Reduced Graphene Oxide-Modified Carbon Nanotube/Polyimide Film Supported MoS2 Nanoparticles for Electrocatalytic Hydrogen Evolution
Reduced Graphene Oxide-Modified Carbon Nanotube/Polyimide Film Supported MoS2 Nanoparticles for Electrocatalytic Hydrogen Evolution
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还原氧化石墨烯改性碳纳米管/聚酰亚胺薄膜负载MoS2纳米粒子用于电催化析氢
DOI：
10.1002/adfm.201500194
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发表时间：
2015-05-13
影响因子：
19
通讯作者：
Wang, Chunming
中科院分区：
文献类型：
--
作者：
Jiang, Yimin;Li, Xin;Wang, Chunming
在低过电位下通过电催化有效地析氢为清洁能源带来了巨大的希望。本文中，将高活性和稳定的MoS 2电催化剂负载在还原的氧化石墨烯改性的碳纳米管/聚酰亚胺（PI/CNT-RGO）膜上用于析氢反应（HER）。PI/CNT-RGO膜允许MoS 2纳米颗粒在其表面上紧密生长。MoS 2纳米粒子的纳米尺寸和高分散性提供了大量可用的边缘位点，并且RGO和MoS 2的偶联增强了边缘位点与基底之间的电子转移，大大提高了PI/CNT-RGO-MoS 2膜的HER活性。在PI/CNT-RGO膜上负载量小于0.04 mg cm（-2）的MoS 2表现出优异的HER活性，具有0.09 V的低过电位和大电流密度，以及良好的稳定性。Tafel斜率为61 mV dec（-1），揭示了HER的Volmer-Heyrovsky机理，为设计高效的MoS 2基HER电催化剂提供了一条潜在的途径。
Efficient evolution of hydrogen through electrocatalysis at low overpotentials holds tremendous promise for clean energy. Herein, a highly active and stable MoS2 electrocatalyst is supported on reduced graphene oxide-modified carbon nanotube/polyimide (PI/CNT-RGO) film for hydrogen evolution reaction ( HER). The PI/CNT-RGO film allows the intimate growth of MoS2 nanoparticles on its surface. The nanosize and high dispersion of MoS2 nanoparticles provide a vast amount of available edge sites and the coupling of RGO and MoS2 enhances the electron transfer between the edge sites and the substrate, greatly improving the HER activity of PI/CNT-RGO-MoS2 film. The MoS2 with a smaller loading less than 0.04 mg cm(-2) on the PI/CNT-RGO film exhibits excellent HER activities with a low overpotential of 0.09 V and large current densities, as well as good stability. The Tafel slope of 61 mV dec(-1) reveals the Volmer-Heyrovsky mechanism for HER. Thus, this work paves a potential pathway for designing efficient MoS2-based electrocatalysts for HER.