Simple preparation of tungsten carbide supported on carbon for use as a catalyst support in a methanol electro-oxidation

Transition Metal Carbides and Nitrides as Electrode Materials for Low Temperature Fuel Cells

“…This group also reported that specific activities (above 200 mA/cm 2 at 0.75 V vs Ag/AgCl) of 3.5 wt% and 7.5 wt% loaded tungsten carbide (WC) were higher than those of Pt/W 2 C and commercial catalyst (20 wt% PtRu/C, E-Tek) for methanol oxidation as shown in Figure 8, [84]. Also, 20 wt% Pt/W 2 C electrocatalysts showed the higher mass current density (mA/mg Pt ) than 20 wt% Pt/C at the same potential in 0.5 M H 2 SO 4 electrolyte, SCE reference electrode [90]. Recently, many new reports for methanol oxidation over tungsten carbides have been published.…”

Core-shell structured tungsten–tungsten carbide as a Pt catalyst support and its activity for methanol electrooxidation

“…Comparison of the activity for MOR exhibited by Pt nanoparticles supported on WC nanoparticles and on high area carbon also gave inconsistent results. Results by Joo et al [11] show no significant difference between the activity of Pt nanoparticles supported on WC nanoparticles and on high area carbon. A similar conclusion can be drawn from the work of Ko et al [13] who investigated nanocrystalline Pt and Pt-WC phases.…”

Simple preparation of tungsten supported carbon nanoreactors for specific applications: Adsorption, catalysis and electrochemical activity

“…The prepared CTC-25 and CTC-170 showed additional diffraction peaks for tungsten subcarbide (W 2 C) at 2Â values (34. (2 0 1), respectively [17,22,23]. The intensity of the W 2 C/WC peaks suggested that both the MCNRs have a well developed crystalline structure of tungsten carbide incorporated in the carbon cage.…”

“…CTCE-25 and CTCE-170 demonstrated a partial reduction peak between 0.2 and 0.4 V and partial oxidation peak between 0.4 and 0.6 V. Interestingly, at the same scan rate, the charge stored at the CTCE-25 was higher than CTCE-170, which (CTCE-25) represents better capacitive behavior and electrochemical performance. CTCE-25 is a better catalyst for methanol electrocatalysis than CTCE-170 [1,17]. Here, the formation of electrode plays crucial role for its electro-catalytic performance.…”

“…Consequently, among the many techniques available for engineering metal carbon nanoreactors (MCNRs), the modern template method and metal doping approach can uniquely produce a wide range of different sized porous structures and well-defined morphologies with metal functionalities [13][14][15] activity and selectively of nanocomposites. Transition-metal composites (tungsten and molybdenum) have shown great significance over the past years because of their potential in applications as a sensor, photochemical device, fuel cell for power generation, adsorbent, heterogeneous catalyst or its host [16][17][18]. Therefore, the characteristic properties of transition-metal composites have been found to be similar to those of precious metals, such as platinum [19].…”