Synthesis of mesoporous LiMn₂O₄and LiMn_2−xCo_xO₄thin films using the MASA approach as efficient water oxidation electrocatalysts

Abstract

The molten-salt assisted self-assembly (MASA) process is applicable to fabricate high quality mesoporous metal lithiate thin films that exhibit excellent performance as electrocatalysts for water oxidation.

Synthesis and water oxidation electrocatalytic and electrochromic behaviours of mesoporous nickel oxide thin film electrodes

“…The Tafel slope (62 mV dec À1 ) of the electrode (m-NiO-10-450) is comparable to that of cobalt and nickel-based water oxidation electrocatalysts in the literature. [32][33][34][35][36][37] The overpotentials, extracted from the Tafel equation, are 288 and 350 mV at current densities of 1 and 10 mA cm À2 , which are quite consistent with the experimental values once the IR drop is subtracted from the experimental data.…”

“…6(c)). 33 The overpotentials are around 0.263 and 0.330 V at 1 and 10 mA cm À2 , respectively, and 0.406 V at a higher current density of 80 mA cm À2 , aer IR compensation.…”

Modification of Mesoporous LiMn2O4 and LiMn2−xCoxO4 by SILAR Method for Highly Efficient Water Oxidation Electrocatalysis

“…[12][13][14][15][16][17] Most studies show that the cobalt is a key element for an efficient OER such that incorporation of cobalt into manganese oxide lattice improves the OER efficiency and stability of a modified electrode. [17] Mesoporous metal oxides have been targeted as efficient electrocatalysts for the OER. Several synthetic protocols, including hard and soft templating methods have been developed to produce mesoporous metal oxides.…”

“…In the fabrication of mesoporous LiMn 2−x Co x O 2 (m-LiMn 2−x Co x O 4 ) electrodes and their modifications using a small amount of cobalt have been carried by using two different synthesis protocols. In the first protocol, a previously established MASA [17] process has been employed to produce the thin film electrodes over the fluoride doped thin oxide (FTO)-coated glass substrates (m-…”

“…It has been pre-viously shown that the m-LiMn 1.5 Co 0.5 O 4 electrode (25% Co) has a good performance and stability in the OER at alkaline conditions, see Figure 5b. [17] To determine the ideal cobalt ratio, a set of electrodes were prepared by using 5-25% cobalt nitrate in the initial synthesis solutions and the fabricated electrodes were tested for their stability in OER process in alkaline media. Figure S12 (Supporting Information).…”