Exhaustive testing

In situ mass spectrometry and X-ray diffraction data sensitive to metal nanoparticle surface structure have been combined to investigate the ambient pressure carbon monoxide oxidation over a platinum-rhodium catalyst. Given that catalytic converters are increasingly important in cleaning exhaust emissions from vehicles and even in industrial exhaust scrubbing there is an increasing need to find ways to improve their efficiency and efficacy at removing noxious gases, such as nitrogen oxides and carbon monoxide from such exhausts. It appears from this latest study that nanoparticles with lots of edges rather than smoother particles can sidestep poisoning to some degree and stay active longer, pointing to a new approach to designing catalyst particles.