Superior Performance of Ag over Pt for Hydrogen Evolution Reaction in Water Electrolysis under High Overpotentials

Mo, Jiaying; Stefanov, B.; Lau, Thomas H. M.; Chen, Tianyi; Wu, Shuming; Wang, Zhiqiang; Gong, Xue‐Qing; Wilkinson, Ian; Schmid, Günter; Tsang, Shik Chi Edman

doi:10.1021/acsaem.8b01777

Cited by 29 publications

(16 citation statements)

References 49 publications

(89 reference statements)

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“…However, mass transport losses must first be minimized in order to facilitate high current density operation. While extensive research has been conducted for designing the catalyst layer − and membrane to advance electrolyzer performance, the strategic design of porous transport layers (PTLs) for high current density operation ( i > 5 A/cm 2 ) has been largely overlooked in the field.…”

Section: Introductionmentioning

confidence: 99%

Accelerating Bubble Detachment in Porous Transport Layers with Patterned Through-Pores

Lee

Fahy

et al. 2020

ACS Appl. Energy Mater.

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Mass transport losses ultimately suppress gas evolving electrochemical energy conversion technologies, such as fuel cells and carbon dioxide electrolyzers, from reaching the high current densities needed to realize commercial success. In this work, we reach ultrahigh current densities up to 9 A/cm 2 in a polymer electrolyte membrane (PEM) water electrolyzer with the application of custom porous transport layers (PTLs) with patterned through-pores (PTPs), and we reduce the mass transport overpotentials of the electrolyzer by up to 76.7 %. This dramatic performance improvement stems from the 43.5 % reduction in gas saturation at the catalyst layer-PTL interface region. Moreover, the presence of PTPs leads to more rapid bubble coalescence and subsequently more frequent bubble snap-off (∼3.3 Hz), thereby enhancing the rate of gas removal and liquid water reactant delivery to the reaction sites. This work is highly informative for designing PTLs for optimal gas removal for a wide range of gas evolving electrochemical energy conversion technologies.

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Section: Introductionmentioning

confidence: 99%

Accelerating Bubble Detachment in Porous Transport Layers with Patterned Through-Pores

Lee

Fahy

et al. 2020

ACS Appl. Energy Mater.

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“…It confirmed that silver nanoparticles are evenly distributed on the surface of the stainless steel electrode through SEM analysis in Figure 1c. In addition, the high activity and conductivity of silver nanoparticles can complement the disadvantages of stainless steel materials and, at the same time, have a high surface area [22,31,32]. As a result, it shows high HER activity and stability during the electrocatalytic reaction than conventional stainless steel electrodes.…”

Section: Resultsmentioning

confidence: 99%

Stable Surface Technology for HER Electrodes

Kim

Flores

et al. 2021

Catalysts

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With the rapid increase in energy consumption worldwide, the development of renewable and alternative energy sources can sustain long-term development in the energy field. Hydrogen (H2), which is one of the clean chemical fuels, has the highest weight energy density and its combustion byproduct is only water. Among the various methods of producing hydrogen source, water electrolysis is a process that can effectively produce H2. However, it is difficult for commercialization of water electrolysis for H2 production due to the high cost and low abundance of noble metal-based cathodic electrode used for highly efficiency. Several studies have been conducted to reduce noble metal loading and/or completely replace them with other materials to overcome these obstacles. Among them, stainless steel contains many components of transition metals (Ni, Cr, Co) but have sluggish reaction kinetics and small active surface area. In this study, the problem of stainless steel was to be solved by utilizing the electrocatalytic properties of silver nanoparticles on the electrode surface, and electrodes were easily fabricated through the electrodeposition process. In addition, the surface shape, elemental properties, and HER activity of the electrode was analyzed by comparing it with the commercialized silver nanoparticle-coated invasive electrodes from Inanos (Inano-Ag-IE) through the plasma coating process. As a result, silver nanoparticle-coated conventional electrode (Ag-CE) fabricated through electrodeposition confirmed high HER activity and stability. However, the Inano-Ag-IE showed low HER activity as silver nanoparticles were not found. We encourage further research on the production process of such products for sustainable energy applications.

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“…There are many challenges to achieve an excellent catalyst for water electrolysis. Precious metals and metal oxides have been widely investigated as the catalyst for water electrolysis due to their high catalytic activity on OER and HER [287,288] . However, their exorbitant cost, rare reserves, and poor durability during electrolysis hindered their application in industrial hydrogen production [289] .…”

Section: Water Electrolysismentioning

confidence: 99%

Mesoporous Carbon Materials for Electrochemical Energy Storage and Conversion

Yuan

Gao

et al. 2022

ChemElectroChem

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To meet the high‐speed commercialization demands of electrochemical energy storage and conversion devices, the development of high‐performance and low‐cost electrode materials is urgently necessary. Mesoporous carbon, which shows excellent intrinsic characteristics and flexible structure, has raised a surge of interest recently since it offers opportunities for improving the energy or power density and durability as well as reducing the cost of electrodes. In this paper, we first review primary methods for preparing mesoporous carbons. Next, the obstacles in lithium batteries, supercapacitors, proton exchange membrane fuel cells and water electrolyzers are analyzed and the recent progresses of mesoporous carbon based electrode designs in solving these obstacles are systematically introduced. Finally, we outline current challenges and future directions of developing mesoporous carbon based electrode materials in electrochemical energy storage and conversion devices. In creating this review, we hope to give a succinct introduction to the mesoporous carbon and provide meaningful references for its future research.

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Superior Performance of Ag over Pt for Hydrogen Evolution Reaction in Water Electrolysis under High Overpotentials

Cited by 29 publications

References 49 publications

Accelerating Bubble Detachment in Porous Transport Layers with Patterned Through-Pores

Accelerating Bubble Detachment in Porous Transport Layers with Patterned Through-Pores

Stable Surface Technology for HER Electrodes

Mesoporous Carbon Materials for Electrochemical Energy Storage and Conversion

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