Infrared evidence of a formate-intermediate mechanism over Ca-modified supports in low-temperature ethanol steam reforming

Catherine Choong; Ziyi Zhong; Lin Huang; Armando Borgna; Liang Hong; Luwei Chen; Jianyi Lin

doi:10.1021/cs500358n

Infrared evidence of a formate-intermediate mechanism over Ca-modified supports in low-temperature ethanol steam reforming

Catherine Choong, Ziyi Zhong, Lin Huang, Armando Borgna, Liang Hong^*, Luwei Chen, Jianyi Lin

^*Corresponding author for this work

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

24 Scopus citations

Abstract

An in situ DRIFTS study of ethanol adsorption and desorption was performed on Pt (Rh, Pd) supported on Al₂O₃ and Ca-Al ₂O₃. Different from the well-known acetate-intermediate reaction mechanism observed on Al₂O₃-supported metal catalysts, formate species are exclusively observed on Pt (Rh, Pd) supported on Ca-Al₂O₃, offering a new mechanism denoted as the formate-intermediate mechanism. The key factor in determining the change in mechanism is the reduced availability of surface oxygen and the enhanced C-C breaking ability of the metal catalyst upon Ca modification. The formate-intermediate mechanism is favored in the presence of noble metals in the following order: Pt > Rh > Pd.

Original language	English
Pages (from-to)	2359-2363
Number of pages	5
Journal	ACS Catalysis
Volume	4
Issue number	7
DOIs	https://doi.org/10.1021/cs500358n
State	Published - 3 Jul 2014
Externally published	Yes

Keywords

Ca
Pd
Pt
Rh
acetate
ethanol steam reforming
formate
reaction pathway

Access to Document

10.1021/cs500358n

Cite this

@article{c095d95668a242a6b3125469b398b9f9,

title = "Infrared evidence of a formate-intermediate mechanism over Ca-modified supports in low-temperature ethanol steam reforming",

abstract = "An in situ DRIFTS study of ethanol adsorption and desorption was performed on Pt (Rh, Pd) supported on Al2O3 and Ca-Al 2O3. Different from the well-known acetate-intermediate reaction mechanism observed on Al2O3-supported metal catalysts, formate species are exclusively observed on Pt (Rh, Pd) supported on Ca-Al2O3, offering a new mechanism denoted as the formate-intermediate mechanism. The key factor in determining the change in mechanism is the reduced availability of surface oxygen and the enhanced C-C breaking ability of the metal catalyst upon Ca modification. The formate-intermediate mechanism is favored in the presence of noble metals in the following order: Pt > Rh > Pd.",

keywords = "Ca, Pd, Pt, Rh, acetate, ethanol steam reforming, formate, reaction pathway",

author = "Catherine Choong and Ziyi Zhong and Lin Huang and Armando Borgna and Liang Hong and Luwei Chen and Jianyi Lin",

year = "2014",

month = jul,

day = "3",

doi = "10.1021/cs500358n",

language = "英语",

volume = "4",

pages = "2359--2363",

journal = "ACS Catalysis",

issn = "2155-5435",

publisher = "American Chemical Society",

number = "7",

}

TY - JOUR

T1 - Infrared evidence of a formate-intermediate mechanism over Ca-modified supports in low-temperature ethanol steam reforming

AU - Choong, Catherine

AU - Zhong, Ziyi

AU - Huang, Lin

AU - Borgna, Armando

AU - Hong, Liang

AU - Chen, Luwei

AU - Lin, Jianyi

PY - 2014/7/3

Y1 - 2014/7/3

N2 - An in situ DRIFTS study of ethanol adsorption and desorption was performed on Pt (Rh, Pd) supported on Al2O3 and Ca-Al 2O3. Different from the well-known acetate-intermediate reaction mechanism observed on Al2O3-supported metal catalysts, formate species are exclusively observed on Pt (Rh, Pd) supported on Ca-Al2O3, offering a new mechanism denoted as the formate-intermediate mechanism. The key factor in determining the change in mechanism is the reduced availability of surface oxygen and the enhanced C-C breaking ability of the metal catalyst upon Ca modification. The formate-intermediate mechanism is favored in the presence of noble metals in the following order: Pt > Rh > Pd.

AB - An in situ DRIFTS study of ethanol adsorption and desorption was performed on Pt (Rh, Pd) supported on Al2O3 and Ca-Al 2O3. Different from the well-known acetate-intermediate reaction mechanism observed on Al2O3-supported metal catalysts, formate species are exclusively observed on Pt (Rh, Pd) supported on Ca-Al2O3, offering a new mechanism denoted as the formate-intermediate mechanism. The key factor in determining the change in mechanism is the reduced availability of surface oxygen and the enhanced C-C breaking ability of the metal catalyst upon Ca modification. The formate-intermediate mechanism is favored in the presence of noble metals in the following order: Pt > Rh > Pd.

KW - Ca

KW - Pd

KW - Pt

KW - Rh

KW - acetate

KW - ethanol steam reforming

KW - formate

KW - reaction pathway

UR - http://www.scopus.com/inward/record.url?scp=84903796253&partnerID=8YFLogxK

U2 - 10.1021/cs500358n

DO - 10.1021/cs500358n

M3 - 文章

AN - SCOPUS:84903796253

SN - 2155-5435

VL - 4

SP - 2359

EP - 2363

JO - ACS Catalysis

JF - ACS Catalysis

IS - 7

ER -

Infrared evidence of a formate-intermediate mechanism over Ca-modified supports in low-temperature ethanol steam reforming

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this