Designing Ni-in intermetallic alloy compounds for high activity and selectivity in low-temperature RWGS reaction

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 160529 - 160529

Published: Feb. 1, 2025

Language: Английский

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Stabilizing Undercoordinated Zn Active Sites through Confinement in CeO₂ Nanotubes for Efficient Electrochemical CO₂ Reduction

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 63(2)

Published: Dec. 8, 2023

Abstract Zn‐based catalysts hold great potential to replace the noble metal‐based ones for CO 2 reduction reaction (CO RR). Undercoordinated Zn (Zn δ+ ) sites may serve as active enhanced production by optimizing binding energy of *COOH intermediates. However, there is relatively less exploration into dynamic evolution and stability during process. Herein, we present ZnO, /ZnO varying applied potential. Theoretical studies reveal that could suppress HER HCOOH induce generation. And presents highest selectivity (FE 70.9 % at −1.48 V vs. RHE) compared ZnO. Furthermore, propose a CeO nanotube with confinement effect Ce 3+ /Ce 4+ redox stabilize species. The hollow core–shell structure /ZnO/CeO catalyst enables extremely expose electrochemically area while maintaining long‐time stability. Certainly, target affords FE 76.9 −1.08 RHE no significant decay in excess 18 h.

Language: Английский

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Photoinduced Precise Synthesis of Diatomic Ir₁Pd₁‐In₂O₃ for CO₂ Hydrogenation to Methanol via Angstrom‐Scale‐Distance Dependent Synergistic Catalysis

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(13)

Published: Feb. 10, 2024

Abstract The atomically dispersed metal catalysts with full atomic utilization and well‐defined site structure hold great promise for various catalytic reactions. However, the single metallic limits comprehensive reaction performance in most Here, we demonstrated a photo‐induced neighbour‐deposition strategy precise synthesis of diatomic Ir 1 Pd on In 2 O 3 applied CO hydrogenation to methanol. proximity synergism between sites enabled striking promotion both conversion (10.5 %) methanol selectivity (97 good stability 100 h run. It resulted record‐breaking space‐time yield (187.1 g MeOH −1 hour ). promotional effect mainly originated from stronger adsorption assistance H‐spillover site, thus leading lower energy barrier *HCOO pathway. was confirmed that this synergistic strongly depended dual‐site distance an angstrom scale, which attributed weaker *H spillover less electron transfer as Pd‐to‐Ir increased. average evaluated by our firstly proposed photoelectric model. Thus, study introduced pioneering precisely synthesize homonuclear/heteronuclear facilitating desired route via catalysis.

Language: Английский

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Tailored Design of Mesoporous Nanospheres with High Entropic Alloy Sites for Efficient Redox Electrocatalysis

Advanced Science, Journal Year: 2024, Volume and Issue: unknown

Published: July 19, 2024

High Entropy Alloys (HEAs) are a versatile material with unique properties, tailored for various applications. They enable pH-sensitive electrocatalytic transformations like hydrogen evolution reaction (HER) and oxidation reactions (HOR) in alkaline media. Mesoporous nanostructures high surface area preferred these electrochemical reactions, but designing mesoporous HEA sis challenging. To overcome this challenge, low-temperature triblock copolymer-assisted wet-chemical approach is developed to produce nanospheres composed of PtPdRuMoNi systems sufficient entropic mixing. Owing active sites inherent effect, features, increased accessibility, optimized promote strong HER/HOR performance medium. At 30 mV nominal overpotential, it exhibits mass activity ≈167 151 A g

Language: Английский

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Understanding and Tuning the Effects of H₂O on Catalytic CO and CO₂ Hydrogenation

Chemical Reviews, Journal Year: 2024, Volume and Issue: 124(21), P. 12006 - 12085

Published: Oct. 31, 2024

Catalytic COx (CO and CO2) hydrogenation to valued chemicals is one of the promising approaches address challenges in energy, environment, climate change. H2O an inevitable side product these reactions, where its existence effect are often ignored. In fact, significantly influences catalytic active centers, reaction mechanism, performance, preventing us from a definitive deep understanding on structure-performance relationship authentic catalysts. It necessary, although challenging, clarify provide practical strategies tune concentration distribution optimize influence. this review, we focus how induces structural evolution catalysts assists processes, as well efforts understand underlying mechanism. We summarize discuss some representative tuning for realizing rapid removal or local enrichment around catalysts, along with brief techno-economic analysis life cycle assessment. These fundamental understandings further extended reactions CO CO2 reduction under external field (light, electricity, plasma). also present suggestions prospects deciphering controlling applications.

