Improving the rigor and reproducibility of catalyst testing and evaluation in the laboratory

Journal of Catalysis, Journal Year: 2024, Volume and Issue: 431, P. 115408 - 115408

Published: March 1, 2024

Language: Английский

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Dynamic Redox Induced Localized Charge Accumulation Accelerating Proton Exchange Membrane Electrolysis

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 2, 2025

The sluggish anodic oxygen evolution reaction (OER) in proton exchange membrane (PEM) electrolysis necessitates applied bias to facilitate electron transfer as well bond cleavage and formation. Traditional electrocatalysis focuses on analyzing the effects of transfer, while role charge accumulation induced by overpotential has not been thoroughly investigated. To explore influence mechanism bias-driven accumulation, capacitive Mn is incorporated into IrO

Language: Английский

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Understanding the mechanism of propane dehydrogenation over coordinatively unsaturated Co-O acid-base pairs and the inhibition effect of trace oxygen

Journal of Catalysis, Journal Year: 2024, Volume and Issue: 433, P. 115472 - 115472

Published: March 31, 2024

Language: Английский

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Electron-driven self-recovery of PtGa bimetallic sub-nanoclusters for enhanced propane dehydrogenation stability

Journal of Catalysis, Journal Year: 2025, Volume and Issue: unknown, P. 115980 - 115980

Published: Jan. 1, 2025

Language: Английский

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Rates and reversibility of CO2 hydrogenation on Cu-based catalysts

Journal of Catalysis, Journal Year: 2023, Volume and Issue: 429, P. 115214 - 115214

Published: Nov. 20, 2023

Language: Английский

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Catalytic resonance theory: Circumfluence of programmable catalytic loops

Journal of Catalysis, Journal Year: 2024, Volume and Issue: 430, P. 115343 - 115343

Published: Feb. 1, 2024

Language: Английский

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Disclosing the Reaction Mechanism of CO₂ Hydrogenation to Methanol over CuCeO_x/TiO₂: A Combined Kinetic, Spectroscopic, and Isotopic Study

ACS Catalysis, Journal Year: 2023, Volume and Issue: 13(22), P. 14699 - 14715

Published: Oct. 31, 2023

Recent studies have focused on the promotion of methanol synthesis by CeO2 and inhibition reverse water gas shift reaction (r-WGSR) TiO2 support from perspective nature active sites morphology. Nevertheless, rational design catalysts needs to account additionally for mechanism, a topic that has not yet been addressed CuCeOx/TiO2. Herein, CO formation pathways over this catalytic system were unraveled. Kinetic, isotopic, spectroscopic techniques combined obtain mechanistic insights both reactions. Particularly, H2/D2 kinetic isotopic effect (KIE), hourly space velocity (GHSV) effect, cofeeding products, operando-diffuse reflectance infrared Fourier transform spectroscopy (operando-DRIFTS) under steady-state, transient, exchange conditions, 12CO2/13CO2 steady-state isotopic-transient analysis-DRIFT/mass spectrometry (SSITKA-DRIFTS/MS) performed. The results unequivocally ruled out an r-WGSR + hydrogenation pathway and, furthermore, demonstrated species is formed through stepwise formates Cu–Ce interfacial sites. Moreover, it was concluded occurs assisted hydrogen site different involved in synthesis. Likewise, relevance surface-detected carbonate discarded. From these insights, formal model derived, which accurately fitted experimental data correctly predicted properties behavior CuCeOx/TiO2 with concentrations. This study highlights importance combining analyses labeling order elucidate mechanisms interface between metal metal-oxide plays relevant role.

Language: Английский

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Band-division utilization of core-shell photocatalyst under condenser solar-light and enhancement of synergistic catalytic CO2 reduction

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 479, P. 147529 - 147529

Published: Nov. 19, 2023

Language: Английский

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Mechanistic and kinetic relevance of hydrogen and water in CO2 hydrogenation on Cu-based catalysts

Journal of Catalysis, Journal Year: 2025, Volume and Issue: unknown, P. 115936 - 115936

Published: Jan. 1, 2025

Language: Английский

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Chemical kinetics of heterogeneous catalysis: experimental research methodologies and case studies of site-isolated materials

Catalysis Reviews, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 47

Published: Jan. 6, 2025

Heterogeneous catalysts mediate chemical reactions at fluid–solid interfaces and contain active sites of diverse structure function. Chemical kinetic processes surfaces connect to macroscopic measurements through transport processes; thus, intrinsic require rendering irrelevant, or accurately modeling the influences of, gradients in thermodynamic activity temperature between bulk fluid phases. Quantifying turnover rates further requires methods quantify density putative on catalyst surfaces. This review discusses experimental research methodologies perform quantitative studies heterogeneous catalysis, highlighting examples from contemporary reports with a focus site-isolated materials.

Language: Английский

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