A dual-strategy of interface and reconstruction engineering to boost efficient alkaline water and seawater oxidation

Abstract

Seawater electrolysis under alkaline conditions represents a sustainable approach to mass production of carbon-neutral hydrogen energy. However, the lack of efficient electrocatalysts restrict the development of this technology. Herein, core-shell-structured...

Homogenic Boundary Effect Boosted Oxygen Evolution Reaction in α/β‐NiMoO4 for Rechargeable Aqueous Zn‐Air Battery

“…This process left behind only the pure NiOOH phase, indicating the surface reconstruction alongside the faster dissolution of MoO 4 2− (Figure 5c). [38] Therefore, NMO-600 exhibits improved kinetics with Ni 3+ oxidization from Ni 2+ during surface reconstruction at a potential shift of ≈150 mV compared to NMO-400 (Figure 5d). Excepting for electrocatalytic activity, the durability of NMO-600 in Figure 5e demonstrates that the overpotential at 10 mA cm −2 increased just by 14 mV after 165 h of cycling (inset).…”

“…In general, the lower d‐band center could correspond to the weaker binding strength of adsorbates such as H* and OH*, due to the higher filling of the antibonding states. [ 36 ] Thus, the results indicate that interface atoms in α/β‐NiMoO 4 favor less antibonding state filling when binded to reaction intermediates of OER and fast kinetics for efficient OER. The ORR activity of these electrocatalysts was also evaluated.…”

Fabrication of a hierarchical NiTe@NiFe-LDH core-shell array for high-efficiency alkaline seawater oxidation

“…Constructing a 3D hierarchical structure using a conductive core is a promising strategy for improving its electrical conductivity and exposing more active sites, thus promoting catalytic activity. 35 , 36 , 37 , 38 , 39 Wang et al. reported the fabrication of NiFe-LDH on NiMoO 4 nanorod, increasing the active surface area, allowing for faster kinetics.…”

Engineered Superhydrophilic/Superaerophobic Array Electrode Composed of NiMoO4@NiFeP for High-Performance Overall Water/Seawater Splitting

“…24−26 Meanwhile, transition-metal oxides (TMOs) are attractive OER electrocatalysts in view of their tunable chemical composition, cost effectiveness, ease of synthesis methods, and high activity in alkaline media. 27,28 Thus, a uniquely heterostructured catalyst consisting of multi-interfaces between phosphides and oxides may show intriguing electronic properties and optimized adsorption capacity for different intermediates thereby effectively promoting the HER/OER catalytic activity. Moreover, for gas−liquid−solid-involving electrocatalysis, the electrolyte-to-surface mass transport and gas bubble management exert a profound impact to determine the catalytic performance, which is closely related to the catalyst architecture and catalyst surface wetting properties.…”

“…Engineering heterostructures represents one of the most powerful strategies to develop efficient non-noble-metal-based catalysts for water electrolysis. − The enriched heterointerfaces between different functional components allows for the sufficient exposure of active sites and, more importantly, the tuning of the catalyst’s electronic structure, leading to the altered adsorption free energies of reaction intermediates and thereby the enhanced water splitting intrinsic catalytic activity. , Transition-metal phosphides (TMPs), especially multi-phase TMPs, are known to be potential HER electrocatalysts due to their unique electronic configurations, high conductivity, and outstanding mechanical robustness. − Meanwhile, transition-metal oxides (TMOs) are attractive OER electrocatalysts in view of their tunable chemical composition, cost effectiveness, ease of synthesis methods, and high activity in alkaline media. , Thus, a uniquely heterostructured catalyst consisting of multi-interfaces between phosphides and oxides may show intriguing electronic properties and optimized adsorption capacity for different intermediates thereby effectively promoting the HER/OER catalytic activity. Moreover, for gas–liquid–solid-involving electrocatalysis, the electrolyte-to-surface mass transport and gas bubble management exert a profound impact to determine the catalytic performance, which is closely related to the catalyst architecture and catalyst surface wetting properties. , Well-aligned nanoarrays (nanorods, nanosheets, etc.)…”