Fernanda Rechotnek, Manuel E.G. Winkler, Lucas U.R. Chiavelli, Oscar O. Santos Júnior, Guilherme Miranda Pereira, Rafael Silva
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引用次数: 0
摘要
本研究介绍了酸处理对石墨箔(GF)电极的影响,以及在 GF 上通过电沉积获得具有显著亲水性的电催化剂的直接方法。在经过(Pd-Co-EGF)和未经过(Pd-Co-GF)酸处理的石墨箔上电沉积了钯-钴纳米粒子。结果表明,酸处理后 GF 的润湿性得到提高,这是由于其表面氧化生成了氧官能团。这些基团有助于增强双金属 Pd-Co 纳米粒子的化学吸附性和甘油的电氧化性。在这里,Pd-Co-EGF 催化剂用于甘油电氧化的电流密度峰值达到了 3414 mA mg-1,超过了 1961 mA mg-1 的 Pd-Co-GF 催化剂和 359 mA mg-1 的商用 Pd/C 催化剂,为液体燃料电池和混合水电解的阳极生产提供了重要进展。
Super-hydrophilic and Expanded Graphite Foil as Support for Pd-Co electrodeposition: An Effective Catalyst for Glycerol Electrooxidation and HWE Application
This work describes the impact of acid treatment on graphite foil (GF) electrodes, as well as a straightforward method to obtain electrocatalyst by electrodeposition on GF with a remarkably hydrophilic property. Pd-Co nanoparticles were electrodeposited on GF with (Pd-Co-EGF) and without (Pd-Co-GF) acid treatment. The results exhibit elevated wettability of GF after acid treatment due to oxidation by generating oxygen functional groups on its surface. These groups contribute to both the enhancement of the chemical adsorption of bimetallic Pd-Co nanoparticles and the electrooxidation of glycerol. Herein, the current density peak of the Pd-Co-EGF catalyst for electrooxidation of glycerol reaches 3414 mA mg-1, surpassing that of the Pd-Co-GF catalyst with 1961 mA mg-1 and commercial Pd/C with 359 mA mg-1, providing an essential advance toward anode production for liquid fuel cells and hybrid water electrolysis.
期刊介绍:
Electrochimica Acta is an international journal. It is intended for the publication of both original work and reviews in the field of electrochemistry. Electrochemistry should be interpreted to mean any of the research fields covered by the Divisions of the International Society of Electrochemistry listed below, as well as emerging scientific domains covered by ISE New Topics Committee.