Charge Transfer of Interfacial Catalysts for Hydrogen Energy

Abstract

The development of multifunctional non-precious transition metal electrocatalysts is technologically significant in hydrogen and oxygen electrochemistry but challenging. Here we exploit interface engineering to construct a novel interface catalyst of Ni3N and Co2N that exhibits multifunctional hydrogen and oxygen electrochemical activities in alkaline media. The interface catalysts of Ni3N/Co2N show superior bifunctional activity for hydrogen electrochemistry comparable to the state-of-the-art Pt catalyst, as well as high oxygen evolution reaction activity. Furthermore, the multifunctional Ni3N/Co2N interface electrocatalysts demonstrate excellent applications in water splitting for H2 generation and a highly stable Swagelok-type Ni–H battery for H2 utilization. Density functional theory calculations further confirm that the interfacial charge transfer from Ni to Co and N in Ni3N/Co2N efficiently enhances the dissociative adsorption of H2 and optimizes the adsorption configurations and binding energies of the intermediate hydrogen and hydroxide in the multifunctional reactions.

Low-temperature water electrolysis: fundamentals, progress, and new strategies

“…14d). 173 Besides the soluble redox mediators, solid-state redox mediators have also been developed including NiOOH/ Ni(OH) 2 and MnO 2 /MnOOH, [288][289][290][291][292] even though they are only stable in strong alkaline solutions and their redox capacities are limited by their electrode areas and mass loading. The decoupled water splitting concept is further extended to solar-driven decoupled water splitting.…”

A Multifunctional Gradient Solid Electrolyte Remarkably Improving Interface Compatibility and Ion Transport in Solid-State Lithium Battery

“…12−16 Therefore, the selection and optimization of battery components has become one of the research hotspots. 17,18 The use of gel polymer electrolytes (GPEs) to reduce contact resistance is a viable approach to the lithium-ion battery design. GPEs are able to trap liquid electrolytes in the electrode while adhering to a solid electrolyte separator, helping to reduce contact resistance and improve ionic conductivity.…”

“…With the increasing demand for high energy density and high safety performance batteries, solid-state lithium batteries with high energy density and good safety performance have attracted widespread attention and have great potential for applications. , However, solid-state lithium batteries also face some key problems that need to be solved such as low ionic conductivity and high interface impedance due to solid-state contact. Therefore, it is necessary to further optimize the components and structure of batteries. − For separators, it is necessary mainly to separate the anode and cathode of the battery to prevent short circuit, while allowing the rapid transmission of lithium ions. − For electrolytes, it is expected to have high conductivity and ion migration number, wide electrochemical window, and good stability. − Therefore, the selection and optimization of battery components has become one of the research hotspots. , …”

Strong electronic metal–support interaction between Pt and stainless mesh for enhancing the hydrogen evolution reaction

“…3,4 In this regard, with the low overpotential and fast charge transfer kinetics, Pt-based materials exhibit the best electrocatalytic activity for the hydrogen evolution reaction (HER). 5 Unfortunately, the high cost and low crustal abundance hinder their large-scale application. Consequently, it is necessary to devote great efforts to enhancing the utilization efficiency of Pt-based catalysts.…”