Language: Английский

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Three-dimensional Ti3C2 structure design and in-situ growth of nano-TiO2 crystals to realize high performance lithium-sulfur battery

Journal of Material Science and Technology, Journal Year: 2024, Volume and Issue: 193, P. 187 - 198

Published: Jan. 6, 2024

Language: Английский

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Supported noble metal-based catalysts for thermal CO2 hydrogenation to CO

Molecular Catalysis, Journal Year: 2024, Volume and Issue: 560, P. 114133 - 114133

Published: April 12, 2024

Language: Английский

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Boosting CO2 Hydrogenation by Synergistic Incorporation of Pure Slica Silicalite‐1 Zeolite and CeO2 into Cu Catalysts

Angewandte Chemie International Edition, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 25, 2025

Chemical conversion of CO2 is providing an opportunity to mitigate the global warming induced by overconsumption fossil fuel. Cu has been regarded as one most powerful contenders in catalyzing conversion, yet precise manipulation its surface state and nearby chemical environment continues pose a formidable challenge. In this work, we report high-efficiency catalyst utilizing CeO2 pure silicon zeolite (S1) co-activate species. CO2-to-methanol (CTM) space-time yield methanol (STYMeOH) obtained CuCe/S1 catalysts reaches 87.23 g kgCu -1 h-1, which represents fivefold increase compared that Cu/CeO2 catalysts. The following mechanistic investigations reveal S1 serves pivotal stabilizer for small-sized particles, thereby significantly enhancing synergistic interaction between species CeO2. crafted interaface possesses abundant oxygen vacancies high content Cu+, adsorption inhibiting formation CO. Our discovery presents promising new direction upgrading performance enhancement CTM processes foreseeable future.

Language: Английский

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Construction of Core–shell Sb₂s₃@Cds Nanorod with Enhanced Heterointerface Interaction for Chromium‐Containing Wastewater Treatment

Small, Journal Year: 2023, Volume and Issue: 19(42)

Published: June 22, 2023

How to collaboratively reduce Cr(VI) and break Cr(III) complexes is a technical challenge solve chromium-containing wastewater (CCW) pollution. Solar photovoltaic (SPV) technology based on semiconductor materials potential strategy this issue. Sb2 S3 typical material with total visible-light harvesting capacity, but its large-sized structure highly aggravates disordered photoexciton migration, accelerating the recombination kinetics resulting low-efficient photon utilization. Herein, uniform mesoporous CdS shell in situ formed surface of nanorods (NRs) construct core-shell @CdS heterojunction high BET area excellent near-infrared light capacity via cationic displacement strategy, density functional theory thermodynamically explains breaking SbS bonds formation CdS according bond energy calculation. The SbSCd bonding interaction van der Waals force significantly enhance stability synergy /CdS heterointerface throughout entire NRs, promoting -to-CdS electron transfer due built-in electric field. Therefore, optimized catalyst achieves enhanced simulated sunlight-driven reduction (0.154 min-1 ) decomplexation complexed weakly acidic condition, effective CCW treatment under co-action photoexcited electrons active radicals. This study provides high-performance heterostructured for by SPV technology.

Language: Английский

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Catalytic CO₂ Conversion to C1 Chemicals over Single‐Atom Catalysts

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(42)

Published: Oct. 3, 2023

Abstract Carbon dioxide, as an abundant and nontoxic C1 resource, can be extensively applied to produce building blocks via direct indirect routes. On account of the stable electronic structure high activation energy CO 2 , most challenging problem conversion is rational design low‐cost efficient catalysts with attractive performance. Single‐atom (SACs) atomically dispersed metal atoms, strong metal–support interaction, tunable/unsaturated coordination environment offer a potential choice by achieving maximum atomic utilization lowering barrier. Furthermore, geometric SACs easily regulated tuning single which significantly affects their catalytic In this review, therefore, comprehensive review thermocatalytic chemicals over presented. Specifically, physiochemical properties, synthesis methods, characterization technologies are introduced. Thereafter, overview performance mechanism described during chemicals. Finally, main limitations current studies on summarized, simultaneouslyperspectives future proposed, in order provide guidance for decarbonizing industries cycling greenhouse gases.

Language: Английский

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