, Rh, Pd, Ir, and Au) were synthesized by the surface–limited redox replacement of underpotentially deposited Cu monolayers on nanoparticle supports. Nanoparticle supports with different compositions were...
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doaj-08013c19db89447c8fd69143ed2bded82020-11-25T00:17:32ZengMDPI AGCatalysts2073-43442018-12-0191410.3390/catal9010004catal9010004Pt Monolayers on Electrodeposited Nanoparticles of Different Compositions for Ammonia Electro-OxidationJie Liu0Bin Liu1Yating Wu2Xu Chen3Jinfeng Zhang4Yida Deng5Wenbin Hu6Cheng Zhong7Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education), School of Materials Science and Engineering, Tianjin University, Tianjin 300072, ChinaState Key Laboratory of Metal Matrix Composites, Shanghai JiaoTong University, Shanghai 200240, ChinaState Key Laboratory of Metal Matrix Composites, Shanghai JiaoTong University, Shanghai 200240, ChinaState Key Laboratory of Metal Matrix Composites, Shanghai JiaoTong University, Shanghai 200240, ChinaTianjin Key Laboratory of Composite and Functional Material, Department of Materials Science and Engineering, Tianjin University, Tianjin 300072, ChinaTianjin Key Laboratory of Composite and Functional Material, Department of Materials Science and Engineering, Tianjin University, Tianjin 300072, ChinaKey Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education), School of Materials Science and Engineering, Tianjin University, Tianjin 300072, ChinaKey Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education), School of Materials Science and Engineering, Tianjin University, Tianjin 300072, ChinaPt monolayers (PtML) supported on nanoparticles with different compositions (i.e., Ru, Rh, Pd, Ir, and Au) were synthesized by the surface–limited redox replacement of underpotentially deposited Cu monolayers on nanoparticle supports. Nanoparticle supports with different compositions were directly deposited on the conducting substrate by a clean and one-step electrodeposition method with controlled deposition potential and time. The whole synthesis process of the electrode was free of surfactants, binders, capping agents and reductants, and without an additional coating process of electrocatalysts. The results show that the specific activity (SA) of PtML electrocatalysts depended strongly on the composition of the nanoparticle support. For example, the PtML supported on the Au nanoparticle exhibited 8.3 times higher SA than that supported on the Ru and Pd nanoparticles. The change in the SA of the PtML supported on different nanoparticles was related to the substrate–induced strain in the PtML resulting from the lattice mismatch between the PtML and the nanoparticle support. As the strain in the PtML changed from the tensile strain to the compressive strain, the SA of the PtML electrocatalysts decreased remarkably.http://www.mdpi.com/2073-4344/9/1/4Pt monolayer nanoparticleselectrocatalystsammonia oxidationelectrodeposition |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Jie Liu Bin Liu Yating Wu Xu Chen Jinfeng Zhang Yida Deng Wenbin Hu Cheng Zhong |
spellingShingle |
Jie Liu Bin Liu Yating Wu Xu Chen Jinfeng Zhang Yida Deng Wenbin Hu Cheng Zhong Pt Monolayers on Electrodeposited Nanoparticles of Different Compositions for Ammonia Electro-Oxidation Catalysts Pt monolayer nanoparticles electrocatalysts ammonia oxidation electrodeposition |
author_facet |
Jie Liu Bin Liu Yating Wu Xu Chen Jinfeng Zhang Yida Deng Wenbin Hu Cheng Zhong |
author_sort |
Jie Liu |
title |
Pt Monolayers on Electrodeposited Nanoparticles of Different Compositions for Ammonia Electro-Oxidation |
title_short |
Pt Monolayers on Electrodeposited Nanoparticles of Different Compositions for Ammonia Electro-Oxidation |
title_full |
Pt Monolayers on Electrodeposited Nanoparticles of Different Compositions for Ammonia Electro-Oxidation |
title_fullStr |
Pt Monolayers on Electrodeposited Nanoparticles of Different Compositions for Ammonia Electro-Oxidation |
title_full_unstemmed |
Pt Monolayers on Electrodeposited Nanoparticles of Different Compositions for Ammonia Electro-Oxidation |
title_sort |
pt monolayers on electrodeposited nanoparticles of different compositions for ammonia electro-oxidation |
publisher |
MDPI AG |
series |
Catalysts |
issn |
2073-4344 |
publishDate |
2018-12-01 |
description |
Pt monolayers (PtML) supported on nanoparticles with different compositions (i.e., Ru, Rh, Pd, Ir, and Au) were synthesized by the surface–limited redox replacement of underpotentially deposited Cu monolayers on nanoparticle supports. Nanoparticle supports with different compositions were directly deposited on the conducting substrate by a clean and one-step electrodeposition method with controlled deposition potential and time. The whole synthesis process of the electrode was free of surfactants, binders, capping agents and reductants, and without an additional coating process of electrocatalysts. The results show that the specific activity (SA) of PtML electrocatalysts depended strongly on the composition of the nanoparticle support. For example, the PtML supported on the Au nanoparticle exhibited 8.3 times higher SA than that supported on the Ru and Pd nanoparticles. The change in the SA of the PtML supported on different nanoparticles was related to the substrate–induced strain in the PtML resulting from the lattice mismatch between the PtML and the nanoparticle support. As the strain in the PtML changed from the tensile strain to the compressive strain, the SA of the PtML electrocatalysts decreased remarkably. |
topic |
Pt monolayer nanoparticles electrocatalysts ammonia oxidation electrodeposition |
url |
http://www.mdpi.com/2073-4344/9/1/4 |
work_keys_str_mv |
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1725379406955806720 |