Oxygen-deficient 3D-ordered multistage porous interfacial catalysts with enhanced water oxidation performance. Issue 43 (30th October 2020) - Wang, Xuemin
Abstract : Constructing ordered multistage pore structures and controllable defects is accepted as an effective strategy to optimize the activity and stability of catalysts, but it is still restricted by synthesis technology. Abstract : Constructing ordered multistage pore structures and controllable defects is accepted as an effective strategy to optimize the activity and stability of catalysts, but it is still restricted by synthesis technology. Herein, an advanced highly-quality 3D-ordered macro-/mesoporous Co3 O4 /CeO2 heterostructure catalyst (3DOM-Co3 O4 /CeO2 ) was developed by combining two kinds of metal oxides with special intrinsic characteristics via a simple strategy. The as-prepared 3DOM-Co3 O4 /CeO2 shows ordered multistage interconnected mesoporous channels, which provide a sizable electrochemical active area and enrich the oxygen vacancy (OV) concentration at the Co3 O4 and CeO2 interface. As expected, 3DOM-Co3 O4 /CeO2 with the optimal ratio of Co/Ce (3DOM-CC-10) exhibits a satisfactory catalytic activity and remarkable cycling performance when evaluated as an anode material for the oxygen evolution reaction (OER). The superior OER performance of 3DOM-CC-10 can be attributed to its structure with many OVs, the synergy effect between the two kinds of metal oxides and the 3D-ordered multistage porous conductive networks.