期刊
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
卷 152, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.mssp.2022.107116
关键词
Fuel cells; ORR; Palladium; Ketjen black carbon; Electrocatalyst
类别
资金
- Materials/Parts Technology Devel-opment Program
- Ministry of Trade, Industry & Energy (MOTIE, Korea)
- [20017575]
This article introduces a simple and cost-effective method for synthesizing Pd-Ni(OH)2 nanocatalysts, which exhibit high performance, excellent durability, and methanol resistance in fuel cells, making them a potential alternative to Pt/C.
Recently, the oxygen reduction reaction (ORR) in fuel cells has been considered as an environmental-friendly and efficient technology in energy conversion systems and the field of energy storage. Herein, we propose a facile and cost-effective method for synthesizing Pd-Ni(OH)2 nanocatalysts on Ketjen black carbon as an alternative to commercial Pt/C catalysts. First, the Pd-Ni(OH)2/C nanocatalyst prepare using a sonochemical and solvothermal method. Then, the Pd-Ni(OH)2/C nanocatalyst analysis using transmission electron microscopy, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and inductively coupled plasma optical emission spectrometry (ICP-OES). Pd-Ni(OH)2 nanoparticles with sizes of approximately 5 nm well disperse on the Ketjen black carbon. XRD use to clarify face-centered cubic Pd and amorphous Ni(OH)2. The valence states of Pd and Ni(OH)2 confirm using XPS. The amounts of Pd and Ni in the nanocatalyst are 12.14 and 2.21 wt%, respectively, from ICP. Pd-Ni (OH)2/C exhibits high performance in linear sweep voltammetry for the ORR. In addition, long-term stability and methanol tolerance confirm via chronoamperometry experiments in an alkaline solution. Pd-Ni(OH)2/C exhibits better durability than that of commercial Pt/C. The high current density, durability, and methanol resistance of Pd-Ni(OH)2/C present a potential alternative to Pt/C in proton exchange membrane fuel cells and direct methanol fuel cells through a facile and cost-effective synthesis method.
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