Production of core-shell structure is an effective strategy to increase the atomic utilization of shell metal in nanocrystals. Therefore, it is urgent to enhance the performance of electrocatalysts for EOR and simultaneously reduce the usage of Pt through rational design of compositions and structures. et al., 2019 Wang et al., 2019 Luo et al., 2020 Yang et al., 2021), leading to low efficiency in activity and poor durability. However, Pt-based catalysts suffers from scarce abundance and high price of Pt, and is prone to be poisoned by the byproducts (e.g., CO) generated during reaction ( Li J. Platinum (Pt) and Pt-based nanomaterials are considered to be the most promising catalysts towards the ethanol oxidation reaction (EOR) at the anode ( Kowal et al., 2009 Li et al., 2010 Sulaiman et al., 2017 Li M. Furthermore, ethanol takes the advantages of ease of storage and transportation of liquid fuels, avoiding some thorny problems caused by gaseous fuels (e.g., H 2) ( Kamarudin et al., 2013 Akhairi and Kamarudin, 2016). Ethanol, as a renewable source of energy, not only possesses high energy density, but also can be derived in large quantities from biomass. The theory calculations reveal that the introduction of Au core and alloying Pt with Sn both endow Pt with an appropriate d-band center, and thus effectively boosting the EOR activity.ĭirect ethanol fuel cells (DEFCs) have emerged as a competitive candidate among the energy conversion devices. 86.8% loss in mass activity after 1,000 s due to the stronger anti-poisoning ability for reaction intermediates. In addition, the core-shell NPs displayed the best stability compared to commercial Pt/C, with only 44.8% loss vs. Impressively, the core-shell NPs with hexagonal PtSn alloyed shells exhibited the highest mass activity and specific activity toward ethanol oxidation reaction (EOR) in alkaline electrolyte, which are 13.0 and 12.7 times higher than those of the commercial Pt/C. Here, we synthesized trimetallic xSn y core-shell nanoparticles (NPs) with tunable composition and structure of Pt-Sn alloyed shells. 3Zhejiang Provincial Key Laboratory of Power Semiconductor Materials and Devices, ZJU-Hangzhou Global Scientific and Technological Innovation Center, Hangzhou, Zhejiang, ChinaĬombining the core-shell structure with the optimization of surface composition and structure in the shell is a fantastic strategy to enhance the electrocatalytic performances.2Institute for Carbon Neutralization, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang, China.1State Key Laboratory of Silicon Materials and School of Materials Science and Engineering, Zhejiang University, Hangzhou, Zhejiang, China.Ningkang Qian 1 †, Liang Ji 1 †, Xiao Li 1, Jingbo Huang 1, Junjie Li 1, Xingqiao Wu 1,2*, Deren Yang 1 and Hui Zhang 1,3*
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