Synthesis of Water-Dispersible Single-Layer CoAl-Carbonate Layered Double Hydroxide

• DOI: 10.1021/acsami.7b02912
• Publication Date: 2017-06-07T14:57:50Z
• Authors: Haiping Li; Thanh-Nhan Tran; Byong-Jun Lee; Chunfei Zhang; Jong-Deok Park; Tong-Hyun Kang; Jong-Sung Yu
• Keywords: layered double hydroxide; Ethylene Glycol; LDH; Water Dispersible; Reaction Medium; Nitrate; Electrocatalytic; High Specific Surface Area; 01 natural sciences; Catalysis; Oxygen Evolution; oxygen evolution; Performances; single layer; Ethylene; Nanosheets; Exfoliation; Single Layer; Layered Double Hydroxides; Monolayers; catalysis; 540; Formamide; 0104 chemical sciences; Oxygen Evolution Catalysis; monolayers; Oxygen Evolution Efficiency; Anion Exchange; Delamination; Layered Double Hydroxide

Despite extensive study on single-layer layered double hydroxides (SL-LDHs) with NO3- counterions, SL-LDHs with CO32- counterions (CO32- SL-LDHs) have never been prepared before. Herein, a CoAl-CO32- SL-LDH which stays stable in water and powdery state is first synthesized using ethylene glycol as a reaction medium. The SL-LDH, with thickness of ∼0.85 nm, is composed of one Co(Al)O6 layer sandwiched between two CO32- layers. The SL-LDH powder shows high specific surface area (∼289 m2/g) and excellent electrocatalytic oxygen evolution efficiency. This work provides the first simple way to prepare CO32- SL-LDHs and will open an avenue for synthesizing other SL-LDHs.