Iron, Cobalt, and Nitrogen Tri‐Doped Ordered Mesoporous Carbon as a Highly Efficient Electrocatalyst for Oxygen Reduction Reaction

Construction of a Heterostructured Alloy-Molybdenum Nitride Catalyst for Enhanced NH3 Production via Nitrate Electrolysis

Here, we reported a highly efficient nitrate electroreduction (NO3RR) electrocatalyst that integrated alloying and heterostructuring strategies comprising FeCo alloy and Mo0.82N (FeCo-Mo0.82N/NC). Notably, the maximum NH3 Faraday efficiency (FE) of 83.24%, NH3 yield of 12.28 mg h-1 mgcat.-1, and good stability were achieved over FeCo-Mo0.82N/NC. Moreover, a Zn-NO3- battery assembled with FeCo-Mo0.82N/NC exhibited a power density of 0.87 mW cm-2, an NH3 yield of 14.09 mg h-1 mgcat.-1, and a FE as high as 76.31%.

Selective Electrocatalytic Reduction of Oxygen to Hydroxyl Radicals via 3-Electron Pathway with FeCo Alloy Encapsulated Carbon Aerogel for Fast and Complete Removing Pollutants

We reported the selective electrochemical reduction of oxygen (O₂ ) to hydroxyl radicals (^. OH) via 3-electron pathway with FeCo alloy encapsulated by carbon aerogel (FeCoC). The graphite shell with exposed -COOH is conducive to the 2-electron reduction pathway for H₂ O₂ generation stepped by 1-electron reduction towards to ^. OH. The electrocatalytic activity can be regulated by tuning the local electronic environment of carbon shell with the electrons coming from the inner FeCo alloy. The new strategy of ^. OH generation from electrocatalytic reduction O₂ overcomes the rate-limiting step over electron transfer initiated by reduction-/oxidation-state cycle in Fenton process. Fast and complete removal of ciprofloxacin was achieved within 5 min in this proposed system, the apparent rate constant (k_obs ) was up to 1.44±0.04 min^-1 , which is comparable with the state-of-the-art advanced oxidation processes. The degradation rate almost remains the same after 50 successive runs, suggesting the satisfactory stability for practical applications.