Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 265, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2020.118606
Keywords
Pt skin; Electronic structure modification; PtAg alloy; Nanotubes; Methanol oxidation reaction
Funding
- Key Research and Development Plan of Shandong Province [2018GGX102019]
- Natural Science Foundation of Shandong Province [ZR2017BB022]
- CAS Key Laboratory of Low-Coal Conversion Science & Engineering, China (SARI, CAS) [KLLCCSE-201706]
- Natural Science Foundation of Chongqing [cstc2019jcyj-msxmX0670]
- Natural Science Foundation of Yongchuan [Ycstc2019nb0602]
- Applied Basic Research Program of Qingdao [18-2-2-5-jch]
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The modification of electronic structure can significantly affect electrocatalytic activity. An architecture art of Pt-skinned PtAg bimetallic nanotubes is successfully synthesized, delivering much higher catalytic activity and better stability toward methanol electrooxidation than PtAg bimetallic nanoparticles and commercial Pt/C catalysts. Theoretical studies reveal that the Pt skin on PtAg bimetallic nanotubes prominently optimize the electronic structure of Pt to greatly enhance the dissociative adsorption of methanol while increasing CO poisoning resistance for fast electrode kinetics, high catalytic current density and stability. This work offers a low Pt loading but highly active anode catalyst for direct methanol fuel cells, demonstrating that rationally tuning the electronic structure by well-controlling surface morphology in nanoscales could open new opportunities to greatly improve the electrocatalytic properties.
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