DataVXACS Applied Energy MaterialsPaper
journal article·2020-09-28Open access

Water-Mediated ElectroHydrogenation of CO2 at Near-Equilibrium Potential by Carbon Nanotubes/Cerium Dioxide Nanohybrids

Giovanni Valenti, Michele Melchionna, Tiziano Montini, Alessandro Boni, Lucia Nasi, Emiliano Fonda, Alejandro Criado, Andrea Zitolo, Silvia Voci, Giovanni Bertoni, Marcella Bonchio, Paolo Fornasiero, Francesco Paolucci, Maurizio Prato

ACS Applied Energy Materials· Volume 3· Issue 9
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Source abstract

Abstract

The combination of multiwalled carbon nanotubes (MWCNTs) with undoped CeO2 nanoparticles (NPs) is effective for the direct electrocatalytic reduction of CO2 to formic acid (FA) at acidic pH (0.1 M HNO3), at overpotential as low as η = -0.02 V (vs RHE) with Faradic efficiency (FE) up to 65%. Ex situ and operando evidence identifies nonstoichiometric Ce4+/3+O2-x reduced sites as essential for the selective CO2 reduction reaction (CO2RR). The MWCNT-mediated electrochemical reduction of the CeO2 NPs offers a definite advantage with respect to the generally adopted thermochemical cycles (800-1500 °C) or deep hydrogenation pretreatments, thus presenting an interesting perspective for the engineering of CeO2 electrocatalysts.
Source: openalex_inverted_index · Quality: baseline

Research context

NanomaterialsCatalysis & surfaces

OpenAlex topics: CO2 Reduction Techniques and Catalysts · Carbon dioxide utilization in catalysis · Ammonia Synthesis and Nitrogen Reduction

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

Affiliations

Department of Chemistry “Giacomo Ciamician”, University of Bologna, via Selmi 2, 40126 Bologna, Italy

Department of Chemical and Pharmaceutical Sciences, University of Trieste and Consortium INSTM, Via L. Giorgieri 1, 34127 Trieste, Italy

CNR-IMEM Institute, Parco area delle Scienze 37/A, 43124 Parma, Italy

Synchrotron SOLEIL, L’Orme des Merisiers, BP48 Saint Aubin, 91192 Gif-sur-Yvette, France

Carbon Nanobiotechnology Laboratory, Center for Cooperative Research in Biomaterials (CIC biomaGUNE), Basque Research and Technology Alliance (BRTA), Paseo de Miramón 182, 20014 Donostia San Sebastián, Spain

CNR − Istituto Nanoscienze, Via Campi 213/A, 41125 Modena, Italy

ITM-CNR, Department of Chemical Sciences, University of Padova and Consortium INSTM, Via F. Marzolo 1, 35131 Padova, Italy

ICCOM-CNR, University of Trieste, Via L. Giorgieri 1, 34127 Trieste, Italy

ICMATE-CNR Bologna Associate Unit, University of Bologna, via Selmi 2, 40126 Bologna, Italy

Ikerbasque, Basque Foundation for Science, Bilbao 48013, Spain

Funding

AXA Research Fund · H2020 Environment · Ministero dell?Istruzione, dell?Universit? e della Ricerca · Ministerio de Econom?a y Competitividad · Universit? di Bologna · Universit? degli Studi di Trieste

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