Hierarchical Co(OH)F/CoFe-LDH heterojunction enabling high-performance overall water-splitting

Abstract

Due to the serious energy and environmental issues, hydrogen generation via water splitting has been regarded as a green and promising alternative strategy to the use of fossil fuels.

Recent Advances of Transition Metal Basic Salts for Electrocatalytic Oxygen Evolution Reaction and Overall Water Electrolysis

“…To the best of our knowledge, there has no report about pure transition metal basic salts for HER and overall water splitting due to its poor instrinsic activity. However, modification strategies including but not limited to design of morphology/dimension [163,164], modulation of electronic structure [147,165], and interface engineering [95,166,167] have been introduced to improve the HER activity of metal basic salts. As a result, bimetallic and hetero-structured basic salts were employed as HER and further water splitting catalysts.…”

“…Moreover, Wang et al fabricated hetero-structured Co(OH)F@CoFe-LDH/NF catalyst via a facile two-step approach and used to overall water splitting (Fig. 11e, f) [95]. The author declared that the synergistic effect at the interface that generated by covering CoFe-LDH nanosheets on Co(OH)F nanorod was favorable to catalytic activity.…”

“…to exhibit better OER performance than their hydroxide counterparts and among the best non-noble metal-based electrocatalysts regardless of the type of anion [91][92][93][94]. Furthermore, highly active TM basic salt-based catalysts have been designed for OER and even overall water splitting through cation doping and construction of heterostructure [95][96][97][98]. Of note is that TM basic salts are partially or even fully oxidized to the MOOH during OER process.…”

Dealloying/exsolution-induced nanoporous perovskite oxides anchored with alloy nanoparticles for the oxygen evolution reaction

“…We compared the OER activity of our catalysts with those of some other CoFe-or perovskite oxide-based electrocatalysts (Table 1). 30,32,[38][39][40][41][42][43][44][45][46] The comparison suggests that the OER activities of R-LCF19 and R-LCF28 in this manuscript are parallel to or better than those of some LaFeO 3 -based perovskite oxides but are inferior compared with CoFe-based electrocatalysts. The results further confirm that the more active CoFe phase enhances the OER activity of the perovskites.…”

Construction of N-doped nickel sulfide nanosheets via PANI as a nitrogen donor for superior electrocatalytic water splitting

“…3,4 Water electrolysis for hydrogen production is a significant step towards promoting sustainable development and developing green energy. 5,6 The oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) are the two main electrocatalytic processes in water splitting. 7,8 While many research projects concentrate on enhancing the performance of either the HER or OER, it is challenging but essential to generate a bifunctional catalyst that performs admirably in both processes.…”