Metallic nanocatalysts for electrochemical CO2 reduction in aqueous solutions

Wang, Yuanxing; Niu, Cailing; Wang, Dunwei

doi:10.1016/j.jcis.2018.05.041

Cited by 35 publications

(25 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“… 8 , 9 Direct electroreduction at noble metal or carbon electrodes requires a substantial overpotential, and hence, a suitable choice of a more active metal as the working electrode can result in lower overpotentials and a variety of reduction products. 10 , 11 The main issue in the electrochemical reduction process is the requirement of high potential. 12 For instance, the reduction of CO 2 to CO 2 •– , which is a one-electron step, needs −1.90 V potential vs standard hydrogen electrode (SHE).…”

Section: Introductionmentioning

confidence: 99%

Investigation on Electroreduction of CO₂ to Formic Acid Using Cu₃(BTC)₂ Metal–Organic Framework (Cu-MOF) and Graphene Oxide

et al. 2020

View full text Add to dashboard Cite

A recent class of porous materials, viz., metal–organic frameworks (MOFs), finds applications in several areas. In this work, Cu-based MOFs (Cu–benzene-1,3,5-tricarboxylic acid) along with graphene oxide, viz., Cu-MOF/GO, are synthesized and used further for reducing CO 2 electrochemically. The reduction was accomplished in various supporting electrolytes, viz., KHCO 3 /H 2 O, tetrabutylammonium bromide (TBAB)/dimethylformamide (DMF), KBr/CH 3 OH, CH 3 COOK/CH 3 OH, TBAB/CH 3 OH, and tetrabutylammonium perchlorate (TBAP)/CH 3 OH to know their effect on product formation. The electrode fabricated with the synthesized material was used for testing the electroreduction of CO 2 at various polarization potentials. The electrochemical reduction of CO 2 is carried out via the polarization technique within the experimented potential regime vs saturated calomel electrode (SCE). Ion chromatography was employed for the analysis of the produced products in the electrolyte, and the results showed that HCOOH was the main product formed through reduction. The highest concentrations of HCOOH formed for different electrolytes are 0.1404 mM (−0.1 V), 66.57 mM (−0.6 V), 0.2690 mM (−0.5 V), 0.2390 mM (−0.5 V), 0.7784 mM (−0.4 V), and 0.3050 mM (−0.45 V) in various supporting electrolyte systems, viz., KHCO 3 /H 2 O, TBAB/DMF, KBr/CH 3 OH, CH 3 COOK/CH 3 OH, TBAB/CH 3 OH, and TBAP/CH 3 OH, respectively. The developed catalyst accomplished a significant efficiency in the conversion and reduction of CO 2 . A high faradic efficiency of 58% was obtained with 0.1 M TBAB/DMF electrolyte, whereas for Cu-MOF alone, the efficiency was 38%. Thus, the work is carried out using a cost-effective catalyst for the conversion of CO 2 to formic acid than using the commercial electrodes. The synergistic effect of GO sheets at 3 wt % concentration and Cu + OH – interaction leads to the formation of formic acid in various electrolytes.

show abstract

Section: Introductionmentioning

confidence: 99%

Investigation on Electroreduction of CO₂ to Formic Acid Using Cu₃(BTC)₂ Metal–Organic Framework (Cu-MOF) and Graphene Oxide

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Hence, utilizing heterogenous catalysts is more economically and environmentally viable at large scales. The heterogenous electrocatalysts fall under different categories including molecular catalysts, [71] metallic catalyst [34,71,116] carbon‐based catalysts and alloy electrocatalysts.…”

Section: Types Of Catalysts Used For Formate/formic Acid Productionmentioning

confidence: 99%

“…This efficiency is affected by the reaction conditions and electrode properties, which can significantly change the Sn reactivity. Its FE, which is a function of structure and morphology of catalyst, varies between 18–95 % [116] . FE, which is shown in Equation 1, is defined as the number of transferred electrons to produce a certain number of formate moles at a certain electric charge which is provided during the reaction [157] …”

