A simple, rapid and scalable synthesis approach for ultra-small size transition metal selenides with efficient water oxidation performance

Abstract

Transition metal-based nanomaterials are regarded as promising catalysts due to low cost and abundant reserves. In particular, transition metal-based selenide exhibit excellent capability for oxygen evolution reaction (OER). However, the...

Direct Bottom-Up In Situ Growth: A Paradigm Shift for Studies in Wet-Chemical Synthesis of Gold Nanoparticles

“…Specifically, the exceptional structure-dependent optical properties make plasmonic (and photonic) metamaterials attractive for different fields, such as photocatalysis, biosensing, energy harvesting, and photonics. For example, one recent plasmonic metasurface design attracting attention are nanoparticle superlattices consisting of microscale patch arrays in which every unit is made up of finite nanosized particles. − Such structures can be fabricated using soft-lithographic techniques in combination with colloidal synthesis, , increasing the number and complexity of the plasmonic response for highly tunable collective optical properties, , with promising results for both standard and multiwavelength SERS measurements. ,,− While in situ growth generally produces a monolayer of nanoparticles, the implementation of multiple growth steps combined with layer-by-layer fabrication or top-down methods could be utilized to produce 3D plasmonic materials. These combinations could enable the preparation of Moiré lattices, composed by the superposition of two or more layers of plasmonic arrays with controlled twisting angles with respect to one another, which could be chiral and/or provide highly confined resonances with low optical losses. , Such structures have already been realized utilizing BCML-based fabrication .…”

Modulating the Electronic Structure on Cobalt Sites by Compatible Heterojunction Fabrication for Greatly Improved Overall Water/Seawater Electrolysis

“…Water electrolysis has been considered as an economical and effective method to produce clean hydrogen gas (H 2 ) and oxygen gas (O 2 ). − Currently, precious metal-based electrocatalysts are still the mostly effective water splitting catalysts. However, their high cost hinders the wide applications. − Therefore, design and synthesis of cost-effective catalysts with good reactivity has become a hot research spot to satisfy industrial production of H 2 and O 2 . ,− Recently, benefiting from the low cost and high chemical stability, cobalt selenide has received extensive attentions in electrocatalytic water splitting. − However, the catalytic performance of cobalt selenide is poor due to the sluggish water splitting kinetics. Hence, methods to optimize the activity of cobalt selenide need to be further developed.…”

Design of a High-Efficiency Bifunctional Electrocatalyst: Rich-Nitrogen-Doped Reduced Graphene Oxide-Modified Carbon Cloth-Growing Nickel–Iron Complex Oxides for Overall Water Splitting

“…14,15 Unfortunately, because of the scarcity and high cost, these precious metalbased electrocatalysts with their large-scale practical applications are strictly limited. 16,17 By all means, the search for lesspriced and highly efficient nonprecious metal catalysts has become an inevitable trend. 4,8 Compared with commercial noble metal electrocatalysts, the active centers of transition metal-based electrocatalysts are abundant for reserves of transition metals in the earth's crust.…”

“…4,8 Compared with commercial noble metal electrocatalysts, the active centers of transition metal-based electrocatalysts are abundant for reserves of transition metals in the earth's crust. 17,18 The richer the transition metal elements, the lower the hydrogen production cost. 3,19 Besides that, the transition metal-based compound materials have more stable properties in both acidic and alkaline electrolytes, and they are not easy to decompose.…”

“…However, the hydrogen produced by electrochemical splitting of H 2 O molecules accounts for about 4% of the global hydrogen production, primarily because the electrochemical hydrolysis requires sufficient potential to promote the development of hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) Consequently, it is necessary to develop highly efficient catalysts to reduce the overpotentials required for electrolytic water splitting . At present, the most effective electrocatalysts for HER and OER are noble metal catalysts based on platinum, iridium, and ruthenium. , Unfortunately, because of the scarcity and high cost, these precious metal-based electrocatalysts with their large-scale practical applications are strictly limited. , By all means, the search for less-priced and highly efficient nonprecious metal catalysts has become an inevitable trend. , Compared with commercial noble metal electrocatalysts, the active centers of transition metal-based electrocatalysts are abundant for reserves of transition metals in the earth’s crust. , The richer the transition metal elements, the lower the hydrogen production cost. , …”