Preparation and characterization of Pt supported on graphene with enhanced electrocatalytic activity in fuel cell
Preparation and characterization of Pt supported on graphene with enhanced electrocatalytic activity in fuel cell
复制标题
增强燃料电池电催化活性的石墨烯负载Pt的制备及表征
DOI：
10.1016/j.jpowsour.2010.08.051
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发表时间：
2011-02
影响因子：
9.2
通讯作者：
Zou, Zhigang
中科院分区：
文献类型：
--
作者：
Xin, Yuchen;Liu, Jian-guo;Zhou, Yong;Liu, Wenming;Gao, Jian;Xie, Yun;Yin, Ying;Zou, Zhigang
通过使用 NaBH4 同步还原 H2PtCl6 和氧化石墨烯 (GO) 悬浮液，将 Pt 纳米颗粒沉积到石墨烯片上。引入冻干是为了避免传统干燥过程中发生的石墨烯（G）片的不可逆聚集。与炭黑负载的 Pt (Pt/C) 相比，Pt/G 催化剂对甲醇氧化和氧还原反应具有较高的催化活性。 Pt/G催化剂在N2气氛中300℃热处理2h后性能进一步提高，热处理后Pt/G的甲醇氧化峰值电流密度几乎是Pt/C的3.5倍。透射电子显微镜 (TEM) 图像显示 Pt 颗粒均匀分布在石墨烯片上。 X 射线光电子能谱 (XPS) 结果表明，退火过程中 Pt 和石墨烯之间的相互作用增强。这表明石墨烯为提高燃料电池催化剂的电催化活性提供了新途径。
Pt nanoparticles are deposited onto graphene sheets via synchronous reduction of H2PtCl6and graphene oxide (GO) suspension using NaBH4. Lyophilization is introduced to avoid irreversible aggregation of graphene (G) sheets, which happens during conventional drying process. Pt/G catalysts reveal a high catalytic activity for both methanol oxidation and oxygen reduction reaction compared to Pt supported on carbon black (Pt/C). The performance of Pt/G catalysts is further improved after heat treatment in N2atmosphere at 300°C for 2h, and the peak current density of methanol oxidation for Pt/G after heat treatment is almost 3.5 times higher than Pt/C. Transmission electron microscope (TEM) images show that the Pt particles are uniformly distributed on graphene sheets. X-ray photoelectron spectroscopy (XPS) results demonstrate that the interaction between Pt and graphene is enhanced during annealing. It suggests that graphene has provided a new way to improve electrocatalytic activity of catalyst for fuel cell.
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影响因子：
15
作者：
Hsin, Yu Lin;Hwang, Kuo Chu;Yeh, Chuin-Tih
通讯作者：
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影响因子：
9.2
作者：
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影响因子：
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作者：
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通讯作者：
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影响因子：
5.3
作者：
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通讯作者：
Nakamura, J
影响因子：
9.2
作者：
A. Pozio;M. D. Francesco;A. Cemmi;F. Cardellini;L. Giorgi
通讯作者：
A. Pozio;M. D. Francesco;A. Cemmi;F. Cardellini;L. Giorgi