Tuning oxygen vacancy in SnO2 inhibits Pt migration and agglomeration towards high-performing fuel cells

Shenzhou Li; Junyi Liu; Jiashun Liang; Zijie Lin; Xuan Liu; Yuan Chen; Gang Lu; Chengliang Wang; Peng Wei; Jiantao Han; Yunhui Huang; Gang Wu; Qing Li

doi:10.1016/j.apcatb.2022.122017

Tuning oxygen vacancy in SnO₂ inhibits Pt migration and agglomeration towards high-performing fuel cells

Shenzhou Li
, Junyi Liu
, Jiashun Liang
, Zijie Lin
, Xuan Liu
, Yuan Chen
, Gang Lu
, Chengliang Wang
, Peng Wei
, Jiantao Han
, Yunhui Huang
, Gang Wu
, Qing Li

Department of Chemical and Biological Engineering

Huazhong University of Science and Technology
California State University Northridge

Research output: Contribution to journal › Article › peer-review

68 Scopus citations

Abstract

The serious durability concerns of carbon supported Pt electrocatalysts for oxygen reduction reaction (ORR) have strictly limited the commercialization of fuel cells. Herein, cable-like carbon nanotubes (CNTs)@SnO₂ core@shell supports with regulable electronic metal-support interaction (EMSI) are designed for Pt nanoparticles (NPs) as ORR catalysts. Impressively, the best-performing Pt-CNT@SnO₂ catalyst with optimized d-band center achieves an excellent activity (mass activity (MA) of 0.68 A mg_Pt⁻¹ at 0.9 V_iR-free and peak power density of 1618 mW cm⁻²) and record-high durability in H₂-O₂ fuel cells (9.2 % MA and 8 % power density loss after 5k cycles under 1.0–1.5 V) among the reported Pt-based catalysts, which is also superior to the U.S. DOE 2025 targets. Density functional theory (DFT) calculations reveal that the strong metal-support bonding interaction (SMSBI) endows much larger adhesion energy and migration barrier towards Pt atoms compared to carbon supports, leading to the extraordinarily high stability in fuel cells.

Original language	English
Article number	122017
Journal	Applied Catalysis B: Environmental
Volume	320
DOIs	https://doi.org/10.1016/j.apcatb.2022.122017
State	Published - Jan 2023

Keywords

Durability
Electrocatalysis
Fuel cells
Metal-support bonding interaction
Oxygen reduction reaction

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10.1016/j.apcatb.2022.122017

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title = "Tuning oxygen vacancy in SnO2 inhibits Pt migration and agglomeration towards high-performing fuel cells",

abstract = "The serious durability concerns of carbon supported Pt electrocatalysts for oxygen reduction reaction (ORR) have strictly limited the commercialization of fuel cells. Herein, cable-like carbon nanotubes (CNTs)@SnO2 core@shell supports with regulable electronic metal-support interaction (EMSI) are designed for Pt nanoparticles (NPs) as ORR catalysts. Impressively, the best-performing Pt-CNT@SnO2 catalyst with optimized d-band center achieves an excellent activity (mass activity (MA) of 0.68 A mgPt−1 at 0.9 ViR-free and peak power density of 1618 mW cm−2) and record-high durability in H2-O2 fuel cells (9.2 \% MA and 8 \% power density loss after 5k cycles under 1.0–1.5 V) among the reported Pt-based catalysts, which is also superior to the U.S. DOE 2025 targets. Density functional theory (DFT) calculations reveal that the strong metal-support bonding interaction (SMSBI) endows much larger adhesion energy and migration barrier towards Pt atoms compared to carbon supports, leading to the extraordinarily high stability in fuel cells.",

keywords = "Durability, Electrocatalysis, Fuel cells, Metal-support bonding interaction, Oxygen reduction reaction",

author = "Shenzhou Li and Junyi Liu and Jiashun Liang and Zijie Lin and Xuan Liu and Yuan Chen and Gang Lu and Chengliang Wang and Peng Wei and Jiantao Han and Yunhui Huang and Gang Wu and Qing Li",

note = "Publisher Copyright: {\textcopyright} 2022 Elsevier B.V.",

year = "2023",

month = jan,

doi = "10.1016/j.apcatb.2022.122017",

language = "English",

volume = "320",

journal = "Applied Catalysis B: Environmental",

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TY - JOUR

T1 - Tuning oxygen vacancy in SnO2 inhibits Pt migration and agglomeration towards high-performing fuel cells

AU - Li, Shenzhou

AU - Liu, Junyi

AU - Liang, Jiashun

AU - Lin, Zijie

AU - Liu, Xuan

AU - Chen, Yuan

AU - Lu, Gang

AU - Wang, Chengliang

AU - Wei, Peng

AU - Han, Jiantao

AU - Huang, Yunhui

AU - Wu, Gang

AU - Li, Qing

PY - 2023/1

Y1 - 2023/1

N2 - The serious durability concerns of carbon supported Pt electrocatalysts for oxygen reduction reaction (ORR) have strictly limited the commercialization of fuel cells. Herein, cable-like carbon nanotubes (CNTs)@SnO2 core@shell supports with regulable electronic metal-support interaction (EMSI) are designed for Pt nanoparticles (NPs) as ORR catalysts. Impressively, the best-performing Pt-CNT@SnO2 catalyst with optimized d-band center achieves an excellent activity (mass activity (MA) of 0.68 A mgPt−1 at 0.9 ViR-free and peak power density of 1618 mW cm−2) and record-high durability in H2-O2 fuel cells (9.2 % MA and 8 % power density loss after 5k cycles under 1.0–1.5 V) among the reported Pt-based catalysts, which is also superior to the U.S. DOE 2025 targets. Density functional theory (DFT) calculations reveal that the strong metal-support bonding interaction (SMSBI) endows much larger adhesion energy and migration barrier towards Pt atoms compared to carbon supports, leading to the extraordinarily high stability in fuel cells.

AB - The serious durability concerns of carbon supported Pt electrocatalysts for oxygen reduction reaction (ORR) have strictly limited the commercialization of fuel cells. Herein, cable-like carbon nanotubes (CNTs)@SnO2 core@shell supports with regulable electronic metal-support interaction (EMSI) are designed for Pt nanoparticles (NPs) as ORR catalysts. Impressively, the best-performing Pt-CNT@SnO2 catalyst with optimized d-band center achieves an excellent activity (mass activity (MA) of 0.68 A mgPt−1 at 0.9 ViR-free and peak power density of 1618 mW cm−2) and record-high durability in H2-O2 fuel cells (9.2 % MA and 8 % power density loss after 5k cycles under 1.0–1.5 V) among the reported Pt-based catalysts, which is also superior to the U.S. DOE 2025 targets. Density functional theory (DFT) calculations reveal that the strong metal-support bonding interaction (SMSBI) endows much larger adhesion energy and migration barrier towards Pt atoms compared to carbon supports, leading to the extraordinarily high stability in fuel cells.

KW - Durability

KW - Electrocatalysis

KW - Fuel cells

KW - Metal-support bonding interaction

KW - Oxygen reduction reaction

UR - https://www.scopus.com/pages/publications/85138793132

U2 - 10.1016/j.apcatb.2022.122017

DO - 10.1016/j.apcatb.2022.122017

M3 - Article

AN - SCOPUS:85138793132

SN - 0926-3373

VL - 320

JO - Applied Catalysis B: Environmental

JF - Applied Catalysis B: Environmental

M1 - 122017

ER -

Tuning oxygen vacancy in SnO₂ inhibits Pt migration and agglomeration towards high-performing fuel cells

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Keywords

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