Synthesis of single crystalline two-dimensional transition-metal phosphides via a salt-templating method†,Nanoscale

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Synthesis of single crystalline two-dimensional transition-metal phosphides via a salt-templating method†
Nanoscale ( IF 5.8 ) Pub Date : 2018-04-04 00:00:00 , DOI: 10.1039/c8nr01556b
Tianqi Li _{1,

2,

3,

4} , Hongrun Jin _{1,

2,

3,

4} , Zhun Liang _{2,

3,

5,

6,

7} , Liang Huang _{1,

2,

3,

4} , Yucheng Lu _{1,

2,

3,

4} , Huimin Yu _{1,

2,

3,

4} , Zhimi Hu _{1,

2,

3,

4} , Jiabin Wu _{1,

2,

3,

4} , Bao Yu Xia _{2,

3,

8,

9,

10} , Guang Feng _{2,

3,

5,

6,

7} , Jun Zhou _{1,

2,

3,

4}

Affiliation

Transition-metal phosphides (TMPs) are considered as promising non-noble electrochemical catalysts for hydrogen evolution reaction (HER). Their highly active sites are located on certain facets, and single crystalline two-dimensional (2D) structures enable them to expose the most active facets for HER. However, the synthesis of single crystalline 2D TMPs is still a challenge owing to their intrinsically non-layered structures. Herein, we demonstrate the synthesis of various single crystalline 2D TMPs (Co₂P, MoP₂, Ni1₂P₅ and WP₂) by a salt-templating method. The as-synthesized 2D Co₂P exhibited efficient electrocatalytic ability for HER with an overpotential of 41 mV at 10 mA cm⁻² and a Tafel slope of 35 mV dec⁻¹ in 0.5 M H₂SO₄ solution. We expect that the synthesis of 2D TMPs reported here will open the way to expand the family of 2D materials for electrocatalysis and beyond.

中文翻译：

通过盐模板法合成单晶二维过渡金属磷化物†

过渡金属磷化物（TMP）被认为是有前途的非贵金属电化学催化剂，用于放氢反应（HER）。它们的高活性位点位于某些刻面上，单晶二维（2D）结构使它们能够暴露出HER活性最强的刻面。然而，由于其固有的非层状结构，单晶2D TMP的合成仍然是一个挑战。在这里，我们演示了通过盐模板法合成各种单晶2D TMPs（Co ₂ P，MoP ₂，Ni1 ₂ P ₅和WP ₂）。合成后的2D Co ₂ P对HER表现出有效的电催化能力，在10 mA cm时的过电势为41 mV在0.5 MH₂ SO₄溶液中，^-2和Tafel斜率为35 mV dec^-1。我们希望这里报道的2D TMP的合成将为扩展2D材料系列提供新的途径，以用于电催化及其他领域。

更新日期：2018-04-04

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