Nano Research, volume 14, issue 10, pages 3497-3501

Intimate atomic Cu-Ag interfaces for high CO2RR selectivity towards CH4 at low over potential

Chungseok Choi ¹

Jin Cai ¹

Changsoo Lee ^{1, 2, 3}

Hyuck Mo Lee ³

Mingjie Xu ^{4, 5}

Yu Huang ¹

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Department of Materials Science and Engineering, University of California, Los Angeles, USA |

Hydrogen Energy Department, Korea Institute of Energy Research, Daejeon, Republic of Korea |

Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, DaeJeon, Republic of Korea |

⁴

Irvine Materials Research Institute (IMRI), University of California, Irvine, USA |

⁵

Department of Materials Science and Engineering, University of California, Irvine, USA |

Publication type: Journal Article

Publication date: 2021-07-21

Springer Nature

Journal: Nano Research

scimago Q1

SJR: 2.539

CiteScore: 14.3

Impact factor: 9.5

ISSN: 19980124, 19980000

DOI: 10.1007/s12274-021-3639-x

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Atomic and Molecular Physics, and Optics

Condensed Matter Physics

General Materials Science

Electrical and Electronic Engineering

Abstract

Developing highly efficient electrochemical catalysts for carbon dioxide reduction reaction (CO2RR) provides a solution to battle global warming issues resulting from ever-increasing carbon footprint due to human activities. Copper (Cu) is known for its efficiency in CO2RR towards value-added hydrocarbons; hence its unique structural properties along with various Cu alloys have been extensively explored in the past decade. Here, we demonstrate a two-step approach to achieve intimate atomic Cu-Ag interfaces on the surface of Cu nanowires, which show greatly improved CO2RR selectivity towards methane (CH4). The specially designed Cu-Ag interfaces showed an impressive maximum Faradaic efficiency (FE) of 72% towards CH4 production at −1.17 V (vs. reversible hydrogen electrode (RHE)).

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