CuCoO₂ nanocrystals derived from an isopropanol-modified Cu-BTC using alkaline water oxidation

Abstract

In this work, CuCoO2 (CCO) nanocrystals were derived from the Cu-BTC/Cu-BTC-IPA precursors through solvothermal method at 140 °C, and the electrocatalytic oxygen evolution reaction (OER) application of CCO catalysts were...

Gram-scale solvothermal synthesis of Fe-doped CuCoO2 nanosheets and improvement of the oxygen evolution reaction performance

“…In our previous works, 35,46 the product quality of Cu-BTC derived CuCoO 2 was only at the milligram level, and the low yield was not conducive to practical application. In order to improve the yield of the CCO product, the reactant concentrations of both copper and cobalt sources were expanded by 2 times and 10 times on the basis of our previous synthesis scheme.…”

“…In order to improve the yield of the CCO product, the reactant concentrations of both copper and cobalt sources were expanded by 2 times and 10 times on the basis of our previous synthesis scheme. 46 As shown in Fig. S1a, † the XRD patterns of these three samples are similar, and the diffraction peaks are indexed as pure phase CuCoO 2 (JCPDS card no.…”

“…Based on our previous reports on the synthesis of CuCoO 2 (CCO) crystals, 35,46 pure phase of CCO were prepared by a modified solvothermal route (see the Experimental section in the ESI †). For example, Cu-BTC-IPA, Co(NO 3 ) 2 •6H 2 O, NaOH and PVP were dissolved sequentially in the mixed solution of 20 ml deionized (DI) water and 50 ml ethanol (ET) and the precursor solution was stirred for a few hours at room temperature.…”

“…† There are two strong bonds and three weak bonds, which are concentrated at 277, 457, 504, 599 and 664 cm −1 , respectively. 46,50 The first peak at 277 cm −1 is the E g (O-Co-O bending) vibration mode perpendicular to the c-axis. 56 The second peak is located at 457 cm −1 , which belongs to the O-Cu I -O linear bond.…”

“…Herein, we investigated the preparation of Fe doped CuCoO 2 nanocrystals and their application in the OER in this work based on our previous works. 22,35,46 Firstly, optimal Cu-BTC-IPA-derived CuCoO 2 was synthesized by adjusting the process parameters such as reactant concentration, the Cu/Co ratio in precursors, mineralizer addition and polyvinylpyrrolidone surfactant (PVP). Secondly, different concentrations of the Fe dopant (1 at%, 3 at%, 5 at%) were introduced in CuCoO 2 through the solvothermal method, and the crystal structure, morphology, elemental composition, chemical state and doping substitution were tested and analyzed.…”