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

材料导报

2019, Vol. 33

Issue (22): 3695-3700 https://doi.org/10.11896/cldb.18110180

无机非金属及其复合材料

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

王会权¹,陈惠^1,2,,王后¹,巫静¹,刘洪波^1,2

1 湖南大学材料科学与工程学院,长沙 410082
2 湖南省先进炭材料研究所,长沙 410082

Impact of Reduction Temperature on the Structure and Electrocatalytic Properties of Graphene Supported Pd Nanoparticles

WANG Huiquan¹, CHEN Hui^1,2, WANG Hou¹, WU Jing¹, LIU Hongbo^1,2

1 College of Material Science and Engineering, Hunan University, Changsha 410082
2 Advanced Carbon Materials Research Institute in Hunan Province, Changsha 410082

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摘要 Pd催化剂对甲酸氧化反应具有出色的电催化性能,适宜的载体有助于改善Pd颗粒的稳定性和分散性,从而使其催化性能得以有效发挥。鉴于此,以硼氢化钠为还原剂,采用化学还原法在不同还原温度(0 ℃、25 ℃和50 ℃)下制备了石墨烯负载Pd颗粒催化剂(Pd/RGO)。采用XRD、Raman、XPS、TGA、TEM和BET等测试方法对该催化剂材料的微观形貌和结构进行了表征,利用循环伏安法和计时电流法测试了催化剂对甲酸氧化反应的电催化性能,着重分析了制备过程中还原温度对催化剂材料结构与电催化性能的影响。结果表明,当还原温度为0 ℃时,Pd/RGO的比表面积最大,达到261 m²·g^-1,Pd颗粒粒径最小,约为4.16 nm;并且Pd/RGO具有最大的电化学活性面积(3.02 cm²),其氧化峰电流密度最高可达1 820 mA·mg^-1 Pd。

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	王会权
	陈惠
	王后
	巫静
	刘洪波

关键词: 石墨烯钯电催化直接甲酸燃料电池化学还原

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

出版日期: 2019-11-25 发布日期: 2019-09-16

ZTFLH:

TB321

基金资助: 国家重点研发计划(2017YFB0310905);国家自然科学基金(51172083);湖南省自然科学基金(2017JJ2027)

作者简介: 王会权,于2016年9月进入湖南大学攻读硕士学位,主要研究方向为石墨烯负载Pd催化剂材料的制备及甲酸电催化氧化性能研究。
陈惠,湖南大学材料科学与工程学院副教授、硕士生导师。2002年到湖南大学工作至今,并于2011年获得湖南大学博士学位,主要从事炭石墨材料的基础理论研究与应用技术开发。在国内外期刊上发表论文30余篇,获得中国发明专利2项。

引用本文:

王会权, 陈惠, 王后, 巫静, 刘洪波. 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[J]. 材料导报, 2019, 33(22): 3695-3700.
WANG Huiquan, CHEN Hui, WANG Hou, WU Jing, LIU Hongbo. Impact of Reduction Temperature on the Structure and Electrocatalytic Properties of Graphene Supported Pd Nanoparticles. Materials Reports, 2019, 33(22): 3695-3700.

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

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