Synthesis of Ultrathin MoS(2)Nanosheets Embedded in 3D Hierarchically Nitrogen-and-Sulfur Co-Doped Porous Carbon Composites as Efficient Oxygen Reduction Reaction Catalyst
Synthesis of Ultrathin MoS(2)Nanosheets Embedded in 3D Hierarchically Nitrogen-and-Sulfur Co-Doped Porous Carbon Composites as Efficient Oxygen Reduction Reaction Catalyst
复制标题
嵌入3D分层氮硫共掺杂多孔碳复合材料中的超薄MoS(2)纳米片的合成作为高效氧还原反应催化剂
DOI：
10.1002/celc.202000768
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发表时间：
2020
期刊：
影响因子：
4
通讯作者：
Deng Libo
中科院分区：
文献类型：
--
作者：
Huang Moujie;Chen Huanhui;He Jiao;Chen Junning;Sun Lingna;Li Yongliang;Ren Xiangzhong;Deng Libo
以功能流态丙烯腈端粒为碳源和掺杂剂，sio2为硬模板，采用简便、可扩展的方法制备了二硫化钼复合材料（MoS2@NSC）催化剂。最佳催化剂MoS2@NSC‐2在碱性电解质中表现出有效的氧还原反应（ORR）催化活性，初始电位为0.93 V，半电位为0.82 V。此外，MoS2@NSC‐2有利于四电子还原过程，并表现出优异的耐久性和甲醇耐受性，这可能归因于其独特的多孔结构，可以有效地促进电解质和o2分子的转移。由于在MoS2的晶格中掺杂了N原子，形成了Mo−Nxspecies，进一步增强了ORR的催化活性。我们的工作为大规模设计高效、低成本的ORR催化剂提供了前瞻性的策略。
Catalysts comprising MoS2incorporated into 3D hierarchically N,S co‐doped carbon composites (MoS2@NSC) were prepared through a facile and scalable method by using the functional fluidic acrylonitrile telomer as a carbon source and doping agent, and SiO2as a hard template. The optimal catalyst, MoS2@NSC‐2, showed effective oxygen reduction reaction (ORR) catalytic activity with the initial potential of 0.93 V and half‐potential of 0.82 V in basic electrolyte. In addition, MoS2@NSC‐2 favored a four‐electron reduction process and demonstrated a superior durability and methanol tolerance, which could be ascribed to its unique porous structure that can effectively facilitate the transfer of electrolyte and O2molecules. The Mo−Nxspecies are formed due to the doping of N atoms into the crystal lattice of MoS2, which can further enhance the ORR catalytic activity. Our work affords a forward‐looking strategy for designing efficient and low‐cost ORR catalysts on a large scale.