Design of efficient electrocatalysts for hydrogen evolution reaction based on 2D MXenes

Wei, Yi; Soomro, Razium Ali; Xie, Xiuqiang; Xu, Bin

doi:10.1016/j.jechem.2020.06.069

Cited by 116 publications

(57 citation statements)

References 97 publications

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“…In addition to their electrical conductivity being as robust as that of graphene, MXenes also have excellent hydrophilicity, comparable to that of graphene oxide. 174 Various hydrophilic functional groups, such as OH, O and F, were introduced on the MXene surface during the etching process. This surface termination provides hydrophilic features on the MXene surface with contact angles of 21.5 to 35 .…”

Section: Hydrophilicitymentioning

confidence: 99%

“…Specifically, MXenes with C as the X element have a more significant lattice constant and better stability than MXenes with N as the X element. 174 Surface termination plays a significant role in the dynamic stability of MXenes. It was discovered that O-terminated MXenes were the most stable, while OH-terminated groups were prone to decompose and F-terminated groups tended to desorb or be replaced by other elements due to their weak chemical bonding.…”

Section: Chemical Stabilitymentioning

confidence: 99%

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A comprehensive review of MXenes as catalyst supports for the oxygen reduction reaction in fuel cells

et al. 2021

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The oxygen reduction reaction (ORR) that occurs in the cathode of fuel cells is a major issue in proton exchange membrane fuel cells (PEMFCs) due to their sluggish kinetics. Exploring suitable materials for use as cathode catalysts can be challenging because the materials should be chemically active yet must be stable in an extremely corrosive environment in fuel cells. Since the successful introduction of graphene, 2-dimensional (2D) materials have received extensive research interest regarding their use as support materials for cathode catalysts due to their large surface area for catalyst dispersion. Recently, research on 2D MXene-based catalyst supports has started to increase. Excellent electronic properties, electrical conductivity, hydrophilicity and chemical and thermal stability are the key properties of potential MXenes used as catalyst supports. Therefore, in this review, the properties and performance of 2D MXene-based catalyst supports in the ORR are comprehensively discussed. This finding provides the groundwork for the exploration of MXenes in electrocatalysis, especially in the ORR. Challenges and future research directions are also discussed in this review.

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Section: Hydrophilicitymentioning

confidence: 99%

Section: Chemical Stabilitymentioning

confidence: 99%

A comprehensive review of MXenes as catalyst supports for the oxygen reduction reaction in fuel cells

et al. 2021

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“…Unfortunately, the state‐of‐the‐art Pt‐based noble metal catalysts with high catalytic activity are restricted by their limited reserves, high costs and unsatisfactory durability [5–8] . Therefore, it is a research hotspot to explore an accessible and adequate non‐noble‐metal‐based electrocatalyst for HER to reduce the energy barrier [9] . In alkaline environment, the well‐accepted HER process undergoes two different mechanisms: Volmer‐Tafel step and Volmer‐Heyrovsky step, in which Volmer dissociation of water molecule occurs to form active *H intermediates followed by different rate‐limiting steps to generate H 2 molecules [10] .…”

Section: Methodsmentioning

confidence: 99%

Interface Engineering in CoP/CePO₄ Derived from a Prussian Blue Analogue as a Highly Efficient Electrocatalyst for Alkaline Hydrogen Evolution Reaction

et al. 2021

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In this work, engineering a heterostructural interface into a CoP/CePO4 hybrid has been achieved from a pre‐designed Co‐PBA/CePO4 precursor. The new CePO4 engaged interface can regulate the electronic structure of the active CoP as well as enhance the intrinsic activity. As a result, the porous CoP/CePO4 material shows a superior electrocatalytic performance toward hydrogen evolution reaction (HER) with a lower overpotential of 162 mV to reach a current density of 10 mA cm−2 and a low Tafel slope of 48.7 mV dec−1. This research could widen the way of engineering heterostructural interfaces with a facile method and promote the exploration of MOF‐derived heterostructural electrocatalysts.

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“…It is important to notice that acidic solutions are not opt to remove the ‘A’ phase (Al, Sn) from MAX for 2D layered TMNs due to its less cohesive energy, which leads to make them unstable when it dissolved in HF solution and failed completely. Hence, the synthesis of 2D layered nitride based MXenes (2D TMNs) are highly complex and cost-effective [ 141 , 142 ]. Owing to these factors, only a few 2D layered TMNs have been reported.…”

Section: Metal Carbides For Lobsmentioning

confidence: 99%

Recent Advances in Nanostructured Transition Metal Carbide- and Nitride-Based Cathode Electrocatalysts for Li–O2 Batteries (LOBs): A Brief Review

Karuppasamy

Prasanna²,

Jothi

et al. 2020

Nanomaterials

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A large volume of research on lithium–oxygen (Li–O2) batteries (LOBs) has been conducted in the recent decades, inspired by their high energy density and power density. However, these future generation energy-storage devices are still subject to technical limitations, including a squat round-trip efficiency and a deprived rate-capability, due to the slow-moving electrochemical kinetics of both the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) over the surface of the cathode catalyst. Because the electrochemistry of LOBs is rather complex, only a limited range of cathode catalysts has been employed in the past. To understand the catalytic mechanisms involved and improve overall cell performance, the development of new cathode electrocatalysts with enhanced round-trip efficiency is extremely important. In this context, transition metal carbides and nitrides (TMCs and TMNs, respectively) have been explored as potential catalysts to overcome the slow kinetics of electrochemical reactions. To provide an accessible and up-to-date summary for the research community, the present paper reviews the recent advancements of TMCs and TMNs and its applications as active electrocatalysts for LOBs. In particular, significant studies on the rational design of catalysts and the properties of TMC/TMN in LOBs are discussed, and the prospects and challenges facing the continued development of TMC/TMN electrocatalysts and strategies for attaining higher OER/ORR activity in LOBs are presented.

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Design of efficient electrocatalysts for hydrogen evolution reaction based on 2D MXenes

Cited by 116 publications

References 97 publications

A comprehensive review of MXenes as catalyst supports for the oxygen reduction reaction in fuel cells

A comprehensive review of MXenes as catalyst supports for the oxygen reduction reaction in fuel cells

Interface Engineering in CoP/CePO₄ Derived from a Prussian Blue Analogue as a Highly Efficient Electrocatalyst for Alkaline Hydrogen Evolution Reaction

Recent Advances in Nanostructured Transition Metal Carbide- and Nitride-Based Cathode Electrocatalysts for Li–O2 Batteries (LOBs): A Brief Review

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Design of efficient electrocatalysts for hydrogen evolution reaction based on 2D MXenes

Cited by 116 publications

References 97 publications

A comprehensive review of MXenes as catalyst supports for the oxygen reduction reaction in fuel cells

A comprehensive review of MXenes as catalyst supports for the oxygen reduction reaction in fuel cells

Interface Engineering in CoP/CePO4 Derived from a Prussian Blue Analogue as a Highly Efficient Electrocatalyst for Alkaline Hydrogen Evolution Reaction

Recent Advances in Nanostructured Transition Metal Carbide- and Nitride-Based Cathode Electrocatalysts for Li–O2 Batteries (LOBs): A Brief Review

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Interface Engineering in CoP/CePO₄ Derived from a Prussian Blue Analogue as a Highly Efficient Electrocatalyst for Alkaline Hydrogen Evolution Reaction