Transition metal phthalocyanine-modified shungite-based cathode catalysts for alkaline membrane fuel cell

Iron and cobalt containing electrospun carbon nanofibre-based cathode catalysts for anion exchange membrane fuel cell

“…similarly as in our previous study [26]. After drop-casting the ink onto the polished and cleaned [27] glassy carbon (GC, A = 0.196 cm 2 ) electrodes (GC-20SS, Tokai Carbon, Japan), the NPMC loading of 0.2 and 0.8 mg cm −2 was used for the experiments in alkaline and acidic media, respectively.…”

“…The membrane-electrode assembly (MEA) was prepared using poly[2,2′-(2,2′′,4,4′′,6,6′′hexamethyl-p-terphenyl-3,3′′-diyl)-5,5′-bibenzimidazole] (HMT-PMBI) anion exchange membrane (AEM) with benzimidazolium cationic groups [29], gas-diffusion layer (GDL, Sigracet 28BC), NPMC or Pt/C at the cathode and Pt-Ru/C (50:25:25 by weight, Alfa Aesar) at the anode. According to the previously published procedure [22,26], the catalyst loadings of 2 mgNPMC cm −2 (or 0.4 mgPt cm −2 ) and 0.6 mgPt-Ru cm −2 at the gas diffusion electrodes were used for cathode and anode, respectively . The catalyst-coated GDL and the AEM were nm, respectively.…”

One-dimensional polymer-derived ceramic nanowires with electrocatalytically active metallic silicide tips as cathode catalysts for Zn–air batteries

“…The j-E curves presented for ORR are recorded in the cathodic direction and the polarization curves for OER in anodic direction. 40 Both the OER and ORR j-E curves have been iR compensated using the ohmic resistance values obtained with electrochemical impedance spectroscopy. 41 For the construction of the Zn-air battery, 6 mg of ceramic catalyst and 12 mg of 5% Naon ionomer solution (Sigma-Aldrich) were dispersed in 0.7 ml of ethanol by sonication for 1 h. The prepared ink was spread on a commercial gas diffusion layer (GDL, SGL DC -35) by hand brush coating technique with the geometric area (A) of 2.25 cm 2 to obtain the air electrode with a loading of 1 mg cm À2 .…”

Bimetal Phthalocyanine‐Modified Carbon Nanotube‐Based Bifunctional Catalysts for Zinc‐Air Batteries

“…Such as, MÀ NÀ C type catalysts derived from different metal phthalocyanines (MPcs) in the combination of various carbon supports have been prepared and studied towards the ORR, OER and for both, the ORR and OER processes. [39][40][41][45][46][47][48][49][50][51][52][53] Firstly, in most of the earlier studies, MN 4 macrocyclic complexes have been immobilised onto graphite or carbon materials as conductive support via physical adsorption to prepare MN 4 -type catalysts. These MN 4 -based catalysts however do not have the long-term stability, thus, for high electrocatalytic activity and stability, pyrolysis is necessary.…”

“…Another interesting way to form M‐N x centres and metal oxides in carbon matrix is to use MN 4 macrocyclic compounds (e. g. transition metal phthalocyanines or porphyrins) for this purpose. Such as, M−N−C type catalysts derived from different metal phthalocyanines (MPcs) in the combination of various carbon supports have been prepared and studied towards the ORR, OER and for both, the ORR and OER processes [39–41,45–53] . Firstly, in most of the earlier studies, MN 4 macrocyclic complexes have been immobilised onto graphite or carbon materials as conductive support via physical adsorption to prepare MN 4 ‐type catalysts.…”