Synthesis of platinum/multi-wall carbon nanotube catalysts
Synthesis of platinum/multi-wall carbon nanotube catalysts
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DOI：
10.1557/jmr.2004.0301
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发表时间：
2004-08
影响因子：
2.7
通讯作者：
P. Mu;Tang Haolin;Mu Shichun;Y. Run-zhang
中科院分区：
文献类型：
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作者：
P. Mu;Tang Haolin;Mu Shichun;Y. Run-zhang
本研究旨在探讨铂/多壁碳纳米管（Pt/MWNT）催化剂的合成及其在燃料电池中应用的可行性。通过预处理对所得到的MWNTs进行纯化和修饰。红外光谱分析表明，预处理后的碳纳米管表面引入了羧基（-COOH）和羰基（-C=O）。这些官能团将充当Pt沉积的锚位点。然后，通过六氯铂酸溶液的还原，在MWNTs表面沉积纳米尺度的Pt颗粒。透射电子显微镜检查表明，Pt颗粒附着在MWNTs的表面。如果未以适当的方式预处理所接收的MWNTs，则Pt颗粒聚集体主要存在于MWNTs的开口端上。偶尔铂渗透到管内的多壁碳纳米管。讨论了预处理条件和还原反应条件与Pt颗粒形貌的关系。热处理后，Pt颗粒重结晶形成Pt/MWNT催化剂。将Pt/MWNT催化剂应用于单电池，测试结果表明，低Pt负载的这些催化剂在质子交换膜燃料电池（PEMFC）中具有良好的应用前景。
The purpose of this research is to investigate the feasibility of the synthesis of platinum/multi-wall carbon nanotube (Pt/MWNT) catalysts and such catalysts’ application in fuel cells. The as-received MWNTs were purified and decorated by pretreatment. Infrared-spectrum indicates the carboxylic (-COOH) and carbonyl (-C=O) groups were introduced on the surface of the MWNTs after pretreatment. These functional groups will act as anchor sites for the Pt deposition. Then the Pt particles in nano scale were deposited on the surface of MWNTs by reduction of a solution of hexachloroplatinic acid. Transmission electron microscopy examination reveals that Pt particles are attached to the surface of MWNTs. If as-received MWNTs are not pretreated in the proper way, the Pt particle aggregates are mostly found on the open end of MWNTs. Occasionally Pt penetrated inside the tube of MWNTs. The relationship between the Pt particle morphology and the conditions of pretreatment and reduction reaction is discussed. After heat treatment, Pt particles recrystallized to form the Pt/MWNT catalysts. The Pt/MWNT catalysts were applied to a single cell and the test result shows a promising future of these catalysts with low Pt loading when applied in proton exchange membrane fuel cells (PEMFCs).