• Energy Research

Chemical composition of the discharge products as well as charging overpotential of the Na–air cell is correlated with the kinetic parameters.

3D cross-linked CoSe2–NiSe2nanosheets were grown on nickel foam by an electrodeposition route and demonstrated high OER activity.

Correction for ‘Manipulation of oxygen evolution reaction kinetics of a free-standing CoSe2–NiSe2 heterostructured electrode by interfacial engineering’ by Muhammad Rauf et al., Sustainable Energy Fuels, 2022, 6, 5392–5399, https://doi.org/10.1039/D2SE01259F.

Nitrogen-doped graphene as a metal-free catalyst for oxygen reduction was synthesized by heat-treatment of graphene using ammonia. It was found that the optimum temperature was 900 °C. The resulting catalyst had a very high oxygen reduction reaction (ORR) activity through a four-electron transfer process in oxygen-saturated 0.1 M KOH. Most importantly, the electrocatalytic activity and durability of this material are comparable or better than the commercial Pt/C (loading: 4.85 µgPt cm−2). XPS characterization of these catalysts was tested to identify the active N species for ORR.

AbstractA fuel cell is an energy conversion device that can continuously input fuel and oxidant into the device through an electrochemical reaction to release electrical energy. Although noble metals show good activity in fuel cell‐related electrochemical reactions, their ever‐increasing price considerably hinders their industrial application. Improvement of atom utilization efficiency is considered one of the most effective strategies to improve the mass activity of catalysts, and this allows for the use of fewer catalysts, saving greatly on the cost. Thus, single‐atom catalysts (SACs) with an atom utilization efficiency of 100% have been widely developed, which show remarkable performance in fuel cells. In this review, we will describe recent progress on the development of SACs for membrane electrode assembly of fuel cell applications. First, we will introduce several effective routes for the synthesis of SACs. The reaction mechanism of the involved reactions will also be introduced as it is highly determinant of the final activity. Then, we will systematically summarize the application of Pt group metal (PGM) and nonprecious group metal (non‐PGM) catalysts in membrane electrode assembly of fuel cells. This review will offer numerous experiences for developing potential industrialized fuel cell catalysts in the future.

Cobalt phosphide is an effective electrocatalyst for NO3− electroreduction into NH3. Phosphorus is crucial for stabilizing the active phase and optimizing energy barriers, and Co 4p orbitals directly participate in the nitrate reduction.