I D
× COMMENTARYCOVER STORYIN THE NEWSNEWSFRONTSCHEMENTATOR + Show More
Chemical Engineering MagazineChementator Briefs
PDH catalyst Last month, Clariant's Catalyst business (Munich, Germany; www.clariant.com)…
BUSINESS NEWSTECHNICAL & PRACTICALFEATURE REPORTFACTS AT YOUR FINGERTIPSTECHNOLOGY PROFILESOLIDS PROCESSINGENGINEERING PRACTICEEQUIPMENT & SERVICESFOCUS
Focus on Pumps
Self-priming, liquid-ring pumps enable hygienic operation The CFS AS/ASH Series…
NEW PRODUCTS + Show More

Comment Processing & Handling

A little gold can reduce the Pt loading in fuel cells

By Paul Grad |

A challenge in the development of polymer-electrolyte membrane fuel cells is the durability and electrocatalytic activity of platinum-based electrocatalysts. The sluggishness of the oxygen reduction reaction (ORR) causes the fuel cell performance to be limited by the cathodic reaction, and a high Pt loading is required for the cathode catalyst to achieve good activity for the ORR. Now researchers from the Institute of Bioengineering and Nanotechnology (IBN; Singapore: www.ibn.a-star.edu.sg), led by IBN executive director, professor Jackie Y. Ying, have discovered that by replacing the central part of the catalyst with a gold-copper alloy and leaving just the outer layer in platinum, a superior electrocatalytic activity and excellent stability toward the ORR are achieved. The researchers reported the synthesis of core-shell AuCu@Pt nanoparticles by depositing Pt on preformed AuCu-alloy nanoparticles in oleylamine. The AuCu alloy core has a slightly smaller lattice parameter than Pt, creating a beneficial compressive strain effect on the Pt shell. In contrast, a tensile strain effect would be induced by depositing Pt on a core of Au — which has a larger lattice parameter than Pt — leading to a lower catalytic activity. In…
Related Content

Chemical Engineering publishes FREE eletters that bring our original content to our readers in an easily accessible email format about once a week.
Subscribe Now
Quadruple Sensor Lifetime with a Retractable Housing
Minimizing Explosion Risk Where Other Solutions Cannot
Minimizing Corrosion with Fast, Robust Gas Analysis
Lower Measurement Point Costs with Automatic pH Sensor Cleaning
Reduce the Risk of Corrosion in Fertilizer Production

View More

Live chat by BoldChat