This title appears in the Scientific Report :
2020
Please use the identifier:
http://dx.doi.org/10.1021/acs.chemmater.9b02824 in citations.
Composition-Tuned Pt-Skinned PtNi Bimetallic Clusters as Highly Efficient Methanol Dehydrogenation Catalysts
Composition-Tuned Pt-Skinned PtNi Bimetallic Clusters as Highly Efficient Methanol Dehydrogenation Catalysts
Platinum is the most active anode and cathode catalyst in next-generation fuel cells using methanol as liquid source of hydrogen. Its catalytic activity can be significantly improved by alloying with 3d metals, although a precise tuning of its surface architecture is still required. Herein, we repor...
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Personal Name(s): | Liao, Ting-Wei (Corresponding author) |
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Yadav, Anupam / Ferrari, Piero / Niu, Yubiao / Wei, Xian-Kui / Vernieres, Jerome / Hu, Kuo-Juei / Heggen, Marc / Dunin-Borkowski, Rafal E. / Palmer, Richard E. / Laasonen, Kari / Grandjean, Didier / Janssens, Ewald / Lievens, Peter | |
Contributing Institute: |
Mikrostrukturforschung; PGI-5 Physik Nanoskaliger Systeme; ER-C-1 |
Published in: | Chemistry of materials, 31 (2019) 24, S. 10040 - 10048 |
Imprint: |
Washington, DC
American Chemical Society
2019
|
DOI: |
10.1021/acs.chemmater.9b02824 |
Document Type: |
Journal Article |
Research Program: |
Towards Replacement of Critical Catalyst Materials by Improved Nanoparticle Control and Rational Design Controlling Configuration-Based Phenomena |
Publikationsportal JuSER |
Platinum is the most active anode and cathode catalyst in next-generation fuel cells using methanol as liquid source of hydrogen. Its catalytic activity can be significantly improved by alloying with 3d metals, although a precise tuning of its surface architecture is still required. Herein, we report the design of a highly active low-temperature (below 0 °C) methanol dehydrogenation anode catalyst with reduced CO poisoning based on ultralow amount of precisely defined PtxNi1–x (x = 0 to 1) bimetallic clusters (BCs) deposited on inert flat oxides by cluster beam deposition. These BCs feature clear composition-dependent atomic arrangements and electronic structures stemming from their nucleation mechanism, which are responsible for a volcano-type activity trend peaking at the Pt0.7Ni0.3 composition. Our calculations reveal that at this composition, a cluster skin of Pt atoms with d-band centers downshifted by subsurface Ni atoms weakens the CO interaction that in turn triggers a significant increase in the methanol dehydrogenation activity. |