Efficient piezocatalytic H2O2 production of atomic-level thickness Bi4Ti3O12 nanosheets with surface oxygen vacancy

Chemical Engineering Journal, Journal Year: 2021, Volume and Issue: 431, P. 133930 - 133930

Published: Dec. 2, 2021

Language: Английский

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Continuous carbon capture in an electrochemical solid-electrolyte reactor

Nature, Journal Year: 2023, Volume and Issue: 618(7967), P. 959 - 966

Published: June 28, 2023

Language: Английский

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Edge‐hosted Atomic Co−N₄Sites on Hierarchical Porous Carbon for Highly Selective Two‐electron Oxygen Reduction Reaction

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(51)

Published: Oct. 25, 2022

Not only high efficiency but also selectivity of the electrocatalysts is crucial for high-performance, low-cost, and sustainable energy storage applications. Herein, we systematically investigate edge effect carbon-supported single-atom catalysts (SACs) on oxygen reduction reaction (ORR) pathways (two-electron (2 e- ) or four-electron (4 )) conclude that 2 -ORR proceeding over edge-hosted atomic Co-N4 sites more favorable than basal-plane-hosted ones. As such, have successfully synthesized tuned Co-SACs with different edge-to-bulk ratios. The as-prepared edge-rich Co-N/HPC catalyst exhibits excellent performance a remarkable ≈95 % in wide potential range. Furthermore, find functional groups could saturate graphitic carbon edges under ORR operation further promote electrocatalytic performance. These findings structure-property relationship SACs offer promising direction large-scale low-cost electrochemical H2 O2 production via -ORR.

Language: Английский

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Defects controlling, elements doping, and crystallinity improving triple-strategy modified carbon nitride for efficient photocatalytic diclofenac degradation and H2O2 production

Applied Catalysis B Environment and Energy, Journal Year: 2022, Volume and Issue: 321, P. 121941 - 121941

Published: Sept. 6, 2022

Language: Английский

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NBOH Site‐Activated Graphene Quantum Dots for Boosting Electrochemical Hydrogen Peroxide Production

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(17)

Published: Feb. 14, 2023

Carbon materials are considered promising 2/4 e- oxygen reduction reaction (ORR) electrocatalysts for synthesizing H2 O2 /H2 O via regulating heteroatom dopants and functionalization. Here, various doped functionalized graphene quantum dots (GQDs) designed to reveal the crucial active sites of carbon ORR produce . Density functional theory (DFT) calculations predict that edge structure involving N, B dopant pairs further OH functionalization (NBOH) is an center 2e- ORR. To verify above predication, GQDs with enriched density NBOH (NBO-GQDs) synthesized by hydrothermal NH2 edge-functionalized H3 BO3 forming six-member heterocycle containing structure. When dispersed on conductive substrates, NBO-GQDs show selectivity over 90% at 0.7 -0.8 V versus reversible hydrogen electrode in alkaline solution a rotating ring-disk setup. The retains initial value after 12 h stability test. In flow cell setup, production rate up 709 mmol gcatalyst-1 h-1 , superior most reported carbon- metal-based electrocatalysts. This work provides molecular insight into design formulation highly efficient carbon-based catalysts sustainable production.

Language: Английский

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Stimuli-Responsive Polymer-Based Nanosystems for Cancer Theranostics

