Achieving Both High Selectivity and Current Density for CO<sub>2</sub> Reduction to Formate on Nanoporous Tin Foam Electrocatalysts

Du, Dongwei; Lan, Rong; Humphreys, John; Sengodan, Sivaprakash; Xie, Kui; Wang, Huanting; Tao, Shanwen

doi:10.1002/slct.201600451

Cited by 40 publications

(33 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These metals belong, according to Winand's classification, to the group of normal or intermediate metals. A non‐exhaustive list includes pure metals such as Sn [66,67] Pb, [68] Zn, [69,70] Bi, [71] Ag [72–74] and Cu, [75–78] as well as bimetallic systems where Sn foams are deposited on Cu surfaces [79–84] or when smoothly dispersed Ag and Cu form one bimetallic foam structure [85,86] . In what follows, we summarize the DHBT‐assisted preparation strategies of these metal foams, as well as some important aspects of CO 2 reduction occurring on them.…”

Section: Some Metal Foams Prepared By Dhbt With Potential Applicatiomentioning

confidence: 99%

Hydrogen Bubble Templated Metal Foams as Efficient Catalysts of CO₂ Electroreduction

et al. 2020

View full text Add to dashboard Cite

The creation of open porous structures with an extremely high surface area is of great technological relevance. The electrochemical deposition of metal foams around co‐generated hydrogen bubbles that act as templates for the deposition is a promising, cheap and simple approach to the fabrication of new electrocatalyst materials. Metal foams obtained by dynamic hydrogen bubble templating (DHBT) offer an intrinsically high electrical conductance with an open porous structure that enables the fast transport of gases and liquids. As an additional benefit, the confined space within the pores of DHBT metal foams may act as small reactors that can harbour reactions not possible at an open electrode interface. The number, distribution, and size of the pores can be fine‐tuned by an appropriate choice of the electrolysis parameters so that metal foam catalysts prepared by the DHBT technique meet certain requirements. In this paper, we review the preparation of certain metal foams, and their applications as catalysts for the electrochemical reduction of CO2.

show abstract

Section: Some Metal Foams Prepared By Dhbt With Potential Applicatiomentioning

confidence: 99%

Hydrogen Bubble Templated Metal Foams as Efficient Catalysts of CO₂ Electroreduction

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Various papers have provided excellent summary reviews on previous experimental work (Jitaru, 2007 ; Rosen et al, 2011 ; Lu et al, 2014 ; Qiao et al, 2014 ; Pletcher, 2015 ; Du, 2017 ) and will not be further described here. More recently, a number of investigators have gone one step further, conducting and reporting studies providing performance data on complete electrochemical CO 2 cell conversion performance in producing formate/formic acid (Mahmood et al, 1987 ; Li and Oloman, 2005 , 2006 , 2007 ; Oloman and Li, 2008 ; Whipple et al, 2010 ; Agarwal et al, 2011 ; Alvarez-Guerra et al, 2012 , 2014 ; Kopljar et al, 2014 ; White et al, 2014 ; Du et al, 2016 ; Sen et al, 2016 ).…”

