Tailoring 2D MoS2 heterointerfaces for promising oxygen reduction reaction electrocatalysis,Journal of Materials Chemistry A

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Tailoring 2D MoS2 heterointerfaces for promising oxygen reduction reaction electrocatalysis
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2019-03-19 , DOI: 10.1039/c9ta01321k
Jianxin Mao _{1,

2,

3,

4} , Peng Liu _{1,

2,

3,

4} , Cuicui Du _{1,

2,

3,

4} , Dongxue Liang _{1,

2,

3,

4} , Jianyue Yan _{1,

2,

3,

4} , Wenbo Song _{1,

2,

3,

4}

Affiliation

Two-dimensional MoS₂ has been proposed to be an effective low-cost electrocatalyst for the oxygen reduction reaction (ORR) due to its appropriate electronic configuration. However, the catalytic activity of pristine MoS₂ is still far from what is expected. Herein, we rationally synthesize ultrathin Ni₃S₂/MoS₂ heterostructured nanosheets for a direct 4-electron transfer ORR. A half-wave potential of 0.885 V (versus the reversible hydrogen electrode (RHE)) is achieved in 0.1 M KOH, which is 22 mV more positive than that of commercial 20 wt% Pt/C. The abundant heterointerfaces in Ni₃S₂/MoS₂ not only provide numerous highly active Mo edges/Mo–Ni–S sites and accelerate charge transport but also enable the binding of more oxygen-containing intermediates. This work is expected to inspire the design of advanced MoS₂-based materials for diverse applications.

中文翻译：

量身定制2D MoS ₂异质界面以实现有希望的氧还原反应电催化

二维MoS ₂由于其适当的电子构型已被提出是用于氧还原反应（ORR）的有效的低成本电催化剂。然而，原始的MoS ₂的催化活性仍远未达到预期。在这里，我们合理地合成了超薄的Ni ₃ S ₂ / MoS ₂异质结构纳米片，用于直接的4电子转移ORR。在0.1 M KOH中实现了0.885 V的半波电势（相对于可逆氢电极（RHE）），这比市售20 wt％Pt / C的正电势高22 mV。Ni ₃ S ₂ / MoS _2中的大量异质界面不仅提供了许多高活性的Mo边缘/ Mo-Ni-S位置，并加速了电荷传输，还使更多含氧的中间体结合在一起。预期这项工作将启发用于各种应用的先进的基于MoS ₂的材料的设计。

更新日期：2019-04-10

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