Vertically Aligned Multiwalled Carbon Nanotube/Cu Catalysts for CO₂ Electroreduction

Eser Metin Akinoglu; Bohua Ren; Junyuan Xu; Dangsheng Su; Tengfei Qiu; Michael Giersig; Guobin Wen

doi:10.1021/acsanm.2c01728

journal article·2022-08-26

Vertically Aligned Multiwalled Carbon Nanotube/Cu Catalysts for CO₂ Electroreduction

Eser Metin Akinoglu, Bohua Ren, Junyuan Xu, Dangsheng Su, Tengfei Qiu, Michael Giersig, Guobin Wen

ACS Applied Nano Materials· Volume 5· Issue 8

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Source abstract

Abstract

Enhancing the selectivity of hydrocarbon products remains a key challenge to achieving artificial energy sustainability via closing the carbon cycle. While copper-based electrodes uniquely yield hydrocarbon products, the improvement of their product selectivity through physical morphology regulation shows great potential and requires further investigation. Here, we show the distinct morphological influences of the Cu electrode on the reaction selectivity. We synthesize binder-free, vertically aligned, nanoid forest-like copper electrocatalysts for superior improved methane conversion selectivity with respect to planar Cu. These Cu nanocomposites are fabricated through the conformal coating of vertically aligned multiwalled carbon nanotube array electrodes, which have matured to a cost-effective and scalable technology over the past two decades. Simulations reveal that carbon intermediates and protons can be confined in the gaps of the nanoid copper forest, which are formed in situ and in turn cover the catalytic sites and facilitate the simultaneous transfer of coupled electrons and protons. Such forest-like antenna morphology benefits from a threefold improvement of the CO2 electroreduction performance through a decreased reaction onset potential, an increased current density, and enhanced hydrocarbon selectivity.

Source: openalex_inverted_index · Quality: baseline

Research context

Nanomaterials Catalysis & surfaces

OpenAlex topics: CO2 Reduction Techniques and Catalysts · Advanced Thermoelectric Materials and Devices · Ionic liquids properties and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

International Academy of Optoelectronics at Zhaoqing, South China Normal University, Zhaoqing 526238, Guangdong, P. R. China

Department of Physics, Freie Universität Berlin, 14195 Berlin, Germany

School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangdong 510631, P. R. China

Department of Chemical Engineering, Waterloo Institute for Nanotechnology, Waterloo Institute for Sustainable Energy, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada

Laboratory of Advanced Spectro-electrochemistry and Li-on Batteries, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023 Dalian, P. R. China

Shenyang National Laboratory for Material Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, P. R. China

Nanomaterials Centre, School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia, QLD 4072 Australia

Funding

Guangdong Science and Technology Department · Guangdong Province Introduction of Innovative R&D Team · China Postdoctoral Science Foundation · National Natural Science Foundation of China

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