Amino-tethering synthesis strategy toward highly accessible sub-3-nm L10-PtM catalysts for high-power fuel cells

Qing Gong; Hong Zhang; Haoran Yu; Sungho Jeon; Yang Ren; Zhenzhen Yang; Cheng-Jun Sun; Eric A. Stach; Alexandre C. Foucher; Yikang Yu; Matthew Smart; Gabriel M. Filippelli; David A. Cullen; Ping Liu; Jian Xie

doi:10.1016/j.matt.2022.12.011

Amino-tethering synthesis strategy toward highly accessible sub-3-nm L1₀-PtM catalysts for high-power fuel cells

Qing Gong, Hong Zhang, Haoran Yu, Sungho Jeon, Yang Ren, Zhenzhen Yang, Cheng-Jun Sun, Eric A. Stach, Alexandre C. Foucher, Yikang Yu, Matthew Smart, Gabriel M. Filippelli, David A. Cullen, Ping Liu, Jian Xie^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

31 Citations (Scopus)

Abstract

Because of the poor accessibility of embedded active sites, platinum (Pt)-based electrocatalysts suffer from insufficient Pt utilization and mass transport in membrane electrode assemblies (MEAs), limiting their performance in polymer electrolyte membrane fuel cells. Here, we report a simple and universal approach to depositing sub-3-nm L1₀-PtM nanoparticles over external surfaces of carbon supports through pore-tailored amino (NH₂)-modification, which enables not only excellent activity for the oxygen reduction reaction, but also enhanced Pt utilization and mass transport in MEAs. Using a low loading of 0.10 mg_Pt·cm⁻², the MEA of PtCo/KB-NH₂ delivered an excellent mass activity of 0.691 A·mg_Pt⁻¹, a record-high power density of 0.96 W·cm⁻² at 0.67 V, and only a 30-mV drop at 0.80 A·cm⁻² after 30,000 voltage cycles, which meets nearly all targets set by the Department of Energy. This work provides an efficient strategy for designing advanced Pt-based electrocatalysts and realizing high-power fuel cells. © 2022 Elsevier Inc.

Original language	English
Pages (from-to)	963-982
Journal	Matter
Volume	6
Issue number	3
Online published	12 Jan 2023
DOIs	https://doi.org/10.1016/j.matt.2022.12.011
Publication status	Published - 1 Mar 2023
Externally published	Yes

Research Keywords

amino modification
L10-PtCo nanoparticle
MAP5: Improvement
membrane electrode assembly
oxygen reduction reaction
platinum-based intermetallic
proton exchange membrane fuel cell

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Cite this

@article{49e1192b122c4e2c997e7b734ea7e0d0,

title = "Amino-tethering synthesis strategy toward highly accessible sub-3-nm L10-PtM catalysts for high-power fuel cells",

abstract = "Because of the poor accessibility of embedded active sites, platinum (Pt)-based electrocatalysts suffer from insufficient Pt utilization and mass transport in membrane electrode assemblies (MEAs), limiting their performance in polymer electrolyte membrane fuel cells. Here, we report a simple and universal approach to depositing sub-3-nm L10-PtM nanoparticles over external surfaces of carbon supports through pore-tailored amino (NH2)-modification, which enables not only excellent activity for the oxygen reduction reaction, but also enhanced Pt utilization and mass transport in MEAs. Using a low loading of 0.10 mgPt·cm−2, the MEA of PtCo/KB-NH2 delivered an excellent mass activity of 0.691 A·mgPt−1, a record-high power density of 0.96 W·cm−2 at 0.67 V, and only a 30-mV drop at 0.80 A·cm−2 after 30,000 voltage cycles, which meets nearly all targets set by the Department of Energy. This work provides an efficient strategy for designing advanced Pt-based electrocatalysts and realizing high-power fuel cells. {\textcopyright} 2022 Elsevier Inc.",

keywords = "amino modification, L10-PtCo nanoparticle, MAP5: Improvement, membrane electrode assembly, oxygen reduction reaction, platinum-based intermetallic, proton exchange membrane fuel cell",

