Self-sacrificial reconstruction of MoO42− intercalated NiFe LDH/Co2P heterostructures enabling interfacial synergies and oxygen vacancies for triggering oxygen evolution reaction

Machine learning-assisted optimization of multi-metal hydroxide electrocatalysts for overall water splitting

“…In addition, prior literature also suggest that Mo doping could induce redistribution of the surface electron density to accelerate charge transfer and promote the formation of the *OOH intermediate for NiFe LDH structures as well. 11,68,71,75 Congruent with these prior observations, NN-12 also exhibits significantly lower charge transfer resistance ( R ct ) than the original NiFe LDH, 39 as observed from electrochemical impedance spectroscopy (Fig. S5.4, ESI†).…”

“…11 Although studies on molybdate-intercalated CoFe are limited, molybdate intercalation into NiFe LDH structures have been widely studied, particularly for improving the electrocatalytic activity for OER. To elaborate, the molybdate species were found to facilitate the reconstruction of the OER-active M-OOH phases, 71–73 by undergoing dissolution and re-adsorption process at OER conditions. Molybdate anions were similarly observed to promote the reconstruction of α-Co(OH) 2 nanosheets to active Co-OOH phases, 74 and we posit similar effects may be operating in our NN-12 sample.…”

“…Higher initial overpotentials observed is common amongst similar catalysts, 79 and may be attributed to the ongoing reconstruction of the catalysts as these foam electrodes are not pre-treated. Apart from the formation of active metal hydroxide phases, 48,80 the reconstruction process may also include dynamic dissolution and re-adsorption of the molybdate anions [71][72][73][74]81 as mentioned earlier. No significant degradation was observed from LSV measured after 10 h (Fig.…”

Recent Advances of Modified Ni (Co, Fe)-Based LDH 2D Materials for Water Splitting

“…This work provides an efficient approach to develop advanced electrocatalysts through constructing an n-p and p-p junction with a strong ability for OH − adsorption [ 78 , 79 ]. In short, metal phosphides hybridized with LDH usually possess excellent electrocatalytic performance in water splitting with several hundred current densities up to 300 mA cm −2 , especially for their superior OER activities [ 78 , 80 , 81 ].…”

Facile synthesis of a medium-entropy CoNiFe subacetate nanoprism for high efficiency oxygen evolution reaction

“…[10][11][12] In recent years, non-noble metal-based materials, especially metal hydroxides, have received extensive attention in the field of the electrocatalytic OER due to their adjustable structure, composition, morphology, and high intrinsic catalytic activity. [13][14][15][16] Among them, medium-entropy hydroxides, as unique emerging materials, are an ideal system for designing advanced electrocatalysts. Compared with binary catalysts, medium-entropy materials with a rich component modulation range, complex surface and interface structure have great application prospects.…”