Single-Atom Catalysts Based on the Metal–Oxide Interaction

Chemical Reviews, Journal Year: 2020, Volume and Issue: 120(21), P. 11986 - 12043

Published: Oct. 28, 2020

Metal atoms dispersed on the oxide supports constitute a large category of single-atom catalysts. In this review, supported catalysts are discussed about their synthetic procedures, characterizations, and reaction mechanism in thermocatalysis, such as water-gas shift reaction, selective oxidation/hydrogenation, coupling reactions. Some typical materials, including ferric oxide, cerium titanium dioxide, aluminum so on, intentionally mentioned for unique roles anchoring metal taking part catalytic The interactions between summarized to give picture how stabilize atomic centers, rationally tune geometric structures electronic states single atoms. Furthermore, several directions fabricating with improved performance proposed basis state-of-the-art understanding metal-oxide interactions.

Language: Английский

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Electronic Metal–Support Interaction of Single‐Atom Catalysts and Applications in Electrocatalysis

Advanced Materials, Journal Year: 2020, Volume and Issue: 32(49)

Published: Oct. 30, 2020

Abstract The electronic metal–support interaction (EMSI), which acts as a bridge between theoretical study and the design of heterogenous catalysts, has attracted much attention. Utilizing metal support is one most essential strategies to enhance electrocatalytic efficiency due structural synergetic promotion. To date, ideal model for realizing EMSI, many types single‐atom catalysts (SACs) have been developed. understanding on SACs also pushed higher level. However, systematic theories operando experiments are seldom reported, will be necessary put forward carried out, respectively. Herein, types, characterization, mechanism, applications EMSI comprehensively summarized discussed. In addition basic information above, challenges, opportunities, future development proposed present an overall view reference later research.

Language: Английский

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Active Site Engineering in Porous Electrocatalysts

Advanced Materials, Journal Year: 2020, Volume and Issue: 32(44)

Published: July 14, 2020

Abstract Electrocatalysis is at the center of many sustainable energy conversion technologies that are being developed to reduce dependence on fossil fuels. The past decade has witnessed significant progresses in exploitation advanced electrocatalysts for diverse electrochemical reactions involved electrolyzers and fuel cells, such as hydrogen evolution reaction (HER), oxygen reduction (ORR), CO 2 (CO RR), nitrogen (NRR), (OER). Herein, recent research advances made porous these five important reviewed. In discussions, an attempt highlight advantages multiobjective optimization surface active sites including not only their density accessibility but also intrinsic activity. First, current knowledge about electrocatalytic briefly summarized. Then, mechanisms above‐mentioned (HER, ORR, RR, NRR, OER), challenges faced by reactions, efforts meet using examined. Finally, future directions synthetic strategies leading materials, insights into sites, standardized tests performance requirements discussed.

Language: Английский

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The Progress and Outlook of Metal Single-Atom-Site Catalysis

Journal of the American Chemical Society, Journal Year: 2022, Volume and Issue: 144(40), P. 18155 - 18174

Published: Sept. 29, 2022

Single-atom-site catalysts (SASCs) featuring maximized atom utilization and isolated active sites have progressed tremendously in recent years as a highly prosperous branch of catalysis research. Varieties SASCs been developed that show excellent performance many catalytic applications. The major goal SASC research is to establish feasible synthetic strategies for the preparation high-performance catalysts, achieve an in-depth understanding active-site structures mechanisms, develop practical with industrial value. This Perspective describes up-to-date development related such dual-atom-site (DASCs) nano-single-atom-site (NSASCs), analyzes current challenges encountered by these applications, proposes their possible future path.

