Ultrathin palladium nanosheets with selectively controlled surface facets†,Chemical Science

当前位置： X-MOL 学术 › Chem. Sci. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Ultrathin palladium nanosheets with selectively controlled surface facets†
Chemical Science ( IF 7.6 ) Pub Date : 2018-04-02 00:00:00 , DOI: 10.1039/c8sc00605a
Dongdong Xu _{1,

2,

3,

4,

5} , Xiaoli Liu _{1,

2,

3,

4,

5} , Hao Lv _{1,

2,

3,

4,

5} , Ying Liu _{1,

2,

3,

4,

5} , Shulin Zhao _{1,

2,

3,

4,

5} , Min Han _{1,

2,

3,

4,

5} , Jianchun Bao _{1,

2,

3,

4,

5} , Jie He _{6,

7,

8,

9} , Ben Liu _{1,

2,

3,

4,

5}

Affiliation

We report a facile bottom-up synthetic approach to preparing ultrathin two-dimensional (2D) palladium nanosheets (PdNSs) with selectively exposed surface facets. Our synthetic strategy is based on the utilization of the nanoconfined lamellar mesophases of amphiphilic functional surfactants to template the growth of PdNSs in aqueous solution. Preferential adsorption of functional groups (e.g., COOH, pyridyl and quaternary ammonium) and halide counter ions (e.g., Br⁻ and Cl⁻) in the long-chain surfactants onto different Pd planes results in the epitaxial growth of {100}, {110} and {111}-exposed surface facets of ultrathin PdNSs. Our synthetic approach is a general, powerful and scalable method to precisely control the surface facets of ultrathin 2D PdNSs, thus providing an opportunity to evaluate facet-dependent catalytic performance of Pd nanocrystals. Ultrathin PdNSs have been examined as the electrocatalysts for hydrogen evolution reactions (HERs). We show that {100}-exposed PdNSs display superior catalytic activity and stability for HERs, compared to that of {110} and {111}-exposed ones as well as their bulk counterparts. Conceivably, our findings will offer a general guideline in rational design of surfactant templates for other 2D metal nanosheets.

中文翻译：

具有可选择性控制的表面小面的超薄钯纳米片†

我们报告了一种简便的自下而上的合成方法，以制备具有选择性暴露的表面小面的超薄二维（2D）钯纳米片（PdNSs）。我们的合成策略是基于利用两亲性功能性表面活性剂的纳米级层状中间相来模板化PdNSs在水溶液中的生长。优先吸附的官能团（例如，COOH基，吡啶基和季铵）和卤化物的抗衡离子（例如，溴^-和Cl ^-）在长链表面活性剂上到不同的Pd平面上，导致{100}，{110}和{111}暴露的超薄PdNSs的表面刻面外延生长。我们的合成方法是一种通用，功能强大且可扩展的方法，可精确控制超薄2D PdNS的表面刻面，从而为评估Pd纳米晶体的刻面依赖性催化性能提供了机会。超薄PdNSs已作为氢析出反应（HERs）的电催化剂进行了研究。我们显示，与{110}和{111}暴露的PdNS及其大量类似物相比，{100}暴露的PdNSs对HERs显示出优异的催化活性和稳定性。可以想象，我们的发现将为合理设计其他2D金属纳米片的表面活性剂模板提供一般指导。

更新日期：2018-04-02

点击分享查看原文

点击收藏

公开下载

阅读更多本刊最新论文本刊介绍/投稿指南11