Pt-Richcore /Sn-Richsubsurface /Ptskin Nanocubes As Highly Active and Stable Electrocatalysts for the Ethanol Oxidation Reaction

Journal of the American Chemical Society
Rubén RizoHéctor D Abruña

Abstract

Direct ethanol fuel cells are one of the most promising electrochemical energy conversion devices for portable, mobile and stationary power applications. However, more efficient and stable and less expensive electrocatalysts are still required. Interestingly, the electrochemical performance of the electrocatalysts toward the ethanol oxidation reaction can be remarkably enhanced by exploiting the benefits of structural and compositional sensitivity and control. Here, we describe the synthesis, characterization, and electrochemical behavior of cubic Pt-Sn nanoparticles. The electrochemical activity of the cubic Pt-Sn nanoparticles was found to be about three times higher than that obtained with unshaped Pt-Sn nanoparticles and six times higher than that of Pt nanocubes. In addition, stability tests indicated the electrocatalyst preserves its morphology and remains well-dispersed on the carbon support after 5000 potential cycles, while a cubic (pure) Pt catalyst exhibited severe agglomeration of the nanoparticles after a similar stability testing protocol. A detailed analysis of the elemental distribution in the nanoparticles by STEM-EELS indicated that Sn dissolves from the outer part of the shell after potential cycling, forming...Continue Reading

Citations

Mar 6, 2019·ChemSusChem·Juan BaiYu Chen
Sep 29, 2020·Nanoscale·Junming ZhangShigang Sun
Oct 27, 2020·Chemical Communications : Chem Comm·Paula Sebastián-PascualMaría Escudero-Escribano
May 1, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Marta Wala, Wojciech Simka
Jun 9, 2021·Chemical Society Reviews·Hang YinZongyou Yin
Jun 14, 2019·ACS Applied Materials & Interfaces·Grzegorz GruzełMagdalena Parlinska-Wojtan
Aug 18, 2018·Journal of the American Chemical Society·Jiawei ZhangZhaoxiong Xie
Dec 29, 2020·ACS Catalysis·Clara RettenmaierBeatriz Roldan Cuenya
Jul 2, 2019·ACS Energy Letters·Rubén Rizo, Beatriz Roldan Cuenya
May 28, 2019·Journal of the American Chemical Society·Zhixiu LiangJia X Wang
Sep 18, 2021·ACS Applied Materials & Interfaces·Yonghyeon KimSang Woo Han
Nov 18, 2021·Chemistry : a European Journal·Zhiping ZhengZhaoxiong Xie

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