Defect-Free M/TiO2 Interfaces for Higher CO Oxidation Activity

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Solution Overview

Problem

The lack of understanding of the exact functionality of atomic structures at metal/oxide interfaces in governing catalytic activity hinders the development of effective catalysts, particularly in constructing distinct atomic structures solely at the metal/oxide interface rather than adjusting atomic and electronic structures of whole oxides.

Innovation Solution

The development of M/TiO2 composites with a defect-free M/TiO2 interface, achieved by calcinating M/TiO2 composites at specific temperatures to form a defect-free interface, where electrons transfer from Ti3+ species into Au nanoparticles, facilitating O2 activation and enhancing CO oxidation activity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If oxygen vacancies are introduced at the M/TiO2 interface to enhance catalytic activity, then CO oxidation activity is improved, but the interface becomes defective and electron distribution is disrupted

Engineering Contradiction:

ImproveCO oxidation activityVSAvoidinterface defect-free status

Core Design Contradiction:

ProductivityVSStability of the object's composition

Solution Approach 1:

The patent applies parameter changes by controlling the calcination temperature (e.g., 300-400°C) to remove oxygen vacancies from the M/TiO2 interface. This thermal treatment modifies the interface composition and electronic structure, transforming the interface from a defective state with oxygen vacancies to a defect-free state with optimized electron distribution, thereby achieving high CO oxidation activity without interface defects

Inventive Principle:

Principle #35Parameter changes

2Productivity

If the atomic structure of the entire oxide is adjusted to improve catalytic performance, then CO oxidation activity is enhanced, but the complexity of the modification process increases

Engineering Contradiction:

ImproveCO oxidation activityVSAvoidmodification process complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent applies local quality by focusing modifications exclusively on the M/TiO2 interface region rather than the entire oxide structure. By controlling metal nanoparticle deposition and subsequent calcination to achieve defect-free interfaces with specific electronic structures, the patent enhances CO oxidation activity through localized interface engineering, avoiding the complexity of bulk oxide modification

Inventive Principle:

Principle #3Local quality

3Productivity

If metal nanoparticles are integrated with TiO2 to create composite catalysts, then catalytic activity is improved, but the understanding of atomic structure functionality at interfaces remains insufficient

Engineering Contradiction:

Improvecatalytic activityVSAvoidinterface atomic structure understanding

Core Design Contradiction:

ProductivityVSLoss of information

Solution Approach 1:

The patent applies mechanics substitution by replacing traditional empirical catalyst development with a rational design approach based on understood atomic structure-function relationships. By establishing clear correlations between defect-free interface structures, electron distribution patterns, and CO oxidation activity, the patent substitutes trial-and-error methods with a mechanism-driven design strategy that enhances both catalytic activity and fundamental understanding

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The defect-free M/TiO2 interface exhibits significantly higher CO oxidation activity, up to 34 times greater than the oxygen vacancy-rich interface, demonstrating the importance of manipulating interfacial electron distribution for enhanced catalytic performance.

Implementation Method 1

electrons transfer from Ti3+ species into Au nanoparticles, facilitating O2 activation

Methodology Applied

Scientific EffectElectron transfer:

Implementation Method 2

M/TiO2 composite has the characteristic of having a higher CO oxidation activity

Methodology Applied

Scientific EffectCatalysis: Catalysis

Implementation Method 3

calcinating the M/TiO2 composite at about 300 to 350° C. for a time frame to form a M/TiO2 composite having a defect-free M/TiO2 interface

Methodology Applied

Scientific EffectThermal treatment: Heat Treatment

Implementation Method 4

heating a mixture of TiO2 with a metal nanoparticle precursor material

Methodology Applied

Scientific EffectThermal energy: Heating

Data Source

PatentUS20260027554A1M/TIO2 catalysts and methods of use

Publication Date: 2026.01.29 UNIV OF FLORIDA RESEARCH FOUNDATION INC

AI summary

The present disclosure provides for methods for designing and constructing metal/semiconductor heterostructures as catalysts for a wide range of applications such as oxygen activation. In a particular aspect, the present disclosure provides for the manipulation of atomic structures at M/TiO2 interface (e.g., Au/TiO2 interface) that significantly alters the interfacial electron distribution and prompts O2 activation. In an aspect, the present disclosure provides for a M/TiO2 composites (e.g., heterostructures) having a defect-free M/TiO2 interface and method of making the M/TiO2 composites having a defect-free M/TiO2 interface. The M can be Au, Ag, Cu, Al, Pt, Ni, or Pd, for example.