Small molecule-assisted synthesis of carbon supported platinum intermetallic fuel cell catalysts

Tian-Wei Song, Cong Xu, Zhu-Tao Sheng, Hui-Kun Yan, Lei Tong, Jun Liu, Wei-Jie Zeng, Lu-Jie Zuo, Peng Yin, Ming Zuo, Sheng-Qi Chu, Ping Chen and Hai-Wei Liang ()
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Tian-Wei Song: University of Science and Technology of China
Cong Xu: University of Science and Technology of China
Zhu-Tao Sheng: Anhui Normal University
Hui-Kun Yan: University of Science and Technology of China
Lei Tong: University of Science and Technology of China
Jun Liu: Hefei Institutes of Physical Science, Chinese Academy of Sciences
Wei-Jie Zeng: University of Science and Technology of China
Lu-Jie Zuo: University of Science and Technology of China
Peng Yin: University of Science and Technology of China
Ming Zuo: University of Science and Technology of China
Sheng-Qi Chu: Chinese Academy of Sciences
Ping Chen: Anhui University
Hai-Wei Liang: University of Science and Technology of China

Nature Communications, 2022, vol. 13, issue 1, 1-11

Abstract: Abstract Supported ordered intermetallic compounds exhibit superior catalytic performance over their disordered alloy counterparts in diverse reactions. But the synthesis of intermetallic compounds catalysts often requires high-temperature annealing that leads to the sintering of metals into larger crystallites. Herein, we report a small molecule-assisted impregnation approach to realize the general synthesis of a family of intermetallic catalysts, consisting of 18 binary platinum intermetallic compounds supported on carbon blacks. The molecular additives containing heteroatoms (that is, O, N, or S) can be coordinated with platinum in impregnation and thermally converted into heteroatom-doped graphene layers in high-temperature annealing, which significantly suppress alloy sintering and insure the formation of small-sized intermetallic catalysts. The prepared optimal PtCo intermetallics as cathodic oxygen-reduction catalysts exhibit a high mass activity of 1.08 A mgPt–1 at 0.9 V in H2-O2 fuel cells and a rated power density of 1.17 W cm–2 in H2-air fuel cells.

Date: 2022
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DOI: 10.1038/s41467-022-34037-7

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