journal article·2026-07-27

Ordered Ni–N–C Nanofibers Enable Spatially Uniform H + /CO 2 Distribution for Voltage-Tolerant CO 2 -to-CO Electroreduction

Nannan Chen, Qingle Yuan, Qin Liu, Chao Zhang, Zhengcui Wu, Wentuan Bi

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Abstract

Single-atom catalysts (SACs) hold great promise for the electrochemical reduction of CO2 to CO; however, the high selectivity is typically restricted within a narrow potential window, limiting their practical implementation. In this study, Ni-N-C catalysts were supported on ordered and disordered carbon nanofiber membranes (denoted as o-NiNC and d-NiNC, respectively) via electrospinning to elucidate the effect of nanofiber alignment on CO2 reduction activity. The results demonstrate that o-NiNC catalysts allow for spatially uniform H+/CO2 delivery and consumption, thereby mitigating the selectivity variations arising from uneven spatial distribution of reactants. As a result, the o-NiNC catalysts achieve a CO Faradaic efficiency (FE) of 98.5% at -1.0 V and maintain an FE above 90% across a broad potential range (-0.6 to -1.6 V). This work provides new insights into the rational design of high-performance CO2 reduction electrocatalysts through geometric engineering.
Source: europepmc · Quality: candidate unverified · Source record ↗

Research context

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Affiliations

Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Engineering Research Center of Carbon Neutrality, Anhui Key Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science

Anhui Normal University

Institute of Energy

Hefei Comprehensive National Science Center (Anhui Energy Laboratory)

Institute for New Energy Materials and Low-Carbon Technologies

Tianjin University of Technology

State Key Laboratory of Precision and Intelligent Chemistry

University of Science and Technology of China

Funding

Fundamental Research Funds for the Central Universities · National Natural Science Foundation of China · Natural Science Foundation of Anhui Province · 111 Project · University Synergy Innovation Program of Anhui Province · Natural Science Major Research Project of Anhui Education Department · Institute of Energy, Hefei Comprehensive National Science Center (Anhui Energy Laboratory)

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