Porous Hollow PtNi/C Electrocatalysts: Carbon Support Considerations to Meet Performance and Stability Requirements

Tristan Asset; Nathalie Job; Yan Busby; Alexandre Crisci; Vincent Martin; Vaios Stergiopoulos; Céline Bonnaud; Alexey Serov; Plamen Atanassov; Raphaël Chattot; Laetitia Dubau; Frédéric Maillard

doi:10.1021/acscatal.7b03539

Porous Hollow PtNi/C Electrocatalysts: Carbon Support Considerations to Meet Performance and Stability Requirements

Tristan Asset, Nathalie Job, Yan Busby, Alexandre Crisci, Vincent Martin, Vaios Stergiopoulos, Céline Bonnaud, Alexey Serov, Plamen Atanassov, Raphaël Chattot, Laetitia Dubau, Frédéric Maillard

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

67 Scopus citations

Abstract

The influence of the texture, structure, and chemistry of different carbon supports on the morphological properties, oxygen reduction reaction (ORR) activity, and stability of porous hollow PtNi nanoparticles (NPs) was investigated. The carbon nanomaterials included carbon blacks, carbon nanotubes, graphene nanosheets, and carbon xerogel and featured different specific surface areas, degrees of graphitization, and extent of surface functionalization. The external and inner diameters of the supported porous hollow PtNi/C NPs were found to decrease with an increase in the carbon mesopore surface area. Despite these differences, similar morphological properties and electrocatalytic activities for the ORR were reported. The stability of the synthesized electrocatalysts was assessed by simulating electrochemical potential variations occurring at a proton exchange membrane fuel cell (PEMFC) cathode during startup/shutdown events. Identical location transmission electron microscopy (IL-TEM) and electrochemical methods revealed the occurrence of a carbon-specific degradation mechanism: carbon corrosion into CO₂ and particle detachment were noticed on carbon xerogels and graphene nanosheets while, on carbon blacks, surface oxidation prevailed (C → CO_surf) and did not result in modified electrical resistance of the catalytic layers, rendering these carbon supports better suited to prepare highly active and stable ORR electrocatalysts.

Original language	English
Pages (from-to)	893-903
Number of pages	11
Journal	ACS Catalysis
Volume	8
Issue number	2
DOIs	https://doi.org/10.1021/acscatal.7b03539
State	Published - Feb 2 2018
Externally published	Yes

Funding

This work was performed within the framework of the Centre of Excellence of Multifunctional Architectured Materials “CEMAM” no. AN-10-LABX-44-01. The French National Research Agency (HOLLOW project, grant number ANR-14-CE05-0003-01) and the University of Grenoble Alpes (AGIR SCALE UP, grant no. LL1492017G and AGIR PEPS IN FINE, grant no. RECPEPINLEPG) financially supported this research. T.A. acknowledges IDS FunMat (Project 2012-04 LF) for funding his Ph.D. thesis fellowship. N.J. thanks the Walloon Region (project HYLIFE no. 1410135) and the Fonds de Bay for funding.

Funders	Funder number
AGIR	LL1492017G
AGIR PEPS IN FINE
Fonds de Bay
IDS FunMat
Walloon Region	1410135
Université Grenoble Alpes
Agence Nationale de la Recherche	ANR-14-CE05-0003-01

Keywords

carbon supported porous hollow Pt-based nanoparticles
oxygen reduction reaction
startup/shutdown events

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1021/acscatal.7b03539

Cite this

@article{fb6f444dba774a7995aed4939874ef81,

title = "Porous Hollow PtNi/C Electrocatalysts: Carbon Support Considerations to Meet Performance and Stability Requirements",

abstract = "The influence of the texture, structure, and chemistry of different carbon supports on the morphological properties, oxygen reduction reaction (ORR) activity, and stability of porous hollow PtNi nanoparticles (NPs) was investigated. The carbon nanomaterials included carbon blacks, carbon nanotubes, graphene nanosheets, and carbon xerogel and featured different specific surface areas, degrees of graphitization, and extent of surface functionalization. The external and inner diameters of the supported porous hollow PtNi/C NPs were found to decrease with an increase in the carbon mesopore surface area. Despite these differences, similar morphological properties and electrocatalytic activities for the ORR were reported. The stability of the synthesized electrocatalysts was assessed by simulating electrochemical potential variations occurring at a proton exchange membrane fuel cell (PEMFC) cathode during startup/shutdown events. Identical location transmission electron microscopy (IL-TEM) and electrochemical methods revealed the occurrence of a carbon-specific degradation mechanism: carbon corrosion into CO2 and particle detachment were noticed on carbon xerogels and graphene nanosheets while, on carbon blacks, surface oxidation prevailed (C → COsurf) and did not result in modified electrical resistance of the catalytic layers, rendering these carbon supports better suited to prepare highly active and stable ORR electrocatalysts.",