Language: Английский

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RuO2 electronic structure and lattice strain dual engineering for enhanced acidic oxygen evolution reaction performance

Nature Communications, Journal Year: 2022, Volume and Issue: 13(1)

Published: July 1, 2022

Developing highly active and durable electrocatalysts for acidic oxygen evolution reaction remains a great challenge due to the sluggish kinetics of four-electron transfer severe catalyst dissolution. Here we report an electrochemical lithium intercalation method improve both activity stability RuO2 reaction. The intercalates into lattice interstices RuO2, donates electrons distorts local structure. Therefore, Ru valence state is lowered with formation stable Li-O-Ru structure, Ru-O covalency weakened, which suppresses dissolution Ru, resulting in greatly enhanced durability. Meanwhile, inherent strain results surface structural distortion LixRuO2 activates dangling O atom near site as proton acceptor, stabilizes OOH* dramatically enhances activity. This work provides effective strategy develop efficient towards water splitting.

Language: Английский

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Confined Ir single sites with triggered lattice oxygen redox: Toward boosted and sustained water oxidation catalysis

Joule, Journal Year: 2021, Volume and Issue: 5(8), P. 2164 - 2176

Published: Aug. 1, 2021

Language: Английский

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Tuning the Selective Adsorption Site of Biomass on Co₃O₄ by Ir Single Atoms for Electrosynthesis

Advanced Materials, Journal Year: 2021, Volume and Issue: 33(8)

Published: Jan. 20, 2021

Abstract The electrosynthesis from 5‐hydroxymethylfurfural (HMF) is considered a green strategy to achieve biomass‐derived high‐value chemicals. As the molecular structure of HMF relatively complicated, understanding adsorption/catalysis behavior on electrocatalysts vital for biomass‐based electrosynthesis. electrocatalysis can be modulated by tuning adsorption energy reactive molecules. In this work, spinel oxide, Co 3 O 4 discovered. Correspondingly, successfully tuned decorating with single‐atom Ir. It observed that compared bare , single‐atom‐Ir‐loaded (Ir‐Co ) enhance CC groups HMF. synergetic overall conversion electrocatalysts. With adsorption, as‐designed Ir‐Co exhibits record performance (with an onset potential 1.15 V RHE

Language: Английский

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Electrocatalysis of Single-Atom Sites: Impacts of Atomic Coordination

ACS Catalysis, Journal Year: 2020, Volume and Issue: 10(14), P. 7584 - 7618

Published: June 11, 2020

Single metal atoms embedded within select supporting matrices have shown great potential in the development of high-efficiency, low-cost electrocatalysts because maximal atom utilization and mass activity. As single are stabilized by coordination bonds with substrate, strong metal–support interactions can be exploited for ready manipulation electrocatalytic activity selectivity toward target reactions. However, most single-atom catalysts (SACs) prepared pyrolysis contain a wide range structures. Resolving atomic configurations moieties represents critical first step establishment an unambiguous correlation between SAC structure In this Review, we summarize recent progress studies electrocatalysts, focus on impacts sites activities series reactions that important various electrochemical energy technologies, such as hydrogen evolution reaction, oxygen reduction nitrogen CO2 so on. The survey entails SACs, from noble metals (e.g., Pt, Pd, Ru, Ir, Au, etc.) to non-noble Fe, Co, Ni, Cu, etc.), supported variety substrate materials pristine doped carbon, metal, oxide, sulfide, etc.). Finally, Review concludes perspective highlighting promises challenges further SACs context chemistry.

Language: Английский

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Atomic heterointerface engineering overcomes the activity limitation of electrocatalysts and promises highly-efficient alkaline water splitting

Energy & Environmental Science, Journal Year: 2021, Volume and Issue: 14(10), P. 5228 - 5259

Published: Jan. 1, 2021

This review summarizes the recent progress of atomic heterointerface engineering to overcome activity limitation electrocatalysts for water splitting and elaborates its electron effect ensemble effect, etc.

Language: Английский

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Perfecting electrocatalystsviaimperfections: towards the large-scale deployment of water electrolysis technology

Energy & Environmental Science, Journal Year: 2021, Volume and Issue: 14(4), P. 1722 - 1770

Published: Jan. 1, 2021

A tuned electronic structure favors the electrocatalytic water splitting reactionviaaccelerating reaction kinetics, changing rate-determining step, and optimizing adsorption energy for intermediates; this is achievedviaintentionally incorporating imperfections into crystal lattices of electrocatalysts.

Language: Английский

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