| 水热合成二硫化钨/石墨烯复合材料及其氧还原性能 |
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| 引用本文： | 陈亚玲,宋力,郭虎,薛海荣,王涛,何平,何建平.水热合成二硫化钨/石墨烯复合材料及其氧还原性能[J].无机化学学报,2016,32(4):633-640. |
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| 作者姓名： | 陈亚玲 宋力 郭虎 薛海荣 王涛 何平 何建平 |
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| 作者单位： | 南京航空航天大学材料科学与技术学院, 江苏省能量转换材料与技术重点实验室, 南京 210016,南京航空航天大学材料科学与技术学院, 江苏省能量转换材料与技术重点实验室, 南京 210016,南京航空航天大学材料科学与技术学院, 江苏省能量转换材料与技术重点实验室, 南京 210016,南京航空航天大学材料科学与技术学院, 江苏省能量转换材料与技术重点实验室, 南京 210016,南京航空航天大学材料科学与技术学院, 江苏省能量转换材料与技术重点实验室, 南京 210016,南京大学现代工程与应用科学学院储能材料与技术中心, 固体微结构国家实验室, 南京 210093,南京航空航天大学材料科学与技术学院, 江苏省能量转换材料与技术重点实验室, 南京 210016 |
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| 基金项目： | 国家自然科学基金(No.51372115)和江苏高校优势学科建设工程(PAPD)资助项目。 |
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| 摘 要： | 以六氯化钨、硫代乙酰胺、氧化石墨烯为原料,采用一步水热法合成了二维的二硫化钨/石墨烯(WS_2/RGO)复合材料。水热合成的WS_2/RGO具有薄层的二维结构,且由于石墨烯的存在,WS_2以较少的层数形成薄片状生长在石墨烯的表面。尝试将这种非Pt类材料用于电催化氧化原反应,测试结果表明,WS_2在碱性条件下氧还原活性非常低,但是复合RGO形成WS_2/RGO复合材料后,电催化氧化原性能有了极大的提高,其起始电位为-0.17 V(vs SCE),转移电子数为3.7,极限电流密度为2.5 m A·cm-2,同时其具有较好的抗甲醇性能和循环稳定性。这是因为WS_2/RGO复合材料的二维结构具有更高的电子传输速率,同时硫化钨和石墨烯可以发挥协同催化作用。这种新型的二硫化钨/石墨烯(WS_2/RGO)复合材料作为非贵金属催化剂表现出良好的氧还原性能,在燃料电池上具有较好的应用前景。
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| 关 键 词： | 水热法 二硫化钨 还原氧化石墨烯 燃料电池 氧还原反应 |
| 收稿时间： | 2015/12/7 0:00:00 |
| 修稿时间： | 2016/1/22 0:00:00 |
Hydrothermal Synthesis and ORR Performance of Tungsten Disulfide/Reduced Graphene Oxide Composite |
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| CHEN Ya-Ling,SONG Li,GUO Hu,XUE Hai-Rong,WANG Tao,HE Ping and HE Jian-Ping.Hydrothermal Synthesis and ORR Performance of Tungsten Disulfide/Reduced Graphene Oxide Composite[J].Chinese Journal of Inorganic Chemistry,2016,32(4):633-640. |
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| Authors: | CHEN Ya-Ling SONG Li GUO Hu XUE Hai-Rong WANG Tao HE Ping and HE Jian-Ping |
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| Affiliation: | Jiangsu Key Laboratory of Materials and Technology for Energy Conversion, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China,Jiangsu Key Laboratory of Materials and Technology for Energy Conversion, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China,Jiangsu Key Laboratory of Materials and Technology for Energy Conversion, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China,Jiangsu Key Laboratory of Materials and Technology for Energy Conversion, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China,Jiangsu Key Laboratory of Materials and Technology for Energy Conversion, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China,Center of Energy Storage Materials & Technology, College of Engineering and Applied Sciences, National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China and Jiangsu Key Laboratory of Materials and Technology for Energy Conversion, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China |
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| Abstract: | Two-dimensional tungsten disulfide/reduced graphene oxide(WS2/RGO) composite was synthesized by one-step hydrothermal method using tungsten hexachlorid, thioacetamide and graphene oxide(GO) as precursors. Due to the presence of graphene, WS2 with few layers is uniformly grown on the surface of RGO.We attempted to employ this non-Pt material as an electrocatalyst for oxygen reduction reaction(ORR).Test results indicate that the ORR activity of WS2 in alkaline electrolyte is actually very low. However, after the formation of WS2/RGO composite, the electrocatalytic performance has been greatly improved.The composite shows an initial potential of-0.17 V(vs SCE) and the limiting current density is 2.5 mA·cm-2.Besides, the number of transfer electrons in ORR is 3.7, which is nearly comparable to that of commercial Pt/C(20%).Moreover, it shows remarkable durability and better resistance toward methanol crossover in ORR.It is thought that WS2/RGO has better electronic conductivity and WS2 can play a synergistic catalytic effect with RGO.As a result, the novel WS2/RGO material as a non noble metal catalyst in fuel cells is considerably promising. |
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| Keywords: | hydrothermal method tungsten disulfide reduced graphene oxide fuel cell oxygen reduction reaction |
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