Cataluminescence-based array imaging for high-throughput screening of heterogeneous catalysts

Area of Science:

• Materials Science
• Catalysis
• Nanotechnology

Background:

• High-throughput screening (HTS) is crucial for advancing catalyst discovery and reducing costs.
• Cataluminescence, light emission from catalytic reactions, offers a potential pathway for HTS.
• Carbon monoxide (CO) oxidation is a key reaction for catalyst development.

Purpose of the Study:

• To develop and validate a cataluminescence-based array imaging technique for HTS of catalysts.
• To assess the efficacy of this technique for screening catalysts used in CO oxidation.
• To demonstrate its potential for combinatorial catalyst discovery.

Main Methods:

• Preparation of nanosized monometallic (Au, Pt) and bimetallic (Au-Pt) catalysts supported on TiO(2) nanoparticles.
• Fabrication of a 4x4 array by depositing catalysts onto a ceramic chip.
• Utilizing cataluminescence imaging to record light emission intensity correlated with catalytic activity.
• Parallel evaluation of catalytic activity using gas chromatography for validation.

Main Results:

• The cataluminescence imaging technique successfully screened various Au, Pt, and Au-Pt catalysts with different loadings and ratios.
• A high correlation coefficient (0.914) was observed between cataluminescence imaging and gas chromatography results.
• The technique demonstrated fast evaluation of multiple catalysts across a range of working temperatures.

Conclusions:

• Cataluminescence-based array imaging is a feasible and effective HTS technique for evaluating catalyst activity in CO oxidation.
• This method accelerates catalyst discovery and optimization, particularly in nanotechnology and the catalyst industry.
• The technique holds significant promise for future high-throughput catalyst screening applications.