A comparative study of carbon supports for Pd/Au nanoparticle-based catalysts

Kavita Meduri, Arianna Rahimian, Riley Ann Humbert, Graham O.Brien Johnson, Paul Tratnyek, Jun Jiao

Research output: Contribution to journalArticle

Abstract

Carbon materials are promising supports for heterogeneous catalysis compared to oxide supports, such as titania, alumina, mesoporous silica, and hydrotalcite, because of their stability and relative chemical inertness. Additionally, the unique surface structures of carbon supports help control the growth, aggregation, and uniformity of the catalytic nanoparticles (NPs) hybridized with them. However, the effect of carbon supports on these NP catalysts is not well understood, affecting the optimization of this type of catalysts. In this study, palladium-gold (Pd/Au) carbon composites were systematically investigated, and the most favorable carbon support was identified. Carbon-supported Pd/Au NPs have often been favored for catalytic hydrodehalogenation (HDH) of volatile organic compounds. Hence, this study uses trichloroethylene (TCE) as model contaminant to investigate the effects of four types of carbon supports-granular activated carbon (GAC), carbon black, graphite, and graphite nanoplates-on the formation of catalytic Pd/Au NPs and their correlations to HDH reactions. Each support was chosen based on a desirable quality: GAC has a large surface area and substantial absorption capabilities, carbon black has a high surface-area-to-volume ratio and good chemical stability, graphite is the most stable form of carbon with a layered structure and thermal stability, and graphite nanoplates have large surface areas with structural stability. Characterizations of these Pd/Au-carbon composites show different NP sizes on each support, with GAC and carbon black generating smaller NPs. The HDH results suggest GAC, carbon black, and graphite nanoplates composites generate fast reaction rates. However, when comparing particle size and surface area, Pd/Au-GAC composites generate the fastest TCE degradation, providing a bigger boost to HDH rates than other types of carbon supports. More advantageously, GAC is widely available commercially with relatively low cost, and its high surface area is enabled by its high porosity, making GAC the preferred carbon support for Pd/Au NP catalyst mass production.

Original languageEnglish (US)
JournalMaterials Performance and Characterization
Volume8
Issue number3
DOIs
StatePublished - May 10 2019

Fingerprint

Catalyst supports
Carbon
Nanoparticles
Catalysts
Activated carbon
Graphite
Soot
Carbon black
Trichloroethylene
hydrotalcite
Composite materials
Volatile Organic Compounds
Aluminum Oxide
Chemical stability
Palladium
Volatile organic compounds
Surface structure
Silicon Dioxide
Gold
Oxides

Keywords

  • Carbon black
  • Carbon support
  • Catalysts
  • Granular activated carbon
  • Graphite
  • Hydrodehalogenation
  • Palladium-gold nanoparticles
  • Palladium-gold-carbon composites
  • Trichloroethylene

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials
  • Polymers and Plastics
  • Metals and Alloys

Cite this

A comparative study of carbon supports for Pd/Au nanoparticle-based catalysts. / Meduri, Kavita; Rahimian, Arianna; Humbert, Riley Ann; Johnson, Graham O.Brien; Tratnyek, Paul; Jiao, Jun.

In: Materials Performance and Characterization, Vol. 8, No. 3, 10.05.2019.

Research output: Contribution to journalArticle

Meduri, Kavita ; Rahimian, Arianna ; Humbert, Riley Ann ; Johnson, Graham O.Brien ; Tratnyek, Paul ; Jiao, Jun. / A comparative study of carbon supports for Pd/Au nanoparticle-based catalysts. In: Materials Performance and Characterization. 2019 ; Vol. 8, No. 3.
@article{10b4c6be0c67441d841d32ed171c23fe,
title = "A comparative study of carbon supports for Pd/Au nanoparticle-based catalysts",
abstract = "Carbon materials are promising supports for heterogeneous catalysis compared to oxide supports, such as titania, alumina, mesoporous silica, and hydrotalcite, because of their stability and relative chemical inertness. Additionally, the unique surface structures of carbon supports help control the growth, aggregation, and uniformity of the catalytic nanoparticles (NPs) hybridized with them. However, the effect of carbon supports on these NP catalysts is not well understood, affecting the optimization of this type of catalysts. In this study, palladium-gold (Pd/Au) carbon composites were systematically investigated, and the most favorable carbon support was identified. Carbon-supported Pd/Au NPs have often been favored for catalytic hydrodehalogenation (HDH) of volatile organic compounds. Hence, this study uses trichloroethylene (TCE) as model contaminant to investigate the effects of four types of carbon supports-granular activated carbon (GAC), carbon black, graphite, and graphite nanoplates-on the formation of catalytic Pd/Au NPs and their correlations to HDH reactions. Each support was chosen based on a desirable quality: GAC has a large surface area and substantial absorption capabilities, carbon black has a high surface-area-to-volume ratio and good chemical stability, graphite is the most stable form of carbon with a layered structure and thermal stability, and graphite nanoplates have large surface areas with structural stability. Characterizations of these Pd/Au-carbon composites show different NP sizes on each support, with GAC and carbon black generating smaller NPs. The HDH results suggest GAC, carbon black, and graphite nanoplates composites generate fast reaction rates. However, when comparing particle size and surface area, Pd/Au-GAC composites generate the fastest TCE degradation, providing a bigger boost to HDH rates than other types of carbon supports. More advantageously, GAC is widely available commercially with relatively low cost, and its high surface area is enabled by its high porosity, making GAC the preferred carbon support for Pd/Au NP catalyst mass production.",
keywords = "Carbon black, Carbon support, Catalysts, Granular activated carbon, Graphite, Hydrodehalogenation, Palladium-gold nanoparticles, Palladium-gold-carbon composites, Trichloroethylene",
author = "Kavita Meduri and Arianna Rahimian and Humbert, {Riley Ann} and Johnson, {Graham O.Brien} and Paul Tratnyek and Jun Jiao",
year = "2019",
month = "5",
day = "10",
doi = "10.1520/MPC20180147",
language = "English (US)",
volume = "8",
journal = "Materials Performance and Characterization",
issn = "2165-3992",
publisher = "ASTM International",
number = "3",

