CuSn Alloy Nanoparticles on Nitrogen-Doped Graphene for Electrocatalytic CO2 Reduction

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Author(s)

  • Wei Xiong
  • Jian Yang
  • Ling Shuai
  • Yang Hou
  • Ming Qiu
  • Xinyong Li

Detail(s)

Original languageEnglish
Pages (from-to)5951-5957
Journal / PublicationChemElectroChem
Volume6
Issue number24
Online published25 Oct 2019
Publication statusPublished - 13 Dec 2019

Abstract

We report an efficient electrocatalyst utilizing non-noble metals consisting of Cu and Sn supported on nitrogen-doped graphene (NG) for reduction of CO2 over a wide potential range. The CuSn alloy nanoparticles (NPs) on NG were prepared through a hydrothermal method followed by pyrolysis under nitrogen atmosphere to achieve a uniform dispersion of the alloy NPs. The CuSn NP (Cu/Sn ratio of 0.175) decorated NG catalyst performed electrocatalytic reduction of CO2 into C1 products at a Faradaic efficiency (FE) of nearly 93 % at an overpotential of -1.0 V vs. RHE, considerably higher than that of the Cu and Sn counterparts, i. e., 32 % and 58 %, respectively. The enhanced catalytic activity could be attributed to the collaboration between the CuSn alloy and Sn metal. The first-principles density functional theory (DFT) simulation results indicate that the CuSn bimetal alloy nanoparticles enable more H atoms to participate in the electrocatalytic reduction of CO2 and exhibit an improved CO2 capture performance. In addition, the CuSn alloy having a lower barrier than that of Sn metal can accelerate the CO2 reduction process. This study presents the strategy that utilizes low-cost non-noble metals as highly efficient electrocatalysts for aqueous reduction of CO2.

Research Area(s)

  • CuSn nanoparticles, nitrogen-doped graphene, bimetal alloy, electrocatalysis, carbon dioxide reduction, METAL-ORGANIC FRAMEWORKS, ELECTROCHEMICAL REDUCTION, CARBON-DIOXIDE, FORMIC-ACID, AQUEOUS CO2, ELECTRODES, ELECTROREDUCTION, CATALYST, FORMATE, SIZE

Citation Format(s)

CuSn Alloy Nanoparticles on Nitrogen-Doped Graphene for Electrocatalytic CO2 Reduction. / Xiong, Wei; Yang, Jian; Shuai, Ling; Hou, Yang; Qiu, Ming; Li, Xinyong; Leung, Michael K. H.

In: ChemElectroChem, Vol. 6, No. 24, 13.12.2019, p. 5951-5957.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal