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Issue 47, 2018
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Carbon-supported Ni nanoparticles for efficient CO2 electroreduction

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Abstract

The development of highly selective, low cost, and energy-efficient electrocatalysts is crucial for CO2 electrocatalysis to mitigate energy shortages and to lower the global carbon footprint. Herein, we first report that carbon-coated Ni nanoparticles supported on N-doped carbon enable efficient electroreduction of CO2 to CO. In contrast to most previously reported Ni metal catalysts that resulted in severe hydrogen evolution during CO2 conversion, the Ni particle catalyst here presents an unprecedented CO faradaic efficiency of approximately 94% at an overpotential of 0.59 V, even comparable to that of the best single Ni sites. The catalyst also affords a high CO partial current density and a large CO turnover frequency, reaching 22.7 mA cm−2 and 697 h−1 at −1.1 V (versus the reversible hydrogen electrode), respectively. Experiments combined with density functional theory calculations showed that the carbon layer coated on Ni and N-dopants in carbon material both play important roles in improving catalytic activity for electrochemical CO2 reduction to CO by stabilizing *COOH without affecting the easy *CO desorption ability of the catalyst.

Graphical abstract: Carbon-supported Ni nanoparticles for efficient CO2 electroreduction

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Publication details

The article was received on 21 Aug 2018, accepted on 04 Nov 2018 and first published on 06 Nov 2018


Article type: Edge Article
DOI: 10.1039/C8SC03732A
Citation: Chem. Sci., 2018,9, 8775-8780
  • Open access: Creative Commons BY license
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    Carbon-supported Ni nanoparticles for efficient CO2 electroreduction

    M. Jia, C. Choi, T. Wu, C. Ma, P. Kang, H. Tao, Q. Fan, S. Hong, S. Liu, Y. Soo, Y. Jung, J. Qiu and Z. Sun, Chem. Sci., 2018, 9, 8775
    DOI: 10.1039/C8SC03732A

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