“Sulfur-anchoring synthesis of platinum intermetallic nanoparticle catalysts for fuel cells” (2021), by Cheng-Long Yang et al. Energy research paper. Original abstract below, unchanged. No free PDF was found.

Sulfur-anchoring synthesis of platinum intermetallic nanoparticle catalysts for fuel cells

Cheng-Long Yang, Lina Wang, Peng Yin et al. · October 21, 2021 · Energy

Abstract

Atomically ordered intermetallic nanoparticles are promising for catalytic applications but are difficult to produce because the high-temperature annealing required for atom ordering inevitably accelerates metal sintering that leads to larger crystallites. We prepared platinum intermetallics with an average particle size of <5 nanometers on porous sulfur-doped carbon supports, on which the strong interaction between platinum and sulfur suppresses metal sintering up to 1000°C. We synthesized intermetallic libraries of small nanoparticles consisting of 46 combinations of platinum with 16 other metal elements and used them to study the dependence of electrocatalytic oxygen-reduction reaction activity on alloy composition and platinum skin strain. The intermetallic libraries are highly mass efficient in proton-exchange-membrane fuel cells and could achieve high activities of 1.3 to 1.8 amperes per milligram of platinum at 0.9 volts.

Source page DOI: 10.1126/science.abj9980