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-在减少的石墨烯氧化物作为高活性和稳定的演变和甲醇氧化反应的双功能电催化剂

Yingliang Feng¹, Lihua Zhu¹, An Pei¹

¹Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, College of Chemistry and Chemical engineering, Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, Jiang Xi, China. zhulihua@jxust.edu.cn.

|October 19, 2023

概括

研究人员开发了新的-纳米颗粒在减少的氧化石墨烯 (PtPd/rGO) 作为双功能电催化剂. 这种PtPd/rGO材料通过演变反应 (HER) 和甲醇氧化反应 (MOR) 在性条件下有效地产生.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
可再生能源是可再生能源的来源.

背景情况:

由于化石燃料的耗尽,对替代能源的需求不断增长.
能提供了一种绿色,无污染的替代能源.
甲醇氧化反应 (MOR) 与演变反应 (HER) 结合,可以有效地产生,取代水分裂中的氧演变反应 (OER).

研究的目的:

在减少的氧化石墨烯 (PtPd/rGO) 上合成-纳米粒子作为双功能电催化剂.
为了评估PtPd/rGO在性介质中的HER和MOR的电催化性能.
调查PtPd/rGO在合HER和MOR中的潜力,以提高的生产.

主要方法:

使用简单的液相还原方法,将 (Pt) 和 (Pd) 双金属纳米粒子逐步加载到减少的氧化石墨烯 (rGO) 上.
合成的PtPd/rGO电催化剂的表征.
对PtPd/rGO-2进行HER和MOR的电化学测试,包括超电位,Tafel斜率和质量活动测量.

主要成果:

对于HER,PtPd/rGO-2表现出最低的超电位 (87.16 mV在100 mA cm−2) 和最小的Tafel斜率 (18.9 mV dec−1).
对于MOR,PtPd/rGO-2的质量活性异常高 (10.75A mg-1PtPd),显著超过商业Pt/C和Pd/C.
使用PtPd/rGO-2的合MOR HER反应需要比OER HER在没有甲醇的情况下进行整体水分裂时所需的电位少0.935V.

结论:

合成的PtPd/rGO-2在性条件下对HER和MOR都表现出卓越的双功能电催化活性.
Pt,Pd和rGO之间的协同相互作用提高了催化性能,归因于最佳负载和暴露的催化位点.
该战略为开发新型双功能电催化剂提供了一条道路,用于高效的生产和替代能源应用.

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