Details

Autor(en) / Beteiligte

• Yang, Cheng-Long
• Wang, Li-Na
• Yin, Peng
• Liu, Jieyuan
• Chen, Ming-Xi
• Yan, Qiang-Qiang
• Wang, Zheng-Shu
• Xu, Shi-Long
• Chu, Sheng-Qi
• Cui, Chunhua
• Ju, Huanxin
• Zhu, Junfa
• Lin, Yue
• Shui, Jianglan
• Liang, Hai-Wei

Titel

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

Ist Teil von

• Science (American Association for the Advancement of Science), 2021-10, Vol.374 (6566), p.459-464

Ort / Verlag

United States: The American Association for the Advancement of Science

Erscheinungsjahr

2021

Quelle

American Association for the Advancement of Science

Beschreibungen/Notizen

• 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.