Ceo /Cus Nanoplates Electroreduce Co to Ethanol with Stabilized Cu Species.

Copper-based electrocatalysts effectively produce multicarbon (C ) compounds during the electrochemical CO reduction (CO RR). However, big challenges still remain because of the chemically unstable active sites. Here, cerium is used as a self-sacrificing agent to stabilize the Cu of CuS, due to the facile Ce /Ce redox.

Artificially steering electrocatalytic oxygen evolution reaction mechanism by regulating oxygen defect contents in perovskites.

The regulation of mechanism on the electrocatalysis process with multiple reaction pathways is more efficient and essential than conventional material engineering for the enhancement of catalyst performance. Here, by using oxygen evolution reaction (OER) as a model, which has an adsorbate evolution mechanism (AEM) and a lattice oxygen oxidation mechanism (LOM), we demonstrate a general strategy for steering the two mechanisms on various LaSrCoO. By delicately controlling the oxygen defect contents, the dominant OER mechanism on LaSrCoO can be arbitrarily transformed between AEM-LOM-AEM accompanied by a volcano-type activity variation trend.

Boosting the Electrocatalytic Oxygen Evolution of Perovskite LaCo Fe O by the Construction of Yolk-Shell Nanostructures and Electronic Modulation.

Realizing the rational design of perovskite oxides with controllable compositions and nanostructures remains a tremendous challenge for the development of efficient electrocatalysts. Herein, a ligand-assisted synthetic strategy to fabricate perovskite oxides LaCo Fe O with yolk-shell nanostructures is developed. Benefiting from the unique structural and compositional merits, LaCo Fe O exhibits an overpotential of 310 mV at a current density of 10 mA cm and long-term stability of 100 h for the oxygen evolution reaction.