Facile electrochemical co-deposition of metal (Cu, Pd, Pt, Rh) nanoparticles on reduced graphene oxide for electrocatalytic reduction of nitrate/nitrite

Chencheng Sun, Fengwang Li, Hao An, Zhengkui Li, Alan M Bond, Jie Zhang

Research output: Contribution to journalArticleResearchpeer-review

8 Citations (Scopus)

Abstract

Monodispersed metal (Cu, Pd, Pt, Rh) nanoparticles have been anchored on reduced graphene oxide (rGO) by a facile electrochemical co-deposition method. Scanning electron microscopic images reveal the presence of homogeneously dispersed metal nanoparticles on the rGO nanosheets. The as-prepared nanocomposites demonstrate excellent electrocatalytic activity for electroreduction of NO3 and NO2 . The mechanisms associated with the best performed Rh-rGO were studied in detail by cyclic voltammetry, X-ray photoelectron spectroscopic (XPS) and Fourier transformed ac voltammetry. It is proposed that the electrocatalytic reduction of NO3 on Rh-rGO is catalyzed by an adsorbed H* (H+ aq + e → H*) species to form NO2 which is further catalyzed by H* to form a surface confined NO* intermediate. Rh-rGO displays high electrochemical stability for NO3 reduction over the pH range of 4–9, which could be a suitable candidate for applications in remediation of NO3 contamination.

Original languageEnglish
Pages (from-to)733-741
Number of pages9
JournalElectrochimica Acta
Volume269
DOIs
Publication statusPublished - 10 Apr 2018

Keywords

  • Electrocatalytic reduction
  • Electrochemical co-deposition
  • Metal nanoparticles
  • Nitrate/nitrite
  • Reduced graphene oxide

Cite this

@article{f8149621de904919983de38dba7343f5,
title = "Facile electrochemical co-deposition of metal (Cu, Pd, Pt, Rh) nanoparticles on reduced graphene oxide for electrocatalytic reduction of nitrate/nitrite",
abstract = "Monodispersed metal (Cu, Pd, Pt, Rh) nanoparticles have been anchored on reduced graphene oxide (rGO) by a facile electrochemical co-deposition method. Scanning electron microscopic images reveal the presence of homogeneously dispersed metal nanoparticles on the rGO nanosheets. The as-prepared nanocomposites demonstrate excellent electrocatalytic activity for electroreduction of NO3 − and NO2 −. The mechanisms associated with the best performed Rh-rGO were studied in detail by cyclic voltammetry, X-ray photoelectron spectroscopic (XPS) and Fourier transformed ac voltammetry. It is proposed that the electrocatalytic reduction of NO3 − on Rh-rGO is catalyzed by an adsorbed H* (H+ aq + e− → H*) species to form NO2 − which is further catalyzed by H* to form a surface confined NO* intermediate. Rh-rGO displays high electrochemical stability for NO3 − reduction over the pH range of 4–9, which could be a suitable candidate for applications in remediation of NO3 − contamination.",
keywords = "Electrocatalytic reduction, Electrochemical co-deposition, Metal nanoparticles, Nitrate/nitrite, Reduced graphene oxide",
author = "Chencheng Sun and Fengwang Li and Hao An and Zhengkui Li and Bond, {Alan M} and Jie Zhang",
year = "2018",
month = "4",
day = "10",
doi = "10.1016/j.electacta.2018.03.005",
language = "English",
volume = "269",
pages = "733--741",
journal = "Electrochimica Acta",
issn = "0013-4686",
publisher = "Elsevier",

}

Facile electrochemical co-deposition of metal (Cu, Pd, Pt, Rh) nanoparticles on reduced graphene oxide for electrocatalytic reduction of nitrate/nitrite. / Sun, Chencheng; Li, Fengwang; An, Hao; Li, Zhengkui; Bond, Alan M; Zhang, Jie.

In: Electrochimica Acta, Vol. 269, 10.04.2018, p. 733-741.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Facile electrochemical co-deposition of metal (Cu, Pd, Pt, Rh) nanoparticles on reduced graphene oxide for electrocatalytic reduction of nitrate/nitrite

AU - Sun, Chencheng

AU - Li, Fengwang

AU - An, Hao

AU - Li, Zhengkui

AU - Bond, Alan M

AU - Zhang, Jie

PY - 2018/4/10

Y1 - 2018/4/10

N2 - Monodispersed metal (Cu, Pd, Pt, Rh) nanoparticles have been anchored on reduced graphene oxide (rGO) by a facile electrochemical co-deposition method. Scanning electron microscopic images reveal the presence of homogeneously dispersed metal nanoparticles on the rGO nanosheets. The as-prepared nanocomposites demonstrate excellent electrocatalytic activity for electroreduction of NO3 − and NO2 −. The mechanisms associated with the best performed Rh-rGO were studied in detail by cyclic voltammetry, X-ray photoelectron spectroscopic (XPS) and Fourier transformed ac voltammetry. It is proposed that the electrocatalytic reduction of NO3 − on Rh-rGO is catalyzed by an adsorbed H* (H+ aq + e− → H*) species to form NO2 − which is further catalyzed by H* to form a surface confined NO* intermediate. Rh-rGO displays high electrochemical stability for NO3 − reduction over the pH range of 4–9, which could be a suitable candidate for applications in remediation of NO3 − contamination.

AB - Monodispersed metal (Cu, Pd, Pt, Rh) nanoparticles have been anchored on reduced graphene oxide (rGO) by a facile electrochemical co-deposition method. Scanning electron microscopic images reveal the presence of homogeneously dispersed metal nanoparticles on the rGO nanosheets. The as-prepared nanocomposites demonstrate excellent electrocatalytic activity for electroreduction of NO3 − and NO2 −. The mechanisms associated with the best performed Rh-rGO were studied in detail by cyclic voltammetry, X-ray photoelectron spectroscopic (XPS) and Fourier transformed ac voltammetry. It is proposed that the electrocatalytic reduction of NO3 − on Rh-rGO is catalyzed by an adsorbed H* (H+ aq + e− → H*) species to form NO2 − which is further catalyzed by H* to form a surface confined NO* intermediate. Rh-rGO displays high electrochemical stability for NO3 − reduction over the pH range of 4–9, which could be a suitable candidate for applications in remediation of NO3 − contamination.

KW - Electrocatalytic reduction

KW - Electrochemical co-deposition

KW - Metal nanoparticles

KW - Nitrate/nitrite

KW - Reduced graphene oxide

UR - http://www.scopus.com/inward/record.url?scp=85043764615&partnerID=8YFLogxK

U2 - 10.1016/j.electacta.2018.03.005

DO - 10.1016/j.electacta.2018.03.005

M3 - Article

VL - 269

SP - 733

EP - 741

JO - Electrochimica Acta

JF - Electrochimica Acta

SN - 0013-4686

ER -