author = "Qing Gong and Hong Zhang and Haoran Yu and Sungho Jeon and Yang Ren and Zhenzhen Yang and Cheng-Jun Sun and Stach, {Eric A.} and Foucher, {Alexandre C.} and Yikang Yu and Matthew Smart and Filippelli, {Gabriel M.} and Cullen, {David A.} and Ping Liu and Jian Xie",

year = "2023",

month = mar,

day = "1",

doi = "10.1016/j.matt.2022.12.011",

language = "English",

volume = "6",

pages = "963--982",

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TY - JOUR

T1 - Amino-tethering synthesis strategy toward highly accessible sub-3-nm L10-PtM catalysts for high-power fuel cells

AU - Gong, Qing

AU - Zhang, Hong

AU - Yu, Haoran

AU - Jeon, Sungho

AU - Ren, Yang

AU - Yang, Zhenzhen

AU - Sun, Cheng-Jun

AU - Stach, Eric A.

AU - Foucher, Alexandre C.

AU - Yu, Yikang

AU - Smart, Matthew

AU - Filippelli, Gabriel M.

AU - Cullen, David A.

AU - Liu, Ping

AU - Xie, Jian

PY - 2023/3/1

Y1 - 2023/3/1

N2 - Because of the poor accessibility of embedded active sites, platinum (Pt)-based electrocatalysts suffer from insufficient Pt utilization and mass transport in membrane electrode assemblies (MEAs), limiting their performance in polymer electrolyte membrane fuel cells. Here, we report a simple and universal approach to depositing sub-3-nm L10-PtM nanoparticles over external surfaces of carbon supports through pore-tailored amino (NH2)-modification, which enables not only excellent activity for the oxygen reduction reaction, but also enhanced Pt utilization and mass transport in MEAs. Using a low loading of 0.10 mgPt·cm−2, the MEA of PtCo/KB-NH2 delivered an excellent mass activity of 0.691 A·mgPt−1, a record-high power density of 0.96 W·cm−2 at 0.67 V, and only a 30-mV drop at 0.80 A·cm−2 after 30,000 voltage cycles, which meets nearly all targets set by the Department of Energy. This work provides an efficient strategy for designing advanced Pt-based electrocatalysts and realizing high-power fuel cells. © 2022 Elsevier Inc.

AB - Because of the poor accessibility of embedded active sites, platinum (Pt)-based electrocatalysts suffer from insufficient Pt utilization and mass transport in membrane electrode assemblies (MEAs), limiting their performance in polymer electrolyte membrane fuel cells. Here, we report a simple and universal approach to depositing sub-3-nm L10-PtM nanoparticles over external surfaces of carbon supports through pore-tailored amino (NH2)-modification, which enables not only excellent activity for the oxygen reduction reaction, but also enhanced Pt utilization and mass transport in MEAs. Using a low loading of 0.10 mgPt·cm−2, the MEA of PtCo/KB-NH2 delivered an excellent mass activity of 0.691 A·mgPt−1, a record-high power density of 0.96 W·cm−2 at 0.67 V, and only a 30-mV drop at 0.80 A·cm−2 after 30,000 voltage cycles, which meets nearly all targets set by the Department of Energy. This work provides an efficient strategy for designing advanced Pt-based electrocatalysts and realizing high-power fuel cells. © 2022 Elsevier Inc.

KW - amino modification

KW - L10-PtCo nanoparticle

KW - MAP5: Improvement

KW - membrane electrode assembly

KW - oxygen reduction reaction

KW - platinum-based intermetallic

KW - proton exchange membrane fuel cell

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U2 - 10.1016/j.matt.2022.12.011

DO - 10.1016/j.matt.2022.12.011

M3 - RGC 21 - Publication in refereed journal

SN - 2590-2393

VL - 6

SP - 963

EP - 982

JO - Matter

JF - Matter

IS - 3

ER -