Solid-State Charge-Based Device for Control of Catalytic Carbon Monoxide Oxidation on Platinum Nanofilms Using External Bias and Light

Baker, L. Robert; Hervier, Antoine; Kennedy, Griffin; Somorjai, Gábor A.

doi:10.1021/nl3007787

Cited by 32 publications

(22 citation statements)

References 46 publications

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“…This was recently realized using a Pt/n-Si Schottky junction to reversibly control the rate of CO oxidation during steady-state kinetics. 22 As described in section 4, the electronic structure of the metal−support interface has a dominant effect on the kinetics of the supported metal catalysts. Fabrication of a Pt/n-Si catalytic nanodiode allows the electronic structure at this interface to be reversibly tuned by applying an external bias or by generating photoexcited charge carriers, as shown in Figure 28a.…”

Section: Solid-state Device For Electronic Control Of Surface Chemistrymentioning

confidence: 99%

Role of Hot Electrons and Metal–Oxide Interfaces in Surface Chemistry and Catalytic Reactions

2015

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Section: Solid-state Device For Electronic Control Of Surface Chemistrymentioning

confidence: 99%

Role of Hot Electrons and Metal–Oxide Interfaces in Surface Chemistry and Catalytic Reactions

2015

Self Cite

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“…In these cases, the chemically doped graphene serves as a electrochemical catalyst, for example, to enhance the electrochemical reduction of oxygen. Electrically charge‐doped catalyst had been also demonstrated previously, for example, by using an external bias to control catalytic activity of Pt on CO oxidation 19. In addition, external electric field had been also applied to study its effect on a wide range of chemical reactions 20–22.…”

Section: Introductionmentioning

confidence: 99%

Electric Field Effect on the Reactivity of Solid State Materials: The Case of Single Layer Graphene

Kim

Qiu

et al. 2020

Adv Funct Materials

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This manuscript reports the first example of charge‐doping‐induced reactivity enhancement in macroscopic‐sized solid state material. Single layer graphene is supported on a Si wafer that has a 300 nm thick SiO2 layer and is heated photothermally in air to ≈240 °C. Applying both positive and negative pulsed back gate voltages increases the rate of graphene oxidation, as measured by the change of ID/IG ratio using Raman spectroscopy. The fact that both electron and hole doping increase the reactivity argues against electrochemical oxidation and suggests a new mechanism is at play. The enhancement effect increases with the magnitude and the frequency of the square wave back gate voltage. Density functional theory calculations indicate that the activation barriers for O2 insertion into graphene and desorption of CO2 decrease in the presence of an electric field. This study suggests charge doping as a new approach that can modulate the reactivity of solid state materials in real time and compliment chemical‐based catalysis.

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“…[91] Reaction rates for CO oxidation have also been controlled simply by biasing the nanodiode or using illumination to change the electronic state of the diode and push electrons into the conduction band. [92] Very recently Pt-CdSe-Pt dumbbell nanostructures have also been used to allow light absorption to promote electrons within the CdSe semiconductor, which migrate to the Pt and enhance the rate of CO oxidation. [93] These examples show very clearly that it is possible to enhance reactions through electronic support-metal interactions.…”

Section: The Oxide Metal Interfacementioning

confidence: 99%

Conquering Catalyst Complexity: Nanoparticle Synthesis and Instrument Development for Molecular and Atomistic Characterisation Under In Situ Conditions

Somorjai

Beaumont

2015

Top Catal

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. (2015) 'Conquering catalyst complexity : nanoparticle synthesis and instrument development for molecular and atomistic characterisation under in situ conditions.', Topics in catalysis., 58 (10). pp. 560-572. Further information on publisher's website:http://dx.doi.org/10.1007/s11244-015- Publisher's copyright statement:The nal publication is available at Springer via http://dx.doi.org/10.1007/s11244-015-0398-5Additional information: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. resolution in situ techniques with atomically and molecularly well-defined nanoparticle catalysts to achieve this goal. In particular we focus on mono-dispersed metal nanoparticles in the 0.8 -10 nm range with precise size distribution provided by modern colloidal synthetic techniques. These have been used in conjunction with a range of in situ techniques for understanding the complexity of a number of catalytic phenomena. Drawing on the nanoparticle size discrimination afforded by this approach, most metal nanoparticle catalysed covalent bond making/breaking reactions are identified as being structure sensitive, even when that was previously not thought to be the case. Small nanoparticles, below 2 nm, have been found to have changes of electronic structure that give rise to high oxidation state clusters under reaction conditions. These have been utilized to heterogenize typically homogeneous catalytic reactions using metal nanoclusters in the range of 40 atoms or less to carry out reactions on their heterogenized surfaces that would typically be expected only to occur at the higher oxidation state metal centre of a homogeneous organometallic catalyst. The combination of in-situ techniques and highly controlled metal nanoparticle structure also allows valuable insights to be achieved in understanding the mechanisms of multicomponent catalysts, catalysis occurring in different fluid phases and phenomena occurring at the metal-oxide interface.

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Solid-State Charge-Based Device for Control of Catalytic Carbon Monoxide Oxidation on Platinum Nanofilms Using External Bias and Light

Cited by 32 publications

References 46 publications

Role of Hot Electrons and Metal–Oxide Interfaces in Surface Chemistry and Catalytic Reactions

Role of Hot Electrons and Metal–Oxide Interfaces in Surface Chemistry and Catalytic Reactions

Electric Field Effect on the Reactivity of Solid State Materials: The Case of Single Layer Graphene

Conquering Catalyst Complexity: Nanoparticle Synthesis and Instrument Development for Molecular and Atomistic Characterisation Under In Situ Conditions

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