Polyethylenimine promoted electrocatalytic reduction of CO2 to CO in aqueous medium by graphene-supported amorphous molybdenum sulphide

Fengwang Li, Shu-Feng Zhao, Lu Chen, Azam Khan, Douglas R Macfarlane, Jie Zhang

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Efficiently and selectively converting CO2 to value-added carbon compounds remains a major challenge in sustainable energy research. In this paper, we report the synthesis of a cost-effective catalyst, i.e. amorphous molybdenum sulphide on a polyethylenimine modified reduced graphene oxide substrate, for electrocatalytically reducing CO2 into CO in CO2 saturated aqueous NaHCO3 medium with high efficiency and selectivity. The catalyst is capable of producing CO at overpotentials as low as 140 mV and reaches a maximum faradaic efficiency of 85.1% at an overpotential of 540 mV. At an overpotential of 290 mV with respect to the formation of CO, it catalyzes the formation of syngas with high stability. Detailed investigations reveal that PEI works as a co-catalyst by providing a synergetic effect with MoSx.

Original languageEnglish
Pages (from-to)216-223
Number of pages8
JournalEnergy & Environmental Science
Volume9
Issue number1
DOIs
Publication statusPublished - 1 Jan 2016

Cite this

@article{be38386eb7c04e3d9a7f3c018596e4c6,
title = "Polyethylenimine promoted electrocatalytic reduction of CO2 to CO in aqueous medium by graphene-supported amorphous molybdenum sulphide",
abstract = "Efficiently and selectively converting CO2 to value-added carbon compounds remains a major challenge in sustainable energy research. In this paper, we report the synthesis of a cost-effective catalyst, i.e. amorphous molybdenum sulphide on a polyethylenimine modified reduced graphene oxide substrate, for electrocatalytically reducing CO2 into CO in CO2 saturated aqueous NaHCO3 medium with high efficiency and selectivity. The catalyst is capable of producing CO at overpotentials as low as 140 mV and reaches a maximum faradaic efficiency of 85.1{\%} at an overpotential of 540 mV. At an overpotential of 290 mV with respect to the formation of CO, it catalyzes the formation of syngas with high stability. Detailed investigations reveal that PEI works as a co-catalyst by providing a synergetic effect with MoSx.",
author = "Fengwang Li and Shu-Feng Zhao and Lu Chen and Azam Khan and Macfarlane, {Douglas R} and Jie Zhang",
year = "2016",
month = "1",
day = "1",
doi = "10.1039/c5ee02879e",
language = "English",
volume = "9",
pages = "216--223",
journal = "Energy & Environmental Science",
issn = "1754-5692",
publisher = "The Royal Society of Chemistry",
number = "1",

}

Polyethylenimine promoted electrocatalytic reduction of CO2 to CO in aqueous medium by graphene-supported amorphous molybdenum sulphide. / Li, Fengwang; Zhao, Shu-Feng; Chen, Lu; Khan, Azam; Macfarlane, Douglas R; Zhang, Jie.

In: Energy & Environmental Science, Vol. 9, No. 1, 01.01.2016, p. 216-223.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Polyethylenimine promoted electrocatalytic reduction of CO2 to CO in aqueous medium by graphene-supported amorphous molybdenum sulphide

AU - Li, Fengwang

AU - Zhao, Shu-Feng

AU - Chen, Lu

AU - Khan, Azam

AU - Macfarlane, Douglas R

AU - Zhang, Jie

PY - 2016/1/1

Y1 - 2016/1/1

N2 - Efficiently and selectively converting CO2 to value-added carbon compounds remains a major challenge in sustainable energy research. In this paper, we report the synthesis of a cost-effective catalyst, i.e. amorphous molybdenum sulphide on a polyethylenimine modified reduced graphene oxide substrate, for electrocatalytically reducing CO2 into CO in CO2 saturated aqueous NaHCO3 medium with high efficiency and selectivity. The catalyst is capable of producing CO at overpotentials as low as 140 mV and reaches a maximum faradaic efficiency of 85.1% at an overpotential of 540 mV. At an overpotential of 290 mV with respect to the formation of CO, it catalyzes the formation of syngas with high stability. Detailed investigations reveal that PEI works as a co-catalyst by providing a synergetic effect with MoSx.

AB - Efficiently and selectively converting CO2 to value-added carbon compounds remains a major challenge in sustainable energy research. In this paper, we report the synthesis of a cost-effective catalyst, i.e. amorphous molybdenum sulphide on a polyethylenimine modified reduced graphene oxide substrate, for electrocatalytically reducing CO2 into CO in CO2 saturated aqueous NaHCO3 medium with high efficiency and selectivity. The catalyst is capable of producing CO at overpotentials as low as 140 mV and reaches a maximum faradaic efficiency of 85.1% at an overpotential of 540 mV. At an overpotential of 290 mV with respect to the formation of CO, it catalyzes the formation of syngas with high stability. Detailed investigations reveal that PEI works as a co-catalyst by providing a synergetic effect with MoSx.

UR - http://www.scopus.com/inward/record.url?scp=84953402538&partnerID=8YFLogxK

UR - http://pubs.rsc.org.ezproxy.lib.monash.edu.au/en/content/articlepdf/2016/ee/c5ee02879e?page=search

U2 - 10.1039/c5ee02879e

DO - 10.1039/c5ee02879e

M3 - Article

VL - 9

SP - 216

EP - 223

JO - Energy & Environmental Science

JF - Energy & Environmental Science

SN - 1754-5692

IS - 1

ER -