High-entropy materials for catalysis: A new frontier

Sun, Yifan; Dai, Sheng

doi:10.1126/sciadv.abg1600

Cited by 445 publications

(377 citation statements)

References 153 publications

(207 reference statements)

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“…[10] Layered double (oxy)(hydr) oxides such as FeNi(OH) x , FeNiO x , or FeNiOOH also performed better than their single counterpart. [100][101][102] Recently, multicomponent/heterogeneous catalysts [23,38,103] or highentropy alloys [104,105] are reported to be more active and stable than single-component catalysts. However, modulating the composition, spatial distribution, and fraction of each constituent in the catalysts system requires a costly, multistep, and time-consuming synthesis procedure.…”

Section: Compositions and Complexitymentioning

confidence: 99%

From Stochastic Self‐Assembly of Nanoparticles to Nanostructured (Photo)Electrocatalysts for Renewable Power‐to‐X Applications via Scalable Flame Synthesis

Trần‐Phú

Daiyan

et al. 2021

Adv Funct Materials

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Environmentally friendly routes from "Power-to-X" (P2X) technologies to sustainably harvest and store renewable energy with net-zero CO 2 emission are imperative. The concept of P2X relies on (photo)electrolysis of earthabundant molecules into value-added products. For practical utilization, engineering robust, active, albeit inexpensive (photo)electrocatalysts via industrially compatible technologies is indeed crucial. In this context, flame spray pyrolysis (FSP) stands as an emerging approach for one-step synthesis of ready-to-use (photo)electrocatalysts with production rates of Kg h -1 in lab-scales. While features of FSP to engineer nanomaterials have been summarised, there is a need for more critical discussions on key factors, modulating properties of flame-made catalysts. Therefore, this review article will first provide an overview about the concept of the P2X and catalyst development strategies. Unique characteristic of flame-synthesized nano-catalysts including compositions, fractal morphologies, defects, and active sites will be then critically discussed. Furthermore, a potential of FSP as an electrodeassembly technique for one-step preparation of catalysts on gas diffusion layers for industry-relevant electrolyser testing will be presented. Finally, perspectives on challenges and opportunities of FSP for renewable energies will be raised. This will provide insights into the versatility and commercial viability of the FSP route for engineering novel nanostructured catalysts for renewable energy applications.

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Section: Compositions and Complexitymentioning

confidence: 99%

From Stochastic Self‐Assembly of Nanoparticles to Nanostructured (Photo)Electrocatalysts for Renewable Power‐to‐X Applications via Scalable Flame Synthesis

Trần‐Phú

Daiyan

et al. 2021

Adv Funct Materials

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“…The insights provided here are also useful to elucidate metal–support interactions in complex systems, such as high‐entropy materials and single‐atom catalysts. [ 2 , 50 ]…”

Section: Discussionmentioning

confidence: 99%

Manipulating Copper Dispersion on Ceria for Enhanced Catalysis: A Nanocrystal‐Based Atom‐Trapping Strategy

et al. 2022

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Due to tunable redox properties and cost-effectiveness, copper-ceria (Cu-CeO 2 ) materials have been investigated for a wide scope of catalytic reactions. However, accurately identifying and rationally tuning the local structures in Cu-CeO 2 have remained challenging, especially for nanomaterials with inherent structural complexities involving surfaces, interfaces, and defects. Here, a nanocrystal-based atom-trapping strategy to access atomically precise Cu-CeO 2 nanostructures for enhanced catalysis is reported. Driven by the interfacial interactions between the presynthesized Cu and CeO 2 nanocrystals, Cu atoms migrate and redisperse onto the CeO 2 surface via a solid-solid route. This interfacial restructuring behavior facilitates tuning of the copper dispersion and the associated creation of surface oxygen defects on CeO 2 , which gives rise to enhanced activities and stabilities catalyzing water-gas shift reaction. Combining soft and solid-state chemistry of colloidal nanocrystals provide a well-defined platform to understand, elucidate, and harness metal-support interactions. The dynamic behavior of the supported metal species can be further exploited to realize exquisite control and rational design of multicomponent nanocatalysts.

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“…Template-induced synthesis of mixed MNs is an effective method for generating tunable porous features that are crucial for their catalytic activity [ 152–154 ]. Fischer et al developed a reactive hard templating approach for the fabrication of aluminium gallium nitride (AlGaN) and titanium vanadium nitride (TiVN) particles with diameters smaller than 10 nm, as demonstrated in Figure 7d [ 155 ].…”

Section: Synthesis Of Mixed Mnsmentioning

confidence: 99%

Metal nitride-based nanostructures for electrochemical and photocatalytic hydrogen production

Gujral

Singh

Baskar

et al. 2022

Science and Technology of Advanced Materials

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The over-dependence on fossil fuels is one of the critical issues to be addressed for combating greenhouse gas emissions. Hydrogen, one of the promising alternatives to fossil fuels, is renewable, carbon-free, and non-polluting gas. The complete utilization of hydrogen in every sector ranging from small to large scale could hugely benefit in mitigating climate change. One of the key aspects of the hydrogen sector is its production via cost-effective and safe ways. Electrolysis and photocatalysis are well-known processes for hydrogen production and their efficiency relies on electrocatalysts, which are generally noble metals. The usage of noble metals as catalysts makes these processes costly and their scarcity is also a limiting factor. Metal nitrides and their porous counterparts have drawn considerable attention from researchers due to their good promise for hydrogen production. Their properties such as active metal centres, nitrogen functionalities, and porous features such as surface area, pore-volume, and tunable pore size could play an important role in electrochemical and photocatalytic hydrogen production. This review focuses on the recent developments in metal nitrides from their synthesis methods point of view. Much attention is given to the emergence of new synthesis techniques, methods, and processes of synthesizing the metal nitride nanostructures. The applications of electrochemical and photocatalytic hydrogen production are summarized. Overall, this review will provide useful information to researchers working in the field of metal nitrides and their application for hydrogen production.

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High-entropy materials for catalysis: A new frontier

Cited by 445 publications

References 153 publications

From Stochastic Self‐Assembly of Nanoparticles to Nanostructured (Photo)Electrocatalysts for Renewable Power‐to‐X Applications via Scalable Flame Synthesis

From Stochastic Self‐Assembly of Nanoparticles to Nanostructured (Photo)Electrocatalysts for Renewable Power‐to‐X Applications via Scalable Flame Synthesis

Manipulating Copper Dispersion on Ceria for Enhanced Catalysis: A Nanocrystal‐Based Atom‐Trapping Strategy

Metal nitride-based nanostructures for electrochemical and photocatalytic hydrogen production

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