NiO@rGO负载钯、银纳米粒子用作氧还原催化剂

doi:10.13208/j.electrochem.190125

摘要/Abstract

摘要：

为了促进燃料电池的广泛应用,必须研发一种高效、经济的氧还原（ORR）催化剂材料替代目前使用的昂贵的Pt基催化剂. 本文合成了NiO@rGO、Pd-NiO@rGO和Ag-NiO@rGO三种催化剂材料,并对其ORR催化性能进行了比较研究. 结果表明,三种材料均具有催化ORR的能力,但与NiO@rGO相比,Pd-NiO@rGO和Ag-NiO@rGO展示了更加优异的性能,主要表现在其4电子转移ORR过程、起始电位增加,中间产物的产率降低和稳定性提高. 其中,Pd-NiO@rGO作为ORR催化剂的性能最好.

关键词: 氧还原, 催化剂, 氧化镍, 还原氧化石墨烯, 表面修饰

Abstract:

For pervasive applications of fuel cells, highly efficient and economical materials are required to replace Pt-based catalysts for oxygen reduction reaction (ORR). In this study, the NiO@rGO, Pd-NiO@rGO and Ag-NiO@rGO nanoparticles were synthesized, and their catalytic performances toward ORR were investigated. The results revealed that all the three materials were capable of catalyzing ORR, but both the Pd-NiO@rGO and Ag-NiO@rGO showed the better performances compared with the NiO@rGO in terms of the reaction pathway being 4-electron process, the increases of the onset potential and the intermediate yielding rate, as well as the extended stability. Moreover, the effect of Pd modification was superior to that of Ag.

Key words: oxygen reduction reaction, catalyst, nickel oxide, reduced graphene oxide, surface modification

中图分类号:

O646

姚硕, 黄太仲, RizwanHaider, 房恒义, 于洁玫, 姜占坤, 梁栋, 孙玥, 原鲜霞. NiO@rGO负载钯、银纳米粒子用作氧还原催化剂[J]. 电化学（中英文）, 2020, 26(2): 270-280.

YAO Shuo, HUANG Tai-zhong, HAIDER Rizwan, FANG Heng-yi, YU Jie-mei, JIANG Zhan-kun, LIANG Dong, SUN Yue, YUAN Xian-xia. NiO@rGO Supported Palladium and Silver Nanoparticles as Electrocatalysts for Oxygen Reduction Reaction[J]. Journal of Electrochemistry, 2020, 26(2): 270-280.

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链接本文: https://electrochem.xmu.edu.cn/CN/10.13208/j.electrochem.190125

https://electrochem.xmu.edu.cn/CN/Y2020/V26/I2/270

图/表 6

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Catalyst	b/(V·dec^-1)	α	i₀/(A·cm^-2)	n
Pd-NiO@rGO	0.078	0.0625	8.9×10^-7	3.89
Ag-NiO@rGO	0.220	0.0612	7.1×10^-7	3.71
NiO@rGO	0.105	0.0298	1.5×10^-7	2.36