Transition metal and nitrogen-doped mesoporous carbons as cathode catalysts for anion-exchange membrane fuel cells

Polypyrrole and Polythiophene Modified Carbon Nanotube‐Based Cathode Catalysts for Anion Exchange Membrane Fuel Cell

“…For comparison, an AEMFC test was also performed with commercial Pt/C as a cathode catalyst. For Pt/C catalyst layers, the cathode catalyst ink was prepared from 5.4 mg of Pt/C (46 wt % Pt, TANAKA Kikinzoku Kogyo K.K., Japan), 579 μL of methanol, 169 μL of Milli‐Q water and 56 μL of 3 wt % ionomer solution [60] . After drying, a catalyst loading of 0.4 mg Pt cm −2 was calculated for the cathode.…”

“…Before use, the electrodes and the AEM were soaked in 3 M KOH solution for one and four days, respectively. The 3 M KOH solution for AEM was changed after every 24 h. [60] The AEM and electrodes, together with silicone gaskets, were pressed together, using a torque of 9 Nm, in a 5 cm 2 cell (Fuel Cell Technologies Inc., USA). A Greenlight Fuel Cell Test Station (G50 Fuel Cell System, Hydrogenics, Canada) was employed for the single-cell AEMFC experiments.…”

“…For Pt/C catalyst layers, the cathode catalyst ink was prepared from 5.4 mg of Pt/C (46 wt % Pt, TANAKA Kikinzoku Kogyo K.K., Japan), 579 μL of methanol, 169 μL of Milli-Q water and 56 μL of 3 wt % ionomer solution. [60] After drying, a catalyst loading of 0.4 mg Pt cm À 2 was calculated for the cathode. The relative humidity of H 2 and O 2 gases during the testing with Pt/ C was 60 % RH.…”

Precise and scalable fabrication of metal pair-site catalysts enabled by intramolecular integrated donor atoms

“…8,9 In the past decade, non-noble metal single-atom catalysts (SACs) with typical metal-nitrogen coordinate sites (M-N-C) have gained great attention due to their outstanding catalytic activity. [10][11][12][13] Recent studies reveal that neighboring metal pairs as reactive sites usually perform better than isolated active sites due to the created synergy. [14][15][16] Specically, the metal pair-site in dual-metal single-atom catalysts (DACs) shows superiority to the single site of SACs in breaking the O-O bond and promotes the ORR with a high energy conversion efficiency through a four-electron (4e − ) pathway.…”

Cyclic Extrusion Synthesis of Mesoporous Carbon-Supported Metal Catalysts for Selective Hydrogenation

“…Mesoporous carbon-supported metal catalysts are important carbon materials, which have been proved to be widely used in many areas, such as cross-coupling reaction, 1 selective hydrogenation, [2][3][4][5] selective oxidation, 6 and fuel cells. 7,8 The wide pore size and large pore volume of mesoporous carbon could provide an ideal platform for the dispersion of active metal species, and the sorption, reaction, and transfer of reactants, especially those big molecules. 9 There are usually two methods to prepare mesoporous carbon supports.…”