Degradation-resistant waste plastics derived carbon supported MoS2 electrocatalyst: high-nitrogen dependent activity for hydrogen evolution reaction
Degradation-resistant waste plastics derived carbon supported MoS2 electrocatalyst: high-nitrogen dependent activity for hydrogen evolution reaction
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抗降解废塑料衍生的碳负载MoS2电催化剂：析氢反应的高氮依赖性活性
DOI：
10.1016/j.electacta.2019.135436
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发表时间：
2020
影响因子：
6.6
通讯作者：
Qiao Shanlin
中科院分区：
文献类型：
--
作者：
Zhao Ying;Zhao Jia;Li Qing;Gu Chuantao;Zhang Boying;Liu Caihong;Li Zheng;Hu Shuozhen;Qiao Shanlin
设计一种简单、低成本、高活性的催化剂用于电解水制氢的工业化生产仍然是一个巨大的挑战。本文报道了以工业废塑料（三聚氰胺（CWM）和聚氨酯（CWPU））为原料，通过简单的水热反应制备高氮掺杂的碳载体负载二硫化钼（MoS 2）。催化活性高的MoS_2纳米片层在水煤浆和CWPU上的分散程度较低。高吡啶氮含量的载体不仅可以大大提高MoS 2纳米片的导电性，而且可以提供额外的活性中心。MoS 2纳米片与水煤浆和CWPU之间的协同效应有助于提高析氢反应（HER）活性。随着N掺杂浓度的增加，MoS 2基催化剂的HER性能得到改善。在酸性条件下，含氮量最高（11.1wt%）的MoS 2/CWM 1：1催化剂的过电位最低，为56 mV（10 mA cm−2），Tafel斜率最小，为36.6 mV·dec−1，交换电流密度最高，为0.35 mA cm− 2，与市售20%Pt/C催化剂相当。
It is still a great challenge to design a simple, low-cost and highly active catalyst for the industrial production of hydrogen from water electrolysis. Herein, we report a synthesis of molybdenum disulphide (MoS2) supported on carbon supports with high concentration of doped-nitrogen derived from large scale industrial waste plastics, i.e. melamine (CWM) and polyurethane (CWPU), by a simple hydrothermal reaction. Few layers of MoS2nanosheets with high catalytic activity can be very-well dispersed on CWM and CWPU. The supports with high‒nitrogen content can not only greatly improve the conductivity of supported MoS2nanosheets, but also provide additional active sites with the presence of high pyridinic‒N content. The synergistic effects between the MoS2nanosheet and CWM and CWPU contribute to high hydrogen evolution reaction (HER) activity. As the concentration of doped-N increases, the HER performance of MoS2-based catalysts is improved. MoS2/CWM 1:1 with the highest nitrogen content (11.1 wt %) shows the lowest overpotential of 56 mV at 10 mA cm−2, the smallest Tafel slope of 36.6 mV·dec−1, and the highest exchange current density of 0.35 mA cm−2in acidic condition, which are comparable to that of commercial 20% Pt/C.