Synthesis of Pt Double-Walled Nanoframes with Well-Defined and Controllable Facets,ACS Nano

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Synthesis of Pt Double-Walled Nanoframes with Well-Defined and Controllable Facets
ACS Nano ( IF 15.8 ) Pub Date : 2022-12-06 , DOI: 10.1021/acsnano.2c09349
MohammadNavid Haddadnezhad ₁ , Woocheol Park ₁ , Insub Jung _{1,

2} , Hajir Hilal ₁ , Jeongwon Kim ₁ , Sungjae Yoo ₁ , Qiang Zhao ₁ , Soohyun Lee ₁ , Jaewon Lee ₁ , Sungwoo Lee _{1,

2} , Sungho Park ₁

Affiliation

In this paper, we demonstrate the synthesis of morphologically complex nanoframes wherein a mixture of frames and thin solid planes, which we refer to as walled-nanoframes, are present in a single particle. By applying multiple chemical steps including shape evolution of Au nanocrystals and controlling chemical potential of solution for selective deposition, we successfully designed a variety of Pt nanoframes including Pt cuboctahedral nanoframes and Pt single-walled nanoframes. The rationale for on-demand chemical steps with well-faceted Au overgrowth allowed for the synthesis of double-walled nanoframes where two Pt single-walled nanoframes are concentrically overlapped in a single entity with a clearly discernible gap between the two nanoframes. Given the coexistence of an open structure of nanoframe and thin plates within one entity, the double-walled nanoframes showed a dramatic increase in catalytic activity toward the methanol oxidation reaction, acting as high-surface area, carbon-free, and volume-compact nanocatalysts.

中文翻译：

具有明确定义和可控刻面的 Pt 双壁纳米框架的合成

在本文中，我们展示了形态复杂的纳米框架的合成，其中框架和薄实心平面的混合物（我们称之为壁纳米框架）存在于单个粒子中。通过应用多个化学步骤，包括 Au 纳米晶体的形状演变和控制选择性沉积溶液的化学势，我们成功设计了多种 Pt 纳米框架，包括 Pt 立方八面体纳米框架和 Pt 单壁纳米框架。按需化学步骤和多面 Au 过度生长的基本原理允许合成双壁纳米框架，其中两个 Pt 单壁纳米框架同心重叠在一个实体中，两个纳米框架之间有明显的间隙。鉴于在一个实体内同时存在纳米框架和薄板的开放结构，

更新日期：2022-12-06

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