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Incorporation of nickel single atoms into carbon paper as self-standing electrocatalyst for CO2 reduction

DOI: 10.1039/D0TA08433F DOI Help

Authors: Simin Li (Aarhus University) , Marcel Ceccato (Aarhus University) , Xiuyuan Lu (Cardiff Catalysis Institute, Cardiff University) , Sara Frank (Aarhus University) , Nina Lock (Aarhus University) , Alberto Roldan (Cardiff Catalysis Institute, Cardiff University) , Xin-Ming Hu (Aarhus University; Shandong University) , Troels Skrydstrup (Aarhus University) , Kim Daasbjerg (Aarhus University)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Journal Of Materials Chemistry A , VOL 119

State: Published (Approved)
Published: December 2020

Abstract: The design of selective and efficient catalysts for electrochemical CO2 reduction is highly desirable yet still challenging, in particular, if the aim is to make them binder-free and self-standing. Here, we report a new and straightforward strategy to incorporate Ni single atoms into a commercially available carbon paper to prepare a self-standing electrode. This is accomplished by consecutive acid activation, adsorption of Ni2+ ions, and pyrolysis steps. Structural characterizations and calculations based on density functional theory consistently suggest that the Ni single atoms are coordinated with three N and one S atoms on the carbon paper. When used for CO2 electroreduction, the electrode exhibits an optimal selectivity (91%), activity (3.4 mA cm−2), and stability (at least 14 h) for CO production in water at an overpotential of 660 mV. This report may inspire the design and incorporation of single atoms of various metal types into carbon papers, or other kinds of carbon substrates, for a wide range of electrocatalytic processes.

Diamond Keywords: Carbon Capture and Storage (CCS)

Subject Areas: Materials, Chemistry

Instruments: B18-Core EXAFS

Added On: 06/01/2021 09:16

Discipline Tags:

Earth Sciences & Environment Climate Change Physical Chemistry Catalysis Chemistry Materials Science

Technical Tags:

Spectroscopy X-ray Absorption Spectroscopy (XAS)