ACS Nano, Journal Year: 2023, Volume and Issue: 17(23), P. 23223 - 23261

Published: Dec. 2, 2023

Stimuli-responsive polymers can respond to internal stimuli, such as reactive oxygen species (ROS), glutathione (GSH), and pH, biological enzymes, external lasers ultrasound, etc., by changing their hydrophobicity/hydrophilicity, degradability, ionizability, thus have been widely used in biomedical applications. Due the characteristics of tumor microenvironment (TME), stimuli-responsive that cater specifically TME extensively prepare smart nanovehicles for targeted delivery therapeutic diagnostic agents tissues. Compared conventional drug nanosystems, TME-responsive nanosystems many advantages, high sensitivity, broad applicability among different tumors, functional versatility, improved biosafety. In recent years, a great deal research has devoted engineering efficient polymeric significant improvement made both cancer diagnosis therapy. this review, we summarize some advances involving use polymer nanocarriers delivery, imaging, therapy, theranostics. Various chemical stimuli will be described context nanosystems. Accordingly, groups responsible responsiveness strategies incorporate these into discussed detail. With on topic expending at fast pace, innovative concepts, sequential cascade release, NIR-II multifunctional formulations, emerged popular enhanced performance, which also included here with up-to-date illustrations. We hope review offer valuable insights selection optimization help accelerate future applications treatment.

Language: Английский

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Versatile Photoelectrocatalysis Strategy Raising Up the Green Production of Hydrogen Peroxide

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(14)

Published: March 1, 2023

Abstract H 2 O plays an irreplaceable role in many aspects of human society, such as paper bleaching, medical disinfection, wastewater treatment, organic synthesis, hydrometallurgy and the electronic industry. However, unsustainability current industrial production process traditional anthraquinone has a serious conflict with green sustainable development. The photo/electrocatalytic from renewable energy advantages being more economical, low‐carbon green, line requirements economy. These catalytic methods have played demonstrative development small molecules, contributing to fundamental understanding general catalysis providing scientific perspective for future new cycles. In this review, authors aim integrate reaction mechanism photocatalytic electrocatalytic production, summarize application recent years, assess modern technologies promoted research, including flux equipment coproduction, etc. This review intends provide clear logic profile directions calls researchers insights into field.

Language: Английский

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Photoredox‐Promoted Co‐Production of Dihydroisoquinoline and H₂O₂ over Defective Zn₃In₂S₆

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(10)

Published: Jan. 5, 2023

One of the most sustainable and promising approaches for hydrogen peroxide (H2 O2 ) production in a low-cost environment-friendly way is photosynthesis, which, however, suffers from poor carrier utilization low H2 productivity. The addition proton donors such as isopropanol or ethanol can increase production, unfortunately, will inevitably elevate entire cost while wasting oxidizing power holes (h+ ). Herein, tetrahydroisoquinolines (THIQs) employed distinctive donor thermodynamically feasible selective semi-dehydrogenation reaction to highly valuable dihydroisoquinolines (DHIQs), meanwhile, couple with promote generation one photoredox under photocatalysis by dual-functional Zn3 In2 S6 photocatalyst. Surprisingly, suitably defective offers an excellent near-stoichiometric co-production performance DHIQs at unprecedentedly high rates 66.4 62.1 mmol h-1 g-1 visible light (λ ≥ 400 nm), respectively, which outperforms all previously available reports even though sacrificial agents were those reports. Additionally, photocatalytic redox mechanism demonstrates that be generated through multiple pathways, highlighting synergistic effect among ROS (·O2- 1 ), h+ donor, has been ignored previous studies.

Language: Английский

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Atomistic Understanding of Two-dimensional Electrocatalysts from First Principles

Chemical Reviews, Journal Year: 2022, Volume and Issue: 122(12), P. 10675 - 10709

Published: May 13, 2022

Two-dimensional electrocatalysts have attracted great interest in recent years for renewable energy applications. However, the atomistic mechanisms are still under debate. Here we review first-principles studies of common 2D electrocatalysts. We first introduce models studying heterogeneous electrocatalysis then discuss with a focus on N doped graphene, single metal atoms and transition dichalcogenides. The reactions include hydrogen evolution, oxygen reduction, carbon dioxide reduction. Finally, challenges future directions to improve fundamental understanding electrocatalyst at atomic level.

Language: Английский

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Carbon-based catalyst supports for oxygen reduction in proton-exchange membrane fuel cells

Trends in Chemistry, Journal Year: 2022, Volume and Issue: 4(10), P. 886 - 906

Published: Aug. 26, 2022

Language: Английский

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