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In this paper, we describe a facile new synthetic method for making highly dispersed molybdenum disulfide nanoparticles (~ 3 nm) on Ketjenblack carbon (MoS2/KC) via particle incorporation and sequential sulfidation. The MoS2/KC nanocatalyst obtained showed a good onset potential value (0.83 V), high durability, and excellent methanol tolerance for...
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Citations
... However, the high cost, scarcity, durability, and low methanol tolerance limit the commercialization of Pt-based catalysts [10][11][12][13][14][15]. Therefore, considerable research has recently been conducted to create electrocatalysts using relatively inexpensive metals with high performance, long-term durability, and good methanol resistance [6,[16][17][18][19][20][21][22][23][24][25][26]. ...
... • , 46.60 • , 68.10 • , and 82.39 • , respectively. Using the Debye-Scherrer formula, the estimated particle size was calculated to be approximately 5 nm, according to the XRD pattern [21,23,61]. To confirm the Pd peak, the distance between lines was calculated to be approximately 0.223 nm, which represents the (111) lattice plane of the face centered cubic structure of Pd. ...
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.
