Colloidal Nanocomposite of TiN and N-Doped Few-Layer Graphene for Plasmonics and Electrocatalysis,ACS Energy Letters

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Colloidal Nanocomposite of TiN and N-Doped Few-Layer Graphene for Plasmonics and Electrocatalysis
ACS Energy Letters ( IF 19.3 ) Pub Date : 2017-09-11 00:00:00 , DOI: 10.1021/acsenergylett.7b00741
G. Shiva Shanker , Ganesh B. Markad , Metikoti Jagadeeswararao , Umesh Bansode ₁ , Angshuman Nag

Affiliation

A combination of high carrier density, high surface area, solution processability, and low cost is desired in a material for electrocatalytic applications, including H₂ evolution and a counter electrode of a solar cell. Also, plasmonic-based applications in biological systems can be derived from such material. In this regard, a colloidal nanocomposite of TiN and N-doped few-layer graphene (TiN–NFG) is synthesized from molecular precursors. TiN nanocrystals (NCs) provide free electrons for electrical conductivity and plasmonics, whereas NFG is responsible for charge transport, high surface area, and colloidal stability. Colloidal TiN–NFG nanocomposites exhibit a localized surface plasmon resonance band at around 700 nm. Coatings of the nanocomposite form a counter electrode for efficient (8.9%) dye-sensitized solar cells. Furthermore, the nanocomposite acts as an efficient electrocatalyst for hydrogen evolution reaction, exhibiting an overpotential ∼161 mV at a current density of 10 mA/cm².

中文翻译：

TiN和N掺杂的几层石墨烯的胶体纳米复合材料用于等离子体和电催化

在包括H _2的用于电催化应用的材料中，需要高载流子密度，高表面积，溶液可加工性和低成本的组合。演化和太阳能电池的对电极。同样，生物系统中基于等离子的应用可以源自这种材料。在这方面，由分子前体合成了TiN和N掺杂的几层石墨烯（TiN-NFG）的胶体纳米复合材料。TiN纳米晶体（NC）为导电性和等离激元提供自由电子，而NFG负责电荷传输，高表面积和胶体稳定性。TiN–NFG胶体纳米复合材料在700 nm左右具有局部表面等离振子共振带。纳米复合材料的涂层形成对电极，用于高效（8.9％）染料敏化太阳能电池。此外，该纳米复合材料还可以作为有效的氢生成反应电催化剂，在电流密度为10 mA / cm时显示出约161 mV的超电势。²。

更新日期：2017-09-11

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