Experimental investigation of anion exchange membrane water electrolysis for a tubular microbial electrosynthesis cell design

Chen, Zhiyuan; Rodriguez, Asier Grijalvo; Nunez, Pello; Houtven, Diane van; Pant, Deepak; Vaes, Jan

doi:10.1016/j.catcom.2022.106502

Cited by 10 publications

(1 citation statement)

References 22 publications

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“…To achieve the high catalytic activity, selectivity, and long-term stability of the system, it is not only the catalyst selection, electrode materials and deposition techniques that are important. The choice of electrolyte [36,[55][56][57][58], gas diffusion electrode design [22,23,29,[34][35][36][37][59][60][61][62][63][64][65], and reactor design [4,[66][67][68][69][70][71][72][73][74] can also influenced the CO 2 RR reaction. The used cell design for the electrochemical characterisation of the prepared electrodes has been described in previous work [29,36].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Electrochemically Deposited Bi and Sn Catalysts onto Gas Diffusion Electrodes for the Electrochemical CO2 Reduction Reaction to Formate

et al. 2023

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In this publication, we report about the selectivity and stability of bismuth (Bi)- and tin (Sn)-based electrocatalysts for the electrochemical CO2 reduction reaction (eCO2RR) for formate production. Bismuth and tin were successfully electrodeposited using the pulse plating technique on top of and inside of the gas diffusion layers (GDLs). The distribution of the catalyst throughout the thickness of the gas diffusion electrodes (GDEs) was investigated by using scanning electron microscopy and computer tomography; it was found that the catalyst morphology determines the performance of the electrode. Inhomogeneous deposits, with their enlarged catalyst surface area, provide more active centres for the eCO2RR, resulting in increased Faraday efficiency (FE) for formate. The initial electrochemical characterisation tests of the bismuth- and tin-loaded GDEs were carried out under laboratory operating conditions at an industrially relevant current density of 200 mA·cm−2; complete Sn dissolution with a subsequent deformation of the GDL was observed. In contrast to these results, no leaching of the electrodeposited Bi catalyst was observed. An FE of 94.2% towards formate was achieved on these electrodes. Electrodes based on an electrodeposited Bi catalyst on an in-house prepared GDL are stable after 23 h time-on-stream at 200 mA·cm−2 and have very good selectivity for formate.

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