Facile preparation of porous palladium nanocubes via a one-pot process induced by 1-hexadecyl-3-methyl imidazolium bromide for methanol electro-oxidation,New Journal of Chemistry

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Facile preparation of porous palladium nanocubes via a one-pot process induced by 1-hexadecyl-3-methyl imidazolium bromide for methanol electro-oxidation
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2020/03/26 , DOI: 10.1039/d0nj00130a
Zelin Cui _{1,

2,

3,

4} , Xuefeng Bai _{1,

2,

3,

4,

5} , Teng Liu _{3,

4,

5,

6}

Affiliation

Palladium nanoparticles with a uniform shape and specific surface structure have gained tremendous attention owing to their fascinating catalytic performance. Herein, Pd porous nanocubes (PdPNs) were successfully synthesized through a facile one-pot non-seeded routine using 1-hexadecyl-3-methyl imidazolium bromide (HMIB) as the capping agent. The as-prepared PdPNs had a cubic shape and highly porous feature with an average size of 45.4 nm. The morphology evolution along with time was investigated by transmission electron microscopy and a possible formation mechanism of PdPNs was proposed. The effects of the concentration of HMIB and temperature on the structure and electrocatalytic activity were also investigated. The PdPNs showed superior catalytic activity (j_f = 13.11 mA cm⁻²) in methanol electro-oxidation in an alkaline medium to solid Pd nanocubes (j_f = 7.25 mA cm⁻²) and a commercial Pd/C catalyst (j_f = 0.11 mA cm⁻²). Meanwhile, PdPNs exhibited excellent stability, which was inferred from the current density remaining at 86.3% of the initial value after 1500 cycles.

中文翻译：

通过1-十六烷基-3-甲基咪唑鎓溴化物诱导的一锅法轻松制备多孔钯纳米晶用于甲醇电氧化

具有均匀形状和特定表面结构的钯纳米颗粒由于其引人入胜的催化性能而备受关注。本文中，使用1-十六烷基-3-甲基咪唑鎓溴化物（HMIB）作为封端剂，通过简便的一锅式非播种程序成功合成了Pd多孔纳米立方体（PdPNs）。所制备的PdPNs具有立方体形状和高度多孔的特征，平均尺寸为45.4 nm。用透射电子显微镜研究了随时间变化的形貌，并提出了可能的PdPNs形成机理。还研究了HMIB的浓度和温度对结构和电催化活性的影响。PdPNs显示出优异的催化活性（j _f = 13.11 mA cm ^-2）在甲醇中在碱性介质中电氧化成固体Pd纳米立方体（j _f = 7.25 mA cm ^-2）和市售Pd / C催化剂（j _f = 0.11 mA cm ^-2）。同时，PdPNs表现出优异的稳定性，这是由1500次循环后保持在初始值的86.3％的电流密度得出的。

更新日期：2020-04-06

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