Bifunctional Electrocatalyst with 0D/2D Heterostructure for Highly Efficient Hydrogen and Oxygen Generation.,Chemistry - An Asian Journal

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Bifunctional Electrocatalyst with 0D/2D Heterostructure for Highly Efficient Hydrogen and Oxygen Generation.
Chemistry - An Asian Journal ( IF 3.5 ) Pub Date : 2020-07-17 , DOI: 10.1002/asia.202000419
Xueping Yu ₁ , Chan Yang ₁ , Shan Zhang ₁ , Yonglei Xing ₁ , Chuntai Liu ₂ , Juan Peng _{1,

3} , Qingyu Yan ₃

Affiliation

A novel MoS₂ quantum dots/CoSe₂ nanosheet (MoS₂ QDs/CoSe₂) hybrid with 0D/2D heterostructure has been developed. The CoSe₂ nanosheets (NSs) enable an excellent oxygen evolution reaction (OER) activity with increasing vacancy configuration on one hand, while the MoS₂ QDs serve as an eminent hydrogen evolution reaction (HER) catalyst on the other. By integrating MoS₂ QDs and CoSe₂ NSs, the hybrid exhibits excellent electrocatalytic performances in HER and OER. The unique 0D/2D hetero‐interface increases the exposed active sites and facilitates electron transfer, thereby boosting the electrocatalytic activity. Relatively low overpotentials of 82 mV and 280 mV are required to drive the current density of 10 mA/cm² for HER and OER, with corresponding Tafel slopes of 69 and 75 mV/dec, respectively. As such, this work provides an efficient yet simple approach to construct bifunctional electrocatalysts with enhanced activity and stability.

中文翻译：

具有0D / 2D异质结构的双功能电催化剂，可高效产生氢气和氧气。

开发了一种新型的具有0D / 2D异质结构的MoS ₂量子点/ CoSe ₂纳米片（MoS ₂ QDs / CoSe ₂）杂化体。CoSe ₂纳米片（NSs）一方面具有出色的氧释放反应（OER）活性，同时空位构型增加，而MoS ₂ QD则可以用作显着的氢释放反应（HER）催化剂。通过集成MoS ₂ QD和CoSe ₂NSs，该杂化物在HER和OER中表现出优异的电催化性能。独特的0D / 2D异质界面可增加暴露的活性位并促进电子转移，从而增强电催化活性。为了驱动HER和OER的10 mA / cm ²的电流密度，需要82 mV和280 mV的相对较低的过电势，相应的Tafel斜率分别为69 mV / dec和75 mV / dec。这样，这项工作提供了一种有效而简单的方法来构建具有增强的活性和稳定性的双功能电催化剂。

更新日期：2020-09-14

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