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沉积在功能化石墨烯片上的铂纳米颗粒的表征

Characterization of Platinum Nanoparticles Deposited on Functionalized Graphene Sheets.

作者信息

Chiang Yu-Chun, Liang Chia-Chun, Chung Chun-Ping

机构信息

Department of Mechanical Engineering, Yuan Ze University, 135 Yuan-Tung Rd., Chung-Li, Taoyuan 32003, Taiwan.

出版信息

Materials (Basel). 2015 Sep 21;8(9):6484-6497. doi: 10.3390/ma8095318.

DOI:10.3390/ma8095318
PMID:28793577
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5512925/
Abstract

Due to its special electronic and ballistic transport properties, graphene has attracted much interest from researchers. In this study, platinum (Pt) nanoparticles were deposited on oxidized graphene sheets (cG). The graphene sheets were applied to overcome the corrosion problems of carbon black at operating conditions of proton exchange membrane fuel cells. To enhance the interfacial interactions between the graphene sheets and the Pt nanoparticles, the oxygen-containing functional groups were introduced onto the surface of graphene sheets. The results showed the Pt nanoparticles were uniformly dispersed on the surface of graphene sheets with a mean Pt particle size of 2.08 nm. The Pt nanoparticles deposited on graphene sheets exhibited better crystallinity and higher oxygen resistance. The metal Pt was the predominant Pt chemical state on Pt/cG (60.4%). The results from the cyclic voltammetry analysis showed the value of the electrochemical surface area (ECSA) was 88 m²/g (Pt/cG), much higher than that of Pt/C (46 m²/g). The long-term test illustrated the degradation in ECSA exhibited the order of Pt/C (33%) > Pt/cG (7%). The values of the utilization efficiency were calculated to be 64% for Pt/cG and 32% for Pt/C.

摘要

由于其特殊的电子和弹道传输特性，石墨烯引起了研究人员的广泛关注。在本研究中，铂（Pt）纳米颗粒沉积在氧化石墨烯片（cG）上。石墨烯片被用于解决质子交换膜燃料电池运行条件下炭黑的腐蚀问题。为了增强石墨烯片与Pt纳米颗粒之间的界面相互作用，在石墨烯片表面引入了含氧官能团。结果表明，Pt纳米颗粒均匀地分散在石墨烯片表面，平均Pt粒径为2.08 nm。沉积在石墨烯片上的Pt纳米颗粒表现出更好的结晶度和更高的抗氧性。金属Pt是Pt/cG上主要的Pt化学状态（60.4%）。循环伏安分析结果表明，电化学表面积（ECSA）值为88 m²/g（Pt/cG），远高于Pt/C（46 m²/g）。长期测试表明，ECSA的降解程度为Pt/C（33%）>Pt/cG（7%）。计算得出Pt/cG的利用效率值为64%，Pt/C为32%。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9077/5512925/2daf3f699835/materials-08-05318-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9077/5512925/8fcc2b42b153/materials-08-05318-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9077/5512925/a379d51cebfa/materials-08-05318-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9077/5512925/44ebfaa7ef52/materials-08-05318-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9077/5512925/11e8b4991d30/materials-08-05318-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9077/5512925/d7f5943cd001/materials-08-05318-g005a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9077/5512925/b55abb96b13f/materials-08-05318-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9077/5512925/2daf3f699835/materials-08-05318-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9077/5512925/8fcc2b42b153/materials-08-05318-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9077/5512925/a379d51cebfa/materials-08-05318-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9077/5512925/44ebfaa7ef52/materials-08-05318-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9077/5512925/11e8b4991d30/materials-08-05318-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9077/5512925/d7f5943cd001/materials-08-05318-g005a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9077/5512925/b55abb96b13f/materials-08-05318-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9077/5512925/2daf3f699835/materials-08-05318-g007.jpg

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本文引用的文献

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