Section: Types Of Catalysts Used For Formate/formic Acid Productionmentioning

confidence: 99%

Electroreduction of Carbon Dioxide into Formate: A Comprehensive Review

et al. 2021

View full text Add to dashboard Cite

Carbon dioxide conversion into useful products has been gaining considerable attention as a global‐warming‐mitigation technique. The electrochemical conversion of CO2 into high‐value chemicals involves the utilization of electrical energy in the presence of an effective catalyst. The process products depend on the number of transferred electrons during the reaction and the characteristics of the electrode. Recently, electrodes coupled with active catalysts have been used to convert CO2 into valuable products including formic acid, hydrocarbons, and syngas. This review offers an overview of the recent literature on the electrochemical conversion of CO2 to valuable products, with an emphasis on the production of formate/formic acid. In addition, it compares the main features of electrochemical conversion to other techniques and summarizes their key advantages. It also provides future perspective for research and development, such as the need for novel and selective catalysts to obtain high conversion and product yield with low energy consumption.

show abstract

“…Formic acid or alkali formate salts are attractive CO 2 electroreduction products because they are liquid phase, require only 2 electrons per product molecule, and can be synthesized at high selectivities on a number of non-precious metal catalysts [16,17]. Formic acid has a range of commercial uses including silage, textiles, leather tanning, pharmaceuticals, crop-protection, latex processing, and may also find use as a fuel for direct liquid fuel cells [18][19][20].…”

Section: A U T H O R Accepted Manuscript 1 Introductionmentioning

confidence: 99%

Electroreduction of carbon dioxide to formate at high current densities using tin and tin oxide gas diffusion electrodes

et al. 2019

View full text Add to dashboard Cite

We investigate tin (Sn) and tin oxide (SnO 2 ) nanoparticle catalysts deposited on gas diffusion layers for the electrochemical reduction of carbon dioxide (CO 2 ) to formate. The performance and durability of these electrodes was evaluated in a gas-fed electrolysis cell with a flowing liquid electrolyte stream and an integrated reference electrode. The SnO 2 electrodes achieved peak current densities of 385 ± 19 mA cm -2 while the Sn electrodes achieved peak current densities of 214 ± 6 mA cm -2 , both at a formate selectivity > 70%. The associated peak formate production rates of 7.4 ± 0.6 mmol m -2 s -1 (Sn) and 14.9 ± 0.8 mmol m -2 s -1 (SnO 2 ) were demonstrated for a 1 h electrolysis and compare favorably to prior literature. Post-test analyses reveal chemical and physical changes to both cathodes during electrolysis including oxide reduction at applied potentials less than -0.6 V vs. RHE, nanoparticle aggregation, and catalyst layer erosion. Understanding and mitigating these decay processes is key to extending electrode lifetime without sacrificing formate generation rates or process efficiency.

show abstract

Metallic nanocatalysts for electrochemical CO2 reduction in aqueous solutions

Cited by 35 publications

References 52 publications

Investigation on Electroreduction of CO₂ to Formic Acid Using Cu₃(BTC)₂ Metal–Organic Framework (Cu-MOF) and Graphene Oxide

Investigation on Electroreduction of CO₂ to Formic Acid Using Cu₃(BTC)₂ Metal–Organic Framework (Cu-MOF) and Graphene Oxide

Electroreduction of Carbon Dioxide into Formate: A Comprehensive Review

Electroreduction of carbon dioxide to formate at high current densities using tin and tin oxide gas diffusion electrodes

Contact Info

Product

Resources

About

Metallic nanocatalysts for electrochemical CO2 reduction in aqueous solutions

Cited by 35 publications

References 52 publications

Investigation on Electroreduction of CO2 to Formic Acid Using Cu3(BTC)2 Metal–Organic Framework (Cu-MOF) and Graphene Oxide

Investigation on Electroreduction of CO2 to Formic Acid Using Cu3(BTC)2 Metal–Organic Framework (Cu-MOF) and Graphene Oxide

Electroreduction of Carbon Dioxide into Formate: A Comprehensive Review

Electroreduction of carbon dioxide to formate at high current densities using tin and tin oxide gas diffusion electrodes

Contact Info

Product

Resources

About

Investigation on Electroreduction of CO₂ to Formic Acid Using Cu₃(BTC)₂ Metal–Organic Framework (Cu-MOF) and Graphene Oxide

Investigation on Electroreduction of CO₂ to Formic Acid Using Cu₃(BTC)₂ Metal–Organic Framework (Cu-MOF) and Graphene Oxide