keywords = "carbon supported porous hollow Pt-based nanoparticles, oxygen reduction reaction, startup/shutdown events",

author = "Tristan Asset and Nathalie Job and Yan Busby and Alexandre Crisci and Vincent Martin and Vaios Stergiopoulos and C{\'e}line Bonnaud and Alexey Serov and Plamen Atanassov and Rapha{\"e}l Chattot and Laetitia Dubau and Fr{\'e}d{\'e}ric Maillard",

note = "Publisher Copyright: {\textcopyright} 2017 American Chemical Society.",

year = "2018",

month = feb,

day = "2",

doi = "10.1021/acscatal.7b03539",

language = "English",

volume = "8",

pages = "893--903",

journal = "ACS Catalysis",

issn = "2155-5435",

publisher = "American Chemical Society",

number = "2",

}

TY - JOUR

T1 - Porous Hollow PtNi/C Electrocatalysts

T2 - Carbon Support Considerations to Meet Performance and Stability Requirements

AU - Asset, Tristan

AU - Job, Nathalie

AU - Busby, Yan

AU - Crisci, Alexandre

AU - Martin, Vincent

AU - Stergiopoulos, Vaios

AU - Bonnaud, Céline

AU - Serov, Alexey

AU - Atanassov, Plamen

AU - Chattot, Raphaël

AU - Dubau, Laetitia

AU - Maillard, Frédéric

PY - 2018/2/2

Y1 - 2018/2/2

N2 - The influence of the texture, structure, and chemistry of different carbon supports on the morphological properties, oxygen reduction reaction (ORR) activity, and stability of porous hollow PtNi nanoparticles (NPs) was investigated. The carbon nanomaterials included carbon blacks, carbon nanotubes, graphene nanosheets, and carbon xerogel and featured different specific surface areas, degrees of graphitization, and extent of surface functionalization. The external and inner diameters of the supported porous hollow PtNi/C NPs were found to decrease with an increase in the carbon mesopore surface area. Despite these differences, similar morphological properties and electrocatalytic activities for the ORR were reported. The stability of the synthesized electrocatalysts was assessed by simulating electrochemical potential variations occurring at a proton exchange membrane fuel cell (PEMFC) cathode during startup/shutdown events. Identical location transmission electron microscopy (IL-TEM) and electrochemical methods revealed the occurrence of a carbon-specific degradation mechanism: carbon corrosion into CO2 and particle detachment were noticed on carbon xerogels and graphene nanosheets while, on carbon blacks, surface oxidation prevailed (C → COsurf) and did not result in modified electrical resistance of the catalytic layers, rendering these carbon supports better suited to prepare highly active and stable ORR electrocatalysts.

AB - The influence of the texture, structure, and chemistry of different carbon supports on the morphological properties, oxygen reduction reaction (ORR) activity, and stability of porous hollow PtNi nanoparticles (NPs) was investigated. The carbon nanomaterials included carbon blacks, carbon nanotubes, graphene nanosheets, and carbon xerogel and featured different specific surface areas, degrees of graphitization, and extent of surface functionalization. The external and inner diameters of the supported porous hollow PtNi/C NPs were found to decrease with an increase in the carbon mesopore surface area. Despite these differences, similar morphological properties and electrocatalytic activities for the ORR were reported. The stability of the synthesized electrocatalysts was assessed by simulating electrochemical potential variations occurring at a proton exchange membrane fuel cell (PEMFC) cathode during startup/shutdown events. Identical location transmission electron microscopy (IL-TEM) and electrochemical methods revealed the occurrence of a carbon-specific degradation mechanism: carbon corrosion into CO2 and particle detachment were noticed on carbon xerogels and graphene nanosheets while, on carbon blacks, surface oxidation prevailed (C → COsurf) and did not result in modified electrical resistance of the catalytic layers, rendering these carbon supports better suited to prepare highly active and stable ORR electrocatalysts.

KW - carbon supported porous hollow Pt-based nanoparticles

KW - oxygen reduction reaction

KW - startup/shutdown events

UR - http://www.scopus.com/inward/record.url?scp=85041412340&partnerID=8YFLogxK

U2 - 10.1021/acscatal.7b03539

DO - 10.1021/acscatal.7b03539

M3 - Article

AN - SCOPUS:85041412340

SN - 2155-5435

VL - 8

SP - 893

EP - 903

JO - ACS Catalysis

JF - ACS Catalysis

IS - 2

ER -

Porous Hollow PtNi/C Electrocatalysts: Carbon Support Considerations to Meet Performance and Stability Requirements

Abstract

Funding

Keywords

UN SDGs

Access to Document

Other files and links

Fingerprint

Cite this