Facile Direct Seed-Mediated Growth of AuPt Bimetallic Shell on the Surface of Pd Nanocubes and Application for Direct H<sub>2</sub>O<sub>2</sub> Synthesis
The selective enhancement of catalytic activity is a challenging task, as catalyst modification is generally accompanied by both desirable and undesirable properties. For example, in the case of the direct synthesis of hydrogen peroxide, Pt on Pd improves hydrogen conversion, but lowers hydrogen per...
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MDPI AG
2020-06-01
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author | Geun-Ho Han Ki Yoon Kim Hyunji Nam Hyeonjin Kim Jihwan Yoon Jung-Hyun Lee Hong-Kyu Kim Jae-Pyoung Ahn Seung Yong Lee Kwan-Young Lee Taekyung Yu |
author_facet | Geun-Ho Han Ki Yoon Kim Hyunji Nam Hyeonjin Kim Jihwan Yoon Jung-Hyun Lee Hong-Kyu Kim Jae-Pyoung Ahn Seung Yong Lee Kwan-Young Lee Taekyung Yu |
author_sort | Geun-Ho Han |
collection | DOAJ |
description | The selective enhancement of catalytic activity is a challenging task, as catalyst modification is generally accompanied by both desirable and undesirable properties. For example, in the case of the direct synthesis of hydrogen peroxide, Pt on Pd improves hydrogen conversion, but lowers hydrogen peroxide selectivity, whereas Au on Pd enhances hydrogen peroxide selectivity but decreases hydrogen conversion. Toward an ideal catalytic property, the development of a catalyst that is capable of improving H-H dissociation for increasing H<sub>2</sub> conversion, whilst suppressing O-O dissociation for high H<sub>2</sub>O<sub>2</sub> selectivity would be highly beneficial. Pd-core AuPt-bimetallic shell nanoparticles with a nano-sized bimetallic layer composed of Au-rich or Pt-rich content with Pd cubes were readily prepared via the direct seed-mediated growth method. In the Pd-core AuPt-bimetallic shell nanoparticles, Au was predominantly located on the {100} facets of the Pd nanocubes, whereas Pt was deposited on the corners of the Pd nanocubes. The evaluation of Pd-core AuPt-bimetallic shell nanoparticles with varying Au and Pt contents revealed that Pd-core AuPt-bimetallic shell that was composed of 2.5 mol% Au and 5 mol% Pt, in relation to Pd, exhibited the highest H<sub>2</sub>O<sub>2</sub> production rate (914 mmol H<sub>2</sub>O<sub>2</sub> g<sub>metal</sub><sup>−1</sup> h<sup>−1</sup>), due to the improvement of both H<sub>2</sub>O<sub>2</sub> selectivity and H<sub>2</sub> conversion. |
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spelling | doaj.art-69b8980a81cc40fb97008bedf0a88a692023-11-20T03:23:45ZengMDPI AGCatalysts2073-43442020-06-0110665010.3390/catal10060650Facile Direct Seed-Mediated Growth of AuPt Bimetallic Shell on the Surface of Pd Nanocubes and Application for Direct H<sub>2</sub>O<sub>2</sub> SynthesisGeun-Ho Han0Ki Yoon Kim1Hyunji Nam2Hyeonjin Kim3Jihwan Yoon4Jung-Hyun Lee5Hong-Kyu Kim6Jae-Pyoung Ahn7Seung Yong Lee8Kwan-Young Lee9Taekyung Yu10Department of Chemical and Biological Engineering, Korea University, Seoul 02841, KoreaDepartment of Chemical Engineering, College of Engineering, Kyung Hee University, Yongin 17140, KoreaDepartment of Chemical and Biological Engineering, Korea University, Seoul 02841, KoreaAdvanced Analysis Center, Korea Institute of Science and Technology (KIST), Seoul 02792, KoreaDepartment of Chemical and Biological Engineering, Korea University, Seoul 02841, KoreaDepartment of Chemical and Biological Engineering, Korea University, Seoul 02841, KoreaAdvanced Analysis Center, Korea Institute of Science and Technology (KIST), Seoul 02792, KoreaAdvanced Analysis Center, Korea Institute of Science and Technology (KIST), Seoul 