Nitrogen functionalized carbon nanotubes as a support of platinum electrocatalysts for performance improvement of ORR using fuel cell cathodic half-cell

How to appropriately assess the oxygen reduction reaction activity of platinum group metal catalysts with rotating disk electrode

“…The following proposals are urgently to be motivated: (1) RHE should be used as RE as far as possible, and if other REs are adopted, their details of potential conversion vs. RHE should be illustrated, and there is no need to conduct iR-drop correction if Luggin capillary is placed correctly in TF-RDE test; (2) To simulate the standard MEA polarization protocol proposed by DOE and narrow the gap of ORR activities obtained via TF-RDE and MEA, reciprocating LSV/SCV should be performed to characterize the ORR performances of PGMs; (3) Connotations like M A and S A should be defined precisely, and K-L equation as well as the selection of j L should be emphasized; (4) The details of calculation processes, such as m Pt , j A , j L , and ECSA et al., should be listed in article or supplemental information for the better readability for readers. Furthermore, considering the limited mass transport in TF-RDE and its discrepancy in test conditions with respect to MEA, whose fabrication process is very much an art, floating electrode ( Lin et al., 2020 ; Zalitis et al., 2013 ) and gas diffusion electrode ( Inaba et al., 2018 ; Mardle et al., 2020 ; Roudbari et al., 2020 ) techniques have been proposed in recent years and are under rapid development to bridge the activity gap between TF-RDE and MEA while maintaining its simplicity, convenience, and controllability.…”

Surface Diels–Alder adducts on multilayer graphene for the generation of edge-enriched single-atom FeN4 sites for ORR and OER electrocatalysis

“…Coordinated iron sites have received much attention in recent years due to their applicability as catalysts in the energy eld, substituting expensive noble metal catalysts mainly consisting of platinum. [66][67][68][69] Accordingly, Fe(III) nitrate was combined with MLG-dppz to produce MLG-dppz@Fe, whose structure is tentatively proposed in Fig. 1 by analogy to ironbipyridine complexes, which have been used for the activation of dioxygen to oxidize unsaturated hydrocarbons.…”

“…OER potentials (vs. Ag/AgCl) were calibrated with reference to the reversible hydrogen electrode (RHE) using the Nernst equation. [66][67][68] E RHE ¼ E Ag/AgCl + 0.1976 + 0.059pH…”

How to Appropriately Assess the Oxygen Reduction Reaction Activity of Platinum Group Metal Catalysts with Rotating Disk Electrode

“…PEMFCs is of crucial importance to realize the carbon-neutral society for the sustainable development of human kind (Asset and Atanassov, 2020), and enormous advances have been achieved on mechanism study, catalyst synthesis/characterization, MEA simulation/fabrication, and even preliminary commercialization of electric vehicles during the last decade (Deng et al, 2020;E4tech, 2018;Wang et al, 2020b (3) Connotations like M A and S A should be defined precisely, and K-L equation as well as the selection of j L should be emphasized; (4) The details of calculation processes, such as m Pt , j A , j L , and ECSA et al, should be listed in article or supplemental information for the better readability for readers. Furthermore, considering the limited mass transport in TF-RDE and its discrepancy in test conditions with respect to MEA, whose fabrication process is very much an art, floating electrode (Lin et al, 2020;Zalitis et al, 2013) and gas diffusion electrode (Inaba et al, 2018;Mardle et al, 2020;Roudbari et al, 2020) techniques have been proposed in recent years and are under rapid development to bridge the activity gap between TF-RDE and MEA while maintaining its simplicity, convenience, and controllability.…”