Section: Electrochemical Conversion Of Co 2 To Formentioning

confidence: 99%

Carbon Dioxide and Water Electrolysis Using New Alkaline Stable Anion Membranes

et al. 2018

View full text Add to dashboard Cite

The recent development and market introduction of a new type of alkaline stable imidazole-based anion exchange membrane and related ionomers by Dioxide Materials is enabling the advancement of new and improved electrochemical processes which can operate at commercially viable operating voltages, current efficiencies, and current densities. These processes include the electrochemical conversion of CO2 to formic acid (HCOOH), CO2 to carbon monoxide (CO), and alkaline water electrolysis, generating hydrogen at high current densities at low voltages without the need for any precious metal electrocatalysts. The first process is the direct electrochemical generation of pure formic acid in a three-compartment cell configuration using the alkaline stable anion exchange membrane and a cation exchange membrane. The cell operates at a current density of 140 mA/cm2 at a cell voltage of 3.5 V. The power consumption for production of formic acid (FA) is about 4.3–4.7 kWh/kg of FA. The second process is the electrochemical conversion of CO2 to CO, a key focus product in the generation of renewable fuels and chemicals. The CO2 cell consists of a two-compartment design utilizing the alkaline stable anion exchange membrane to separate the anode and cathode compartments. A nanoparticle IrO2 catalyst on a GDE structure is used as the anode and a GDE utilizing a nanoparticle Ag/imidazolium-based ionomer catalyst combination is used as a cathode. The CO2 cell has been operated at current densities of 200 to 600 mA/cm2 at voltages of 3.0 to 3.2 respectively with CO2 to CO conversion selectivities of 95–99%. The third process is an alkaline water electrolysis cell process, where the alkaline stable anion exchange membrane allows stable cell operation in 1 M KOH electrolyte solutions at current densities of 1 A/cm2 at about 1.90 V. The cell has demonstrated operation for thousands of hours, showing a voltage increase in time of only 5 μV/h. The alkaline electrolysis technology does not require any precious metal catalysts as compared to polymer electrolyte membrane (PEM) design water electrolyzers. In this paper, we discuss the detailed technical aspects of these three technologies utilizing this unique anion exchange membrane.

show abstract

“…Moreover, a three‐dimensional (3D) hierarchical electrode composed of mesoporous SnO 2 nanosheets on carbon cloth enabled an extremely high partial current density of approximately 45 mA cm −2 with a high FE of 87 % at −1.6 V vs. Ag/AgCl . The superior performance of the 3D electrode was attributed to its large surface area and facilitated mass‐transfer properties . Furthermore, gas diffusion electrode and microfluidic reactor system have been utilized to overcome mass transport limitations resulting from low solubility of CO 2 .…”

Section: Introductionmentioning

confidence: 99%

Reaction Mechanisms of the Electrochemical Conversion of Carbon Dioxide to Formic Acid on Tin Oxide Electrodes

et al. 2017

View full text Add to dashboard Cite

Recent reports on the electrochemical production of formate demonstrate that reduced metal oxides play a key role in activating stable CO2 molecules. To expand a pre‐existing design principle of catalysts to a higher level, one of the remaining issues is to clearly understand the reaction mechanism. In recent years, mechanistic studies on SnOx catalysts, one of the most popular candidates for CO2 conversion to formate, have been intensively conducted in various aspects. In this Minireview, we summarize the reaction mechanisms of formate production based on computational, electrokinetic and in situ analyses focusing on SnOx catalysts. Starting from theoretical points including key intermediates, reaction pathway, and selectivity for formate production over pure metals, the discussion is expanded to the reaction mechanism on oxide surface.

show abstract

Achieving Both High Selectivity and Current Density for CO₂ Reduction to Formate on Nanoporous Tin Foam Electrocatalysts

Cited by 40 publications

References 38 publications

Hydrogen Bubble Templated Metal Foams as Efficient Catalysts of CO₂ Electroreduction

Hydrogen Bubble Templated Metal Foams as Efficient Catalysts of CO₂ Electroreduction

Carbon Dioxide and Water Electrolysis Using New Alkaline Stable Anion Membranes

Reaction Mechanisms of the Electrochemical Conversion of Carbon Dioxide to Formic Acid on Tin Oxide Electrodes

Contact Info

Product

Resources

About

Achieving Both High Selectivity and Current Density for CO2 Reduction to Formate on Nanoporous Tin Foam Electrocatalysts

Cited by 40 publications

References 38 publications

Hydrogen Bubble Templated Metal Foams as Efficient Catalysts of CO2 Electroreduction

Hydrogen Bubble Templated Metal Foams as Efficient Catalysts of CO2 Electroreduction

Carbon Dioxide and Water Electrolysis Using New Alkaline Stable Anion Membranes

Reaction Mechanisms of the Electrochemical Conversion of Carbon Dioxide to Formic Acid on Tin Oxide Electrodes

Contact Info

Product

Resources

About

Achieving Both High Selectivity and Current Density for CO₂ Reduction to Formate on Nanoporous Tin Foam Electrocatalysts

Hydrogen Bubble Templated Metal Foams as Efficient Catalysts of CO₂ Electroreduction

Hydrogen Bubble Templated Metal Foams as Efficient Catalysts of CO₂ Electroreduction