Construction of Highly Active Pd–Ti3+ Sites in Defective Pd/TiO2 Catalysts for Efficient Hydrogenation of Styrene–Butadiene–Styrene DOI
Shidong Wang,

Bingqing Ge,

Zongxuan Yang

et al.

ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(3), P. 1432 - 1442

Published: Jan. 12, 2024

Defect-rich Pd/TiO2 catalysts are intensively adopted in heterogeneous hydrogenation reactions; however, the complexity of defect structure makes it difficult to precisely identify which Pd-defect combination dominates catalytic activity. Herein, defective TiO2 nanoflakes with tunable ratios Vo Ti3+ defects were synthesized and used construct Pd–Vo Pd–Ti3+ active sites after loading Pd investigate role regulating structural properties catalysts. Combining experimental results theoretical calculations, we reveal that both act as electron donors for induce strong metal–support interaction. When compared defect, behaves more significantly donates electrons, causing species on be better dispersed rich electrons. These unique features endow centers enhanced adsorption–activation ability toward C═C H2 well reduced energy barrier rate-limiting step, thus improving intrinsic The site manifests a high turnover frequency 348 h–1 degree 97% styrene–butadiene–styrene, outperforms (254 78%) nanoparticle (217 53%). This work provides deep insight into metal sites, can guide development high-performance versatile applications.

Language: Английский

Robust Fluorine-Functionalized {Ln5}-Organic Frameworks for Excellent Catalytic Performance on Cycloaddition of CO2 with Epoxides and Knoevenagel Condensation DOI
Chong Li, Hongxiao Lv, Kun Yang

et al.

ACS Applied Materials & Interfaces, Journal Year: 2023, Volume and Issue: 15(29), P. 35052 - 35061

Published: July 12, 2023

Lanthanide-organic frameworks (LnOFs) are a class of promising catalysts on large number organic reactions because the higher coordination Ln3+ ions, inspired by which exploratory preparation cluster-based LnOFs was carried out us. Herein, exquisite combination spindly [Ln5(μ3-OH)6(CO2)6(H2O)6] clusters (abbreviated as {Ln5}) and fluorine-functionalized tetratopic ligand 2',3'-difluoro-[p-terphenyl]-3,3″,5,5″-tetracarboxylic acid (F-H4PTTA) engendered two highly robust isomorphic nanoporous {[Ln5(FPTTA)2(μ3-OH)6(H2O)6](NO3)}n (NUC-61, Ln = Ho Dy). NUC-61 compounds rarely reported {Ln5}-based 3D with nano-caged voids (19 Å × 17 Å), shaped twelve [Ln5(μ3-OH)6(COO)8] eight completely deprotonated F-PTTA4- ligands. Activated NUC-61a characterized plentiful coexisted Lewis acid-base sites open LnIII sites, capped μ3-OH, -F. Judged ideal adsorbed solution theory (IAST), activated NUC-61Ho-a had high CO2/CH4 adsorptive selectivity value 12.7 (CO2/CH4 50/50) 9.1 5/95) at 298 K, could lead to high-purity CH4 (≥99.9996%). Furthermore, catalytic experiments exhibited that NUC-61Ho-a, representative, efficiently catalyze cycloaddition CO2 epoxides well Knoevenagel condensation aldehydes malononitrile. This work proves skeletons chemical stability, heterogeneity, recyclability an excellent bifunctional catalyst for some reactions.

Language: Английский

Citations

43
Nanocatalysts for modulating antitumor immunity: fabrication, mechanisms and applications DOI
Xianbo Wu, Yuqing Li, Mei Wen

et al.

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: 53(5), P. 2643 - 2692

Published: Jan. 1, 2024

This review discusses the structures and engineering strategies of nanocatalysts, highlighting their underlying mechanisms applications in cancer immunotherapy.

Language: Английский

Citations

40
Unlocking Efficiency: Minimizing Energy Loss in Electrocatalysts for Water Splitting DOI Creative Commons
Wenxian Li, Yang Liu,

Ashraful Azam

et al.

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

Published: June 25, 2024

Abstract Catalysts play a crucial role in water electrolysis by reducing the energy barriers for hydrogen and oxygen evolution reactions (HER OER). Research aims to enhance intrinsic activities of potential catalysts through material selection, microstructure design, various engineering techniques. However, consumption has often been overlooked due intricate interplay among catalyst microstructure, dimensionality, catalyst–electrolyte–gas dynamics, surface chemistry, electron transport within electrodes, transfer electrode components. Efficient development high‐current‐density applications is essential meet increasing demand green hydrogen. This involves transforming with high into electrodes capable sustaining current densities. review focuses on improvement strategies mass exchange, charge transfer, resistance decrease consumption. It bridge gap between laboratory‐developed, highly efficient industrial regarding structural catalyst‐electrode interplay, outlining roadmap hierarchically structured electrode‐based minimizing loss electrocatalysts splitting.

Language: Английский

Citations

33
Recent Advances in Pristine Iron Triad Metal–Organic Framework Cathodes for Alkali Metal‐Ion Batteries DOI
Chao Li,

Yuquan Yuan,

Min Yue

et al.

Small, Journal Year: 2024, Volume and Issue: 20(23)

Published: Jan. 4, 2024

Abstract Pristine iron triad metal–organic frameworks (MOFs), i.e., Fe‐MOFs, Co‐MOFs, Ni‐MOFs, and heterometallic MOFs, are utilized as versatile promising cathodes for alkali metal‐ion batteries, owing to their distinctive structure characteristics, including modifiable designable composition, multi‐electron redox‐active sites, exceptional porosity, stable construction facilitating rapid ion diffusion. Notably, pristine MOFs have recently achieved significant milestones in electrochemical energy storage due properties. Here, the recent advances batteries summarized. The redox reaction mechanisms essential strategies boost behaviors associated devices also explored. Furthermore, insights into future prospects related lithium‐ion, sodium‐ion, potassium‐ion delivered.

Language: Английский

Citations

31
Construction of Highly Active Pd–Ti3+ Sites in Defective Pd/TiO2 Catalysts for Efficient Hydrogenation of Styrene–Butadiene–Styrene DOI
Shidong Wang,

Bingqing Ge,

Zongxuan Yang

et al.

ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(3), P. 1432 - 1442

Published: Jan. 12, 2024

Defect-rich Pd/TiO2 catalysts are intensively adopted in heterogeneous hydrogenation reactions; however, the complexity of defect structure makes it difficult to precisely identify which Pd-defect combination dominates catalytic activity. Herein, defective TiO2 nanoflakes with tunable ratios Vo Ti3+ defects were synthesized and used construct Pd–Vo Pd–Ti3+ active sites after loading Pd investigate role regulating structural properties catalysts. Combining experimental results theoretical calculations, we reveal that both act as electron donors for induce strong metal–support interaction. When compared defect, behaves more significantly donates electrons, causing species on be better dispersed rich electrons. These unique features endow centers enhanced adsorption–activation ability toward C═C H2 well reduced energy barrier rate-limiting step, thus improving intrinsic The site manifests a high turnover frequency 348 h–1 degree 97% styrene–butadiene–styrene, outperforms (254 78%) nanoparticle (217 53%). This work provides deep insight into metal sites, can guide development high-performance versatile applications.

Language: Английский

Citations

28