Pt-Pyrrole Complex-Assisted Synthesis of Carbon-Supported Pt Intermetallics for Oxygen Reduction in Proton Exchange Membrane Fuel Cells

Jiang，Yuting1,2,3; Zhang，Qing2,3; Qian，Junning2,3; Wang，Yameng2,3; Mu，Yongbiao2,3; Zhang，Zhiyuan4; Li，Zheng1,2,3; Zhao，Tianshou1,2,3; Liu，Bilu4; Zeng，Lin2,3

2024-05-03

10.1021/acscatal.3c05471

ACS Catalysis   影响因子和分区

2155-5435

Nanosized intermetallic Pt-transition metal alloys with high catalytic activity and stability are considered as promising catalysts for the oxygen reduction reaction (ORR). However, the preparation of intermetallic Pt alloy nanoparticles remains a dilemma due to their pronounced tendency for sintering at high synthesizing temperatures. Here, we have synthesized several Pt intermetallics with an average size of 4 nm by employing carbon-supported Pt-pyrrole complex and transition metal (TM = Fe, Co, Ni) salts as precursors. Transmission electron microscope (TEM) results indicate that not only the uniform pregrowth of the Pt-pyrrole complex onto the carbon support but also the subsequently derived N-doped carbon shells (<1 nm) on the nanoparticles during annealing contribute to the formation of the nanosized intermetallics. Additional characterization suggests that the intermetallic alloy structure endows the catalyst (PtCo@Pt/C-6) with a downshifted Pt d-band center, which implies the weakened adsorption of the ORR intermediates on the Pt alloy, thus facilitating the ORR kinetics. The fuel cell with the as-prepared PtCo@Pt/C-6 catalyst displays a rated peak power density of 1.1 W/cm at 0.67 V (H/air) and a mass activity of 0.49 A/mg at 0.9 V, exceeding the targets of the US Department of Energy (1.0 W/cm and 0.44 A/mg, respectively). This method demonstrates great potentials for the scalable synthesis of PtTM/C catalysts with high ORR performance and promoting their applications in PEMFCs.

intermetallic electrocatalysts oxygen reduction reaction platinum alloys proton exchange membrane fuel cells Pt−pyrrole complex

SCI ; EI

英语

通讯

2-s2.0-85191194921

Scopus

1.Department of Mechanical and Aerospace Engineering,The Hong Kong University of Science and Technology,Hong Kong,00852,Hong Kong
2.Shenzhen Key Laboratory of Advanced Energy Storage,Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,518055,China
3.SUSTech Energy Institute for Carbon Neutrality,Southern University of Science and Technology,Shenzhen,518055,China
4.Shenzhen Geim Graphene Center,Tsinghua-Berkeley Shenzhen Institute and Institute of Materials Research,Tsinghua Shenzhen International Graduate School,Tsinghua University,Shenzhen,518055,China

Jiang，Yuting,Zhang，Qing,Qian，Junning,et al. Pt-Pyrrole Complex-Assisted Synthesis of Carbon-Supported Pt Intermetallics for Oxygen Reduction in Proton Exchange Membrane Fuel Cells[J]. ACS Catalysis,2024,14(9):6992-7000.

Jiang，Yuting.,Zhang，Qing.,Qian，Junning.,Wang，Yameng.,Mu，Yongbiao.,...&Zeng，Lin.(2024).Pt-Pyrrole Complex-Assisted Synthesis of Carbon-Supported Pt Intermetallics for Oxygen Reduction in Proton Exchange Membrane Fuel Cells.ACS Catalysis,14(9),6992-7000.

Jiang，Yuting,et al."Pt-Pyrrole Complex-Assisted Synthesis of Carbon-Supported Pt Intermetallics for Oxygen Reduction in Proton Exchange Membrane Fuel Cells".ACS Catalysis 14.9(2024):6992-7000.