文献类型：期刊文献

英文题名：Platinum-copper nanowire networks with enhanced CO tolerance toward methanol oxidation electrocatalysis

作者：Xing, Shiyue[1];Liu, Zhongliang[1];Jiang, Yingfang[1];Tang, Pinghui[1];Zhang, Jian[1];Chen, Jiatang[2];Li, Huihui[1];Li, Chunzhong[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, Minist Educ, Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China;[2]Cornell Univ, Wilson Lab, Cornell High Energy Synchrotron Source, Ithaca, NY 14853 USA

年份：2025

卷号：16

期号：21

起止页码：9311

外文期刊名：CHEMICAL SCIENCE

收录：;EI(收录号：20251718310291);WOS:【SCI-EXPANDED(收录号:WOS:001474098700001)】；

基金：This work was supported by the National Natural Science Foundation of China (U22B20143, U24A20546, and 22478121), the Shanghai Municipal Science and Technology Major Project, and the Science and Technology Commission of Shanghai Municipality (22dz1205900).

语种：英文

外文关键词：Bioremediation - Copper alloys - Copper compounds - Direct methanol fuel cells (DMFC) - Electrolysis - Methanol fuels - Nanowires - Platinum - Platinum alloys - Platinum compounds

摘要：Developing platinum-based electrocatalysts with high CO tolerance for the methanol oxidation reaction (MOR) is crucial for the practical application of direct methanol fuel cells (DMFCs). Herein, we employed a straightforward one-step method to synthesize PtxCuy network nanowires (NWNs), which exhibit the advantages of structural stability and bimetallic ensembles. The synergistic effect of compressive strain and the ligand effect, induced by Cu incorporation, can effectively lower the d-band center of Pt, thereby weakening the adsorption strength of CO on the catalyst surface. The optimized Pt42Cu58 NWNs deliver a peak mass activity of 1.33 A mgPt-1 and a specific activity of 4.43 mA cm-2 for the MOR, which are 3.03 and 4.03 times higher than those of commercial Pt/C, respectively. The CO stripping and in situ Fourier transform infrared spectroscopy results indicate their high anti-CO poisoning ability and methanol activation capacity. Moreover, the Pt42Cu58 NWNs also exhibit an excellent stability with high current densities observed after 3600 s of operation due to the enhanced CO tolerance and the stable three-dimensional (3D) network structure. This work provides a feasible strategy to suppress CO poisoning during the MOR and obtain highly efficient anode catalysts with enhanced durability in the DMFC field.