还原温度对石墨烯负载Pd颗粒的结构与电催化性能的影响

doi:10.11896/cldb.18110180

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Abstract Pd catalyst exhibits exceptional electrocatalytic performance in formic acid oxidation, and suitable supports contribute to the stability and dispersion of Pd particles, which enables Pd particles to give full play of the catalytic performance. Accordingly, we synthesized reduced graphene oxide supported Pd nanoparticles (Pd/RGO) as electrocatalysts for direct formic acid fuel cell by chemical reduction in three different reduction temperatures (0 ℃, 25 ℃ and 50 ℃) with sodium borohydride as reducer. XRD, Raman, XPS, TGA, TEM and BET were employed to characterize the surface morphology and structure of Pd/RGO samples. The electrocatalytic properties of the Pd/RGO electrocatalysts for formic acid oxidation were measured by cyclic voltammetry and chronoamperometry. Emphasis was put on analyzing the impact of reduction temperature on the structure and electrocatalytic performance of the Pd/RGO electrocatalysts. The results indicate that Pd/RGO catalysts prepared under the reduction temperature of 0 ℃ show the largest specific surface area (261 m²·g^-1), with well dispersed Pd nanoparticles and the smallest Pd particle size of 4.16 nm on average; meanwhile this Pd/RGO presents the largest electrochemically active surface area (3.02 cm²) and the highest peak current density (1 820 mA·mg^-1 Pd) towards formic acid electrooxidation.

Key words： graphene palladium electrocatalysis direct formic acid fuel cell chemical reduction

Published: 16 September 2019

CLC number:

TB321

Fund:This work was financially supported by the National Key R & D Plan of China (2017YFB0310905), the National Natural Science Foundation of China (51172083), the Natural Science Foundation of Hunan Province (2017JJ2027).

About author:: Huiquan Wangentered Hunan University to pursue his master’s degree in September 2016. His main research interests are the preparation of Pd nanoparticles supported on graphene and the study of electrocatalytic oxidation performance forward formic acid.
Hui Chenreceived her Ph.D. from Hunan University in 2011. She has been working at Hunan University since 2002. She is currently an associate professor and master tutor at the College of Materials Science and Engineering in Hunan University. Her current research interests lie in basic theory research and application technology development of carbon graphite materials. She has published more than 30 papers in domestic and fo-reign journals and obtained 2 Chinese invention patents.

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	WANG Huiquan
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	WANG Hou
	WU Jing
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Cite this article:

WANG Huiquan,CHEN Hui,WANG Hou, et al. Impact of Reduction Temperature on the Structure and Electrocatalytic Properties of Graphene Supported Pd Nanoparticles[J]. Materials Reports, 2019, 33(22): 3695-3700.

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http://www.mater-rep.com/EN/10.11896/cldb.18110180 OR http://www.mater-rep.com/EN/Y2019/V33/I22/3695

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