}

TY - JOUR

T1 - A comparative study of carbon supports for Pd/Au nanoparticle-based catalysts

AU - Meduri, Kavita

AU - Rahimian, Arianna

AU - Humbert, Riley Ann

AU - Johnson, Graham O.Brien

AU - Tratnyek, Paul

AU - Jiao, Jun

PY - 2019/5/10

Y1 - 2019/5/10

N2 - Carbon materials are promising supports for heterogeneous catalysis compared to oxide supports, such as titania, alumina, mesoporous silica, and hydrotalcite, because of their stability and relative chemical inertness. Additionally, the unique surface structures of carbon supports help control the growth, aggregation, and uniformity of the catalytic nanoparticles (NPs) hybridized with them. However, the effect of carbon supports on these NP catalysts is not well understood, affecting the optimization of this type of catalysts. In this study, palladium-gold (Pd/Au) carbon composites were systematically investigated, and the most favorable carbon support was identified. Carbon-supported Pd/Au NPs have often been favored for catalytic hydrodehalogenation (HDH) of volatile organic compounds. Hence, this study uses trichloroethylene (TCE) as model contaminant to investigate the effects of four types of carbon supports-granular activated carbon (GAC), carbon black, graphite, and graphite nanoplates-on the formation of catalytic Pd/Au NPs and their correlations to HDH reactions. Each support was chosen based on a desirable quality: GAC has a large surface area and substantial absorption capabilities, carbon black has a high surface-area-to-volume ratio and good chemical stability, graphite is the most stable form of carbon with a layered structure and thermal stability, and graphite nanoplates have large surface areas with structural stability. Characterizations of these Pd/Au-carbon composites show different NP sizes on each support, with GAC and carbon black generating smaller NPs. The HDH results suggest GAC, carbon black, and graphite nanoplates composites generate fast reaction rates. However, when comparing particle size and surface area, Pd/Au-GAC composites generate the fastest TCE degradation, providing a bigger boost to HDH rates than other types of carbon supports. More advantageously, GAC is widely available commercially with relatively low cost, and its high surface area is enabled by its high porosity, making GAC the preferred carbon support for Pd/Au NP catalyst mass production.

AB - Carbon materials are promising supports for heterogeneous catalysis compared to oxide supports, such as titania, alumina, mesoporous silica, and hydrotalcite, because of their stability and relative chemical inertness. Additionally, the unique surface structures of carbon supports help control the growth, aggregation, and uniformity of the catalytic nanoparticles (NPs) hybridized with them. However, the effect of carbon supports on these NP catalysts is not well understood, affecting the optimization of this type of catalysts. In this study, palladium-gold (Pd/Au) carbon composites were systematically investigated, and the most favorable carbon support was identified. Carbon-supported Pd/Au NPs have often been favored for catalytic hydrodehalogenation (HDH) of volatile organic compounds. Hence, this study uses trichloroethylene (TCE) as model contaminant to investigate the effects of four types of carbon supports-granular activated carbon (GAC), carbon black, graphite, and graphite nanoplates-on the formation of catalytic Pd/Au NPs and their correlations to HDH reactions. Each support was chosen based on a desirable quality: GAC has a large surface area and substantial absorption capabilities, carbon black has a high surface-area-to-volume ratio and good chemical stability, graphite is the most stable form of carbon with a layered structure and thermal stability, and graphite nanoplates have large surface areas with structural stability. Characterizations of these Pd/Au-carbon composites show different NP sizes on each support, with GAC and carbon black generating smaller NPs. The HDH results suggest GAC, carbon black, and graphite nanoplates composites generate fast reaction rates. However, when comparing particle size and surface area, Pd/Au-GAC composites generate the fastest TCE degradation, providing a bigger boost to HDH rates than other types of carbon supports. More advantageously, GAC is widely available commercially with relatively low cost, and its high surface area is enabled by its high porosity, making GAC the preferred carbon support for Pd/Au NP catalyst mass production.

KW - Carbon black

KW - Carbon support

KW - Catalysts

KW - Granular activated carbon

KW - Graphite

KW - Hydrodehalogenation

KW - Palladium-gold nanoparticles

KW - Palladium-gold-carbon composites

KW - Trichloroethylene

UR - http://www.scopus.com/inward/record.url?scp=85071336718&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85071336718&partnerID=8YFLogxK

U2 - 10.1520/MPC20180147

DO - 10.1520/MPC20180147

M3 - Article

VL - 8

JO - Materials Performance and Characterization

JF - Materials Performance and Characterization

SN - 2165-3992

IS - 3

ER -