硫掺杂三维多孔石墨烯/无定形碳复合材料的制备及其析氧性能研究  

Preparation of sulfur-doped 3D porous graphene/amorphous carbon composite and its electrocatalytic oxygen evolution performance

作　　者：任壮 王佳斌 张育萌 侯莹[1] 刘培植[1] 章海霞[1] REN Zhuang;WANG Jia-bin;ZHANG Yu-meng;HOU Ying;LIU Pei-zhi;ZHANG Hai-xia(Key Laboratory of Interface Science and Engineering in Advanced Materials of Ministry of Education,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学新材料界面科学与工程教育部重点实验室,山西太原030024

出　　处：《应用化工》2021年第5期1218-1221,共4页Applied Chemical Industry

基　　金：国家自然科学基金(51701137,51703150);山西省面上自然基金(201701D121043);山西省高等学校科技创新项目(2019L0253)。

摘　　要：以氧化石墨烯(GO)、硫脲、蔗糖作为原料,通过水热反应和高温退火制备了S掺杂三维多孔石墨烯和无定形碳交替的类三明治结构材料(SGC)。通过扫描电子显微镜(SEM)、透射电子显微镜(TEM)和X射线粉末衍射仪(XRD)等对样品形貌和结构等进行分析表征,使用CHI 760E电化学工作站对样品进行电催化析氧性能(OER)测试。结果表明,当添加的蔗糖含量达到300 mg时,样品(SGC300)中的活性位点最多,性能达到最高。SGC300样品在电流密度为10 mA/cm^(2)时,所需的过电位仅为470 mV,其塔菲尔斜率也比较小,而且该催化剂在循环2000次后,电位损失为17 mV,显示了较好的催化活性和稳定性。A sandwich like structure material(SGC)was prepared from GO,thiourea and sucrose by hydrothermal reaction and high-temperature annealing.The morphology and structure of the samples were characterized by SEM,TEM and XRD.The electrochemical workstation of CHI760E was used to test the electrocatalytic oxygen evolution(OER)performance of the samples.The results showed that when the added sucrose content reaches 300 mg,the active sites in the sample(SGC300)are the most and the performance is the highest.When the current density is 10 mA/cm^(2),the required overpotential is 470 mV,and the Tafel slope is also relatively small.Moreover,the potential loss of the catalyst is only 17 mV after 2000 cycles,showing a good catalytic activity and stability.

关 键 词：氧化石墨烯 掺杂 碳材料 无金属催化剂 析氧反应 

分 类 号：TQ151.1[化学工程—电化学工业]