铜@铂双金属纳米粒子的声化学合成

Sonochemical Synthesis of Cu@Pt Bimetallic Nanoparticles.

作者信息

Hansen Henrik E, Fakhri Daniel Ø, Seland Frode, Sunde Svein, Burheim Odne S, Pollet Bruno G

机构信息

Electrochemistry Group, Department of Materials Science and Engineering, Faculty of Natural Sciences, Norwegian University of Science and Technology (NTNU), NO-7491 Trondheim, Norway.

Hydrogen Energy and Sonochemistry Research Group, Department of Energy and Process Engineering, Faculty of Engineering, Norwegian University of Science and Technology (NTNU), NO-7491 Trondheim, Norway.

出版信息

Molecules. 2022 Aug 18;27(16):5281. doi: 10.3390/molecules27165281.

DOI:10.3390/molecules27165281

PMID:36014518

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9415347/

Abstract

Reducing the amount of noble metals in catalysts for electrochemical conversion devices is paramount if these devices are to be commercialized. Taking advantage of the high degree of particle property control displayed by the sonochemical method, we set out to synthesize Cu@Pt bimetallic nanocatalysts in an effort to improve the mass activity towards the hydrogen evolution reaction. At least 17 times higher mass activity was found for the carbon supported Cu@Pt bimetallic nanocatalyst (737 mA mg−1, E = −20 mV) compared to carbon supported Pt nanocatalysts prepared with the same ultrasound conditions (44 mA mg−1, E = −20 mV). The synthesis was found to proceed with the sonochemical formation of Cu and Cu2O nanoparticles with the addition of PtCl4 leading to galvanic displacement of the Cu-nanoparticles and the formation of a Pt-shell around the Cu-core.

摘要

如果要将电化学转换装置商业化，减少其催化剂中贵金属的用量至关重要。利用声化学方法所展现出的高度粒子性质可控性，我们着手合成铜@铂双金属纳米催化剂，以提高析氢反应的质量活性。结果发现，在相同超声条件下制备的碳载铂纳米催化剂（44 mA mg−1，E = −20 mV）相比，碳载铜@铂双金属纳米催化剂（737 mA mg−1，E = −20 mV）的质量活性至少高17倍。研究发现，在加入四氯化铂的情况下，通过声化学法形成铜和氧化亚铜纳米颗粒，进而导致铜纳米颗粒发生电偶置换，并在铜核周围形成铂壳，从而进行合成。