Heterostructured mixed metal oxide electrocatalyst for the hydrogen evolution reaction

Abstract

The hydrogen evolution reaction (HER) has attracted considerable attention lately because of the high energy density and environmental friendliness of hydrogen energy. However, lack of efficient electrocatalysts and high price hinder its wide application. Compared to a single-phase metal oxide catalyst, mixed metal oxide (MMO) electrocatalysts emerge as a potential HER catalyst, especially providing heterostructured interfaces that can efficiently overcome the activation barrier for the hydrogen evolution reaction. In this mini-review, several design strategies for the synergistic effect of the MMO catalyst on the HER are summarized. In particular, metal oxide/metal oxide and metal/metal oxide interfaces are explained with fundamental mechanistic insights. Finally, existing challenges and future perspectives for the HER are discussed.

In Situ Design of a Nanostructured Interface between NiMo and CuO Derived from Metal–Organic Framework for Enhanced Hydrogen Evolution in Alkaline Solutions

“…Within heterostructured mixed metal oxides (MMO), the heterojunction demonstrates superior HER activity compared to alloys or oxide composites. This superiority is attributed to the heterojunction, which provides MMOs with a more exposed active site than what is observed in alloys or oxide composites . Wei and colleagues fabricated concave surface microcubes composed of NiO/Co 3 O 4 using a MOF precursor (Ni 3 [Co­(CN) 6 ] 2 ).…”

“…This superiority is attributed to the heterojunction, which provides MMOs with a more exposed active site than what is observed in alloys or oxide composites. 53 Wei and colleagues 54 fabricated concave surface microcubes composed of NiO/Co 3 O 4 using a MOF precursor (Ni 3 [Co(CN) 6 ] 2 ). The resulting catalyst facilitated electrolyte penetration, promoting favorable HER kinetics and exhibiting an overpotential of 169.5 mV to achieve 10 mA cm –2 .…”

The current state of transition metal-based electrocatalysts (oxides, alloys, POMs, and MOFs) for oxygen reduction, oxygen evolution, and hydrogen evolution reactions

“…Metal oxides are commonly used electrocatalysts for OER due to their compositional and structural diversity, flexible tunability, low cost, abundance, and environmental friendliness (Mladenović et al, 2023a). Although pristine metal oxides are generally unsatisfactory for practical applications due to stability issues and unfavorable binding strength, mixed metal oxides are seen as a possible workaround due to the synergy of the properties of their pristine counterparts (Xu et al, 2022;Mladenović et al, 2023a;Pratama et al, 2023).…”

Dense and Uniform Integration of Cu-BDC Particles on a Nafion Film for a High-Performance Hydrogen-Producing Device

“…In response to the pressing need to address the energy crisis and the severity of environmental issues, researchers have been actively engaged in the investigation of clean and sustainable energy resources that can substitute conventional fossil fuels. , Owing to its zero carbon emissions and considerable energy density, hydrogen is universally acknowledged as a promising new energy source poised to accommodate the escalating demand for energy . Several existing methods for hydrogen production, such as coal gasification, steam reforming, and water electrolysis, have been employed .…”