Advances in reactive co-precipitation technology for preparing high-performance cathodes

An interface-engineered Co2P/CoMoP2 heterojunction with greatly improved electrocatalytic activity in water/seawater splitting

“…[12][13][14] Currently, among numerous transition metal-based electrocatalysts, transition metal phosphides have demonstrated reliable catalytic performance for both the HER and OER. 15,16 Due to the large atomic radius and strong electronegativity of phosphorus (P) atoms, the interaction between metal atoms is weakened and the outermost electrons of metals tend to be influenced by P atoms, leading to a contraction of metal d-bands, and an increase in the density of states near the Fermi level. 17,18 Consequently, phosphides retain both metallic properties and conductivity and also exhibit a favorable adsorption free energy for H intermediates, making phosphides suitable candidates for water electrolysis catalysts.…”

Joule Heating Synthesis of Cobalt Molybdate with Unsaturated Mo4+ Coordination for Greatly Enhanced Electrocatalytic Nitrate Reduction to Ammonia

“…Additionally, this reaction has the potential to generate a significant amount of by-products, including NO 2 – , N 2 , and NH 2 NH 2 , etc. , These by-products result in electron depletion during the reaction process and low NH 3 selectivity. , Therefore, it is imperative to design an electrochemical nitrate reduction catalyst with a high selectivity and activity. In nature, the NO 3 RR process occurs via an enzymatic cascade reaction, with the active center of natural nitrate reductase being the Mo site. , Inspired by these nitrate reductases, a number of Mo-based catalysts have been reported to be applied to the nitrate reduction process in recent years, e.g., Ce-MoS 2– x , MoO 2 –C NBF, and Mo 2 C . However, the NO 3 RR activity of these Mo-based catalysts was not very excellent, mainly stemming from the difficulty of adjusting the valence state of Mo-based catalysts .…”

“…In nature, the NO 3 RR process occurs via an enzymatic cascade reaction, with the active center of natural nitrate reductase being the Mo site. 18,19 Inspired by these nitrate reductases, a number of Mobased catalysts have been reported to be applied to the nitrate reduction process in recent years, e.g., Ce-MoS 2−x , 20 MoO 2 −C NBF, 19 and Mo 2 C. 21 However, the NO 3 RR activity of these Mo-based catalysts was not very excellent, mainly stemming from the difficulty of adjusting the valence state of Mo-based catalysts. 19 Modulation of the oxidation states of each element and the electron environment around atoms, particularly metal centers of unsaturated coordination environments, is further considered to promote the adsorption of reactant NO 3 − and intermediates, thereby tuning their electrocatalytic performance.…”

Adjusting Ion Diffusion Kinetics of Li Deposition Enabled by an Elastic Porous Melamine Sponge Host for Stable Lithium Metal Anodes

“…Nevertheless, issues such as the infinite volume stress and inhomogeneous electric field distribution during the Li plating/stripping process, especially at a high current density and capacity, would easily give rise to interface cracking, inevitably worsening cyclability. 21,22 Guided by Sand's model, the 3D conductive hosts possess an enlarged electrochemically active area, which can effectively disperse the local current density to alleviate the growth of dendritic Li and provide wide diffusion pathways for electrons and ions, 23−27 which is considered to be a crucial strategy for Li metal anodes. However, the numerous 3D hosts now more or less display actual shortcomings.…”

“…Li metal anodes can endow lithium metal batteries with high energy density due to their high capacity of 3680 mAh g –1 and low reduction potential (−3.04 V vs standard hydrogen electrode). − However, both the uncontrollable Li dendrite growth and corresponding large volume expansion seriously hinder their practical application. − Many strategies have been applied to suppress Li dendrite growth, such as electrolyte additives, − an artificial solid electrolyte interphase (SEI), − and a solid-state electrolyte, − and aim to stabilize the Li/electrolyte interface and induce Li uniform deposition. Nevertheless, issues such as the infinite volume stress and inhomogeneous electric field distribution during the Li plating/stripping process, especially at a high current density and capacity, would easily give rise to interface cracking, inevitably worsening cyclability. , Guided by Sand’s model, the 3D conductive hosts possess an enlarged electrochemically active area, which can effectively disperse the local current density to alleviate the growth of dendritic Li and provide wide diffusion pathways for electrons and ions, − which is considered to be a crucial strategy for Li metal anodes. However, the numerous 3D hosts now more or less display actual shortcomings.…”