Electrochemical surface activation of commercial tungsten carbide for enhanced electrocatalytic hydrogen evolution and methanol oxidation reactions

Yousaf, Ammar Bin; Kveton, Filip; Blšáková, Anna; Popelka, Anton; Tkáč, Ján; Kasák, Peter

doi:10.1016/j.jelechem.2022.116525

Cited by 3 publications

(2 citation statements)

References 51 publications

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“…The obtained electrocatalysts exhibited the MOR current density of 107.1 μA at 0.2 V SCE , and a high I f /I b ratio of 1.88. Similarly, Yousaf et al [133] conducted an activation of the WC surface via an electrochemical oxygen reduction reaction that exhibited surface coupling with oxygen to remove the surface carbon and graphitic carbon. The authors proposed that surface carbon removal formed abundant active sites for the MOR, while the removal of graphitic carbon promoted the interaction of carbidic carbon features in WC.…”

Section: Non-noble Metal-based Catalystsmentioning

confidence: 99%

Milestones of Electrocatalyst Development for Direct Alcohol Fuel Cells

Nguyen

Pham

Huynh³

et al. 2023

Advanced Sustainable Systems

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With increasing energy demands and environmental issues, renewable energy‐related conversion systems have gained significant attention as a potential substitute for traditional fossil fuel‐based energy technologies. First introduced by S.W.Grove in 1838, fuel cells have been extensively developed into many different types, and direct alcohol fuel cells (DAFCs) are of interest as a potential power source because of their large power density, quick start, simplicity, and nearly zero emission. However, the high cost and poor catalytic efficiency of current catalysts are primary barriers to commercializing DAFCs. Designing advanced nanocatalysts for both anode and cathode electrodes is of crucial importance for practical DAFC development; however, a brief evaluation of current progress in electrocatalyst development for the alcohol oxidation reaction (AOR) and oxygen reduction reaction (ORR) is still very little. Herein, recent advances in fuel cell catalysts, mainly focusing on several most active areas (i.e., Pt‐ and Pt‐free‐based catalysts, metal‐free carbon, carbon‐based nonprecious metal composites) are concisely summarized. Also, challenges and prospects for DAFCs are highlighted to supply a comprehensive view for further designing high‐performance DAFC catalysts.

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Section: Non-noble Metal-based Catalystsmentioning

confidence: 99%

Milestones of Electrocatalyst Development for Direct Alcohol Fuel Cells

Nguyen

Pham

Huynh³

et al. 2023

Advanced Sustainable Systems

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“…Even though, (TMC) are sharing the same electrical structure as platinum, to be active for the reactions [8]. The majority of research on carbide catalysts is motivated by Levy and Boudart's significant work [9]. Who hypothesized that out of the eight group metals, except for Cu and Au, Pt, Ir, and Au can catalyze the isomerization of 2,2dimethypropane to 2-methylbutane.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Metal Carbide Zeolite Composite Catalyst

Ahmed,

Jarulah,

Altabakh

et al. 2023

Journal of Petroleum Research and Studies

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The object of present work is to synthesize metal carbide zeolite composite catalysts and discusses their characteristics. Metal carbide with zeolite composite was prepared in the present research. Molybdenum carbide was used as a metal carbide which was prepared by solid-state method with Ammonium molybdate tetrahydrate and commercial activated carbon as raw materials. Ion exchanged method was used to add platinum to the HY zeolite. Modified Y zeolite was prepared by using ion exchanged method by mixing the HY zeolite with Cerium nitrate. After prepared Mo2C, PtHY zeolite, and CeY a formation process take place in order to form two catalysts the first one is Mo2C/PtHY-Zeolite, while the second one is Mo2C/CePtY zeolite. Tests such as X-Ray Diffraction, Brunauer-Emmett-Teller (BET) surface area analysis, Fourier transform infrared spectroscopy (FTIR), and Thermal Gravimetric Analysis (TGA) were performed on both catalysts and the results were as follows for the molybdenum carbide the surface area was 1072 m2/g, with a pore volume of 0.541 m3, the TGA indicated that 19.58 wt% of the substance was lost, finally, the average particle size is 18.65 nm. For the Mo2C/PtHY-Zeolite catalyst, the BET surface area was 724.55 m2/g, then the Thermal Gravimetric Analysis resulted in 10% of the catalyst being lost, and lastly, the average crystal size was 33.45nm. Moreover, for Mo2C/CePtY catalyst, the BET surface area was 734.55 m2/g, then the Thermal Gravimetric Analysis resulted in 19% of the catalyst being lost, and the average crystal size was 40.43nm.

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