Rational design of septenary high-entropy alloy for direct ethanol fuel cells

Electronic and Coordination Effect of PtPd Nanoflower Alloys for the Methanol Electrooxidation Reaction

“…The CV studies of the Pt 1 Pd 1 -N NFs/CP show two significant redox peaks at 0.1–0.4 V (oxidation of H upd ) and ∼0.8 V (formation of adsorbed hydroxyl/oxygen species) vs RHE, respectively, which are weak in Pt 1 -N NFs/CP. These results illustrate that the introduction of Pd provides more electrochemical active sites and active oxygen species beneficial to oxidation reaction in Pt 1 Pd 1 -N NFs/CP, which may be ascribed to the synergy between Pt and Pd. , The integration of the copper underpotential deposition region gives a high ECSA of 73.29 m 2 g Pt+Pd –1 for Pt 1 Pd 1 -N NFs/CP among these catalysts, about 1.9 times to 20 wt % Pt/C (39.23 m 2 g Pt –1 ) (Figures S4–S6). It should be noted that the low metal loading in Pt 1 -N NFs/CP and Pd 1 -N NFs/CP samples makes their mass normalized ECSA much larger than that of Pt 1 Pd 1 -N NFs/CP; however, the apparent ECSA are very small (Figure S4a,b).…”

Recent advances in zinc–air batteries: self-standing inorganic nanoporous metal films as air cathodes

“…The power density at specific potentials can be calculated using the polarization curve by multiplying the corresponding current density and voltage. 14,[40][41][42] The power density is a crucial activity descriptor for ZABs, and good ZABs should have a relatively high power density. [43][44][45][46] In the case of rechargeable ZABs, the air electrode must possess good OER activity to minimize the charge/discharge potential gap (or round-trip overpotentials) for optimal performance.…”

“…Therefore, there is an urgent need to develop self-supported INMFs with high ECSA to promote the commercialization of ZABs and fuel cells. 40,42,105,106 Recently, Gustav W. Sievers et al 73 reported self-supported Pt-CoO networks with a high surface area and high specific activity for the ORR. The nanoporous Pt-CoO networks were prepared using alternating magnetron sputtering of Co and Pt layers, followed by acid leaching of the non-noble CoO component.…”

“…Therefore, there is an urgent need to develop self-supported INMFs with high ECSA to promote the commercialization of ZABs and fuel cells. 40,42,105,106…”

Hybrid water electrolysis with integrated and cascading reactions using two-dimensional electrocatalysts

“…31 Accordingly, using the selected reactions to replace the OER and assemble a hybrid electrolyzer can deliver higher current density with lower voltage input, increasing the energy conversion efficiency. Nowadays, various emerging anodic reactions as OER alternatives have been investigated, including simple compound electrooxidation (i.e., urea oxidation reaction 32,33 and hydrazine oxidation 34,35 ) and complex compound electrooxidation 20 (i.e., ethanol oxidation [36][37][38][39] and HMF oxidation [40][41][42] ) are proven. Theoretically, these reactions generally show lower electrochemical potential than the OER, leading to lower overpotentials for hybrid water splitting and boosting HER performance.…”