应用于氧还原反应的石墨烯-无定形碳核壳结构复合材料载铂催化剂

采用氯化法制备石墨烯-无定型碳复合材料（GNS@a-C）,并用作质子交换膜燃料电池（PEMFC）氧还原反应Pt催化剂的载体.结果显示,所制Pt/GNS@a-C催化剂与传统商业催化剂Pt/C相比,有较好的活性和较高的稳定性：质量活性（0.121 A/mg）几乎是Pt/C（0.064 A/mg）的两倍.更重要的是,该新型催化剂加速4000圈后其电化学活性面积保留了最初的51%,与Pt/C的33%相比,前者有更好的电化学稳定性,显示它在PEMFC中将具有较好的应用潜力....

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Published in催化学报 Vol. 36; no. 4; pp. 490 - 495
Main Author 吴惠 彭焘 寇宗魁 张建 程坤 何大平 潘牧 木士春
Format Journal Article
LanguageChinese
Published 武汉理工大学材料复合新技术国家重点实验室,湖北武汉,430070 2015
Subjects
低温燃料电池
核壳结构
氧还原反应
载体
核壳结构
氧还原反应
Support
Oxygen reduction reaction
载体
Low-temperature fuel cell
Core-shell structure
低温燃料电池
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Summary:采用氯化法制备石墨烯-无定型碳复合材料（GNS@a-C）,并用作质子交换膜燃料电池（PEMFC）氧还原反应Pt催化剂的载体.结果显示,所制Pt/GNS@a-C催化剂与传统商业催化剂Pt/C相比,有较好的活性和较高的稳定性：质量活性（0.121 A/mg）几乎是Pt/C（0.064 A/mg）的两倍.更重要的是,该新型催化剂加速4000圈后其电化学活性面积保留了最初的51%,与Pt/C的33%相比,前者有更好的电化学稳定性,显示它在PEMFC中将具有较好的应用潜力.
Bibliography:Low-temperature fuel cell; Support; Core-shell structure; Oxygen reduction reaction
A core-shell graphene nanosheets（GNS） and amorphous carbon composite（GNS@a-C） was pre-pared by a chlorination method and used as a highly efficient catalyst support for oxygen reduction reaction. Herein, GNS as a shell, with excellent conductivity, high surface area, and corrosion re-sistance, served as a protecting coating to alleviate the degradation of amorphous carbon core. Platinum nanoparticles were homogeneously deposited on the carbon support（Pt/GNS@a-C） and showed a good catalytic activity and a higher electrochemical stability when compared with a commercial Pt/C catalyst. The mass activity of Pt/GNS@a-C catalyst was 0.121 A/mg, which was almost twice as high as that of Pt/C（0.064 A/mg）. Moreover, Pt/GNS@a-C retained 51% of its initial electrochemical specific area after 4000 operating cycles when compared with Pt/C（33%）. Thus, the prepared catalyst featured excellent electrochemical stability, showing promise for app
ISSN:0253-9837
1872-2067
DOI:10.1016/S1872-2067(14)60211-4