Supported ionic liquid phase-boosted highly active and durable electrocatalysts towards hydrogen evolution reaction in acidic electrolyte

Wang, Qiyou; Gao, Yang; Ma, Zhongyun; Zhang, Yan; Ni, Wenpeng; Younus, Hussein A.; Zhang, Ce; Chen, Zhengjian; Zhang, Shiguo

doi:10.1016/j.jechem.2020.06.012

Cited by 20 publications

(18 citation statements)

References 70 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the presence of liquid and the cell windows often significantly reduce the spatial resolution of the acquired images. Consequently, it is generally not possible to achieve atomic resolution in LC-(S)TEM, except in a few cases where graphene is used as the cell window material and the liquid layer is very thin [40][41][42] . Furthermore, the radiolysis of water caused by the electron beam irradiation produces various [71] , (B) an in situ electrochemical liquid cell placed in the optical path of TEM, and (C) an electrochemical microchip with micro-fabricated counter electrode (CE), working electrode (WE) and reference electrode (RE).…”

Section: In Situ Electron Microscopy For Electrocatalysismentioning

confidence: 99%

Applications of in situ electron microscopy in oxygen electrocatalysis

Wu¹,

Zhang²,

Chen³

et al. 2022

Microstructures

View full text Add to dashboard Cite

Oxygen electrocatalysis involving the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