02792, KoreaMaterials Architecturing Research Center, Korea Institute of Science and Technology, Seoul 02792, KoreaDepartment of Chemical and Biological Engineering, Korea University, Seoul 02841, KoreaDepartment of Chemical Engineering, College of Engineering, Kyung Hee University, Yongin 17140, KoreaThe selective enhancement of catalytic activity is a challenging task, as catalyst modification is generally accompanied by both desirable and undesirable properties. For example, in the case of the direct synthesis of hydrogen peroxide, Pt on Pd improves hydrogen conversion, but lowers hydrogen peroxide selectivity, whereas Au on Pd enhances hydrogen peroxide selectivity but decreases hydrogen conversion. Toward an ideal catalytic property, the development of a catalyst that is capable of improving H-H dissociation for increasing H<sub>2</sub> conversion, whilst suppressing O-O dissociation for high H<sub>2</sub>O<sub>2</sub> selectivity would be highly beneficial. Pd-core AuPt-bimetallic shell nanoparticles with a nano-sized bimetallic layer composed of Au-rich or Pt-rich content with Pd cubes were readily prepared via the direct seed-mediated growth method. In the Pd-core AuPt-bimetallic shell nanoparticles, Au was predominantly located on the {100} facets of the Pd nanocubes, whereas Pt was deposited on the corners of the Pd nanocubes. The evaluation of Pd-core AuPt-bimetallic shell nanoparticles with varying Au and Pt contents revealed that Pd-core AuPt-bimetallic shell that was composed of 2.5 mol% Au and 5 mol% Pt, in relation to Pd, exhibited the highest H<sub>2</sub>O<sub>2</sub> production rate (914 mmol H<sub>2</sub>O<sub>2</sub> g<sub>metal</sub><sup>−1</sup> h<sup>−1</sup>), due to the improvement of both H<sub>2</sub>O<sub>2</sub> selectivity and H<sub>2</sub> conversion.https://www.mdpi.com/2073-4344/10/6/650bimetallic shelldirect synthesis of H<sub>2</sub>O<sub>2</sub>shell controlcore–shellmild conditionfast-screening |
spellingShingle | Geun-Ho Han Ki Yoon Kim Hyunji Nam Hyeonjin Kim Jihwan Yoon Jung-Hyun Lee Hong-Kyu Kim Jae-Pyoung Ahn Seung Yong Lee Kwan-Young Lee Taekyung Yu Facile Direct Seed-Mediated Growth of AuPt Bimetallic Shell on the Surface of Pd Nanocubes and Application for Direct H<sub>2</sub>O<sub>2</sub> Synthesis Catalysts bimetallic shell direct synthesis of H<sub>2</sub>O<sub>2</sub> shell control core–shell mild condition fast-screening |
title | Facile Direct Seed-Mediated Growth of AuPt Bimetallic Shell on the Surface of Pd Nanocubes and Application for Direct H<sub>2</sub>O<sub>2</sub> Synthesis |
title_full | Facile Direct Seed-Mediated Growth of AuPt Bimetallic Shell on the Surface of Pd Nanocubes and Application for Direct H<sub>2</sub>O<sub>2</sub> Synthesis |
title_fullStr | Facile Direct Seed-Mediated Growth of AuPt Bimetallic Shell on the Surface of Pd Nanocubes and Application for Direct H<sub>2</sub>O<sub>2</sub> Synthesis |
title_full_unstemmed | Facile Direct Seed-Mediated Growth of AuPt Bimetallic Shell on the Surface of Pd Nanocubes and Application for Direct H<sub>2</sub>O<sub>2</sub> Synthesis |
title_short | Facile Direct Seed-Mediated Growth of AuPt Bimetallic Shell on the Surface of Pd Nanocubes and Application for Direct H<sub>2</sub>O<sub>2</sub> Synthesis |
title_sort | facile direct seed mediated growth of aupt bimetallic shell on the surface of pd nanocubes and application for direct h sub 2 sub o sub 2 sub synthesis |
topic | bimetallic shell direct synthesis of H<sub>2</sub>O<sub>2</sub> shell control core–shell mild condition fast-screening |
url | https://www.mdpi.com/2073-4344/10/6/650 |
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