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论文类型：期刊论文

发表时间：2017-02-07

发表刊物：CATALYSIS SCIENCE & TECHNOLOGY

收录刊物：SCIE、EI

卷号：7

期号：3

页面范围：693-702

ISSN号：2044-4753

摘要：Graphene nanoribbons (GNRs) derived from the unzipping of carbon nanotubes are used as a catalyst carrier for MoS2 with different layers via a facile solution route. Efficient hydrodesulfurization (HDS) of carbonyl sulfide (COS) has been achieved over the MoS2/GNR composites. It is revealed that single layer MoS2 anchored on GNRs (SL-MoS2/GNRs) is successfully fabricated by the assistance of cetyltrimethylammonium bromide (CTAB). The catalytic activities of the SL-MoS2/GNRs, few-layer MoS2 supported on GNRs (FLMoS2/GNRs) and pure MoS2 with a multi-layer structure (ML-MoS2) are investigated, and the layerdependent catalytic activity of MoS2 has been demonstrated in the hydrogenation of COS. The order of the catalytic performance for the three catalysts is SL-MoS2/GNRs > FL-MoS2/GNRs > ML-MoS2, especially within a low temperature range (180-280 degrees C) of the HDS reaction. The superior catalytic activity of SLMoS2/GNRs can be ascribed to the high density of the active sites in single-layer MoS2. Due to the edge effect of GNRs, single layer MoS2 supported on GNRs is thinner and shorter than MoS2 anchored on graphene nanosheets (GS). The synergy between single layer MoS2 and GNRs may be mainly responsible for the better catalytic performance of SL-MoS2/GNRs. This work offers a feasible strategy for the synthesis of single-layer MoS2 supported on GNRs for efficient HDS application.