4.8 Article

Conductivity-tailored PtNi/MoS2 3D nanoflower catalyst via Sc doping as a hybrid anode for a variety of hydrocarbon fuels in proton exchange membrane fuel cells

Journal

APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 267, Issue -, Pages -

Publisher

ELSEVIER
DOI: 10.1016/j.apcatb.2020.118724

Keywords

Hybrid catalyst; Ethanol; Methane; Hydrogen; Biogas

Funding

  1. International Collaborative Energy Technology R&D Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP)
  2. Ministry of Trade, Industry & Energy, Republic of Korea [20158520000210]
  3. Korea Evaluation Institute of Industrial Technology (KEIT) [20158520000210] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)

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A novel and unique PtSc0.5Ni/MoS2@graphene catalyst possessing hybrid characteristics is prepared. Initially, three-dimensional nanoflower-like structures of MoS2 are deposited onto graphene sheets, and then PtScNi nanoparticles are grafted onto the MoS2@graphene support. For optimization, catalysts with different doping ratios (x = 0.2, 0.5, and 1.0) of Sc are prepared and examined. The electrochemical performances of PtNi/ MoS2@graphene, Pt@graphene, and commercial Pt/C catalysts are further evaluated for comparison. A single cell with the PtSc0.5Ni/MoS2@graphene catalyst exhibits a maximum power density of 51.70 mW cm(-2) at 50 degrees C in ethanol fuel, which is higher than previously reported values. The cell with commercial Pt/C catalyst, in contrast, displays a power density similar to 3.7 times lower. Furthermore, the PtSc0.5Ni/MoS2 @graphene catalyzed single cell delivers promising power densities and stabilities in methane and synthetic biogas fuel containing CH4, CO2, and H2S.

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