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Simple preparation of Pt-Ni bimetallic catalysts and application to efficient oxidation reactions in direct lignin fuel cells

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  • Lu, Quanxiong
  • Song, Xianliang

Abstract

Direct lignin fuel cells (DLFC) have recently attracted much attention. However, there are few reports on preparing anodic catalytic layer for DLFC. Thereby, we loaded a small amount of platinum carbon (Pt/C) catalyst on the surface of nickel (Ni) foam by a simple roller pressing method, thus realizing the preparation of Pt-Ni/C bimetallic catalysts. The results proved the successful loading of the Pt/C catalyst onto nickel foam, and the catalyst particle size has an average size of 2.76 nm. The Pt-Ni/C catalysts not only have good oxygen evolution reaction (OER) activity (154 mV overpotential@10 mA/cm2 and tafel-slope of 44 mV/dec) but also have good lignin oxidation reaction (LOR) activity with a low overpotential of 247 mV at 10 mA/cm2. Pt-Ni/C catalysts were applied to DLFC at room temperature, showing an open-circuit voltage (OCV) of 0.84 V and a maximum power density of 0.62 mW/cm2. The optimum Pt/C loading was found to be 0.5 mg/cm2. The modified DLFC is comparable to glucose fuel cells' power generation performance and shows better application prospects.

Suggested Citation

  • Lu, Quanxiong & Song, Xianliang, 2026. "Simple preparation of Pt-Ni bimetallic catalysts and application to efficient oxidation reactions in direct lignin fuel cells," Renewable Energy, Elsevier, vol. 266(C).
    • Handle: RePEc:eee:renene:v:266:y:2026:i:c:s0960148126005628
    DOI: 10.1016/j.renene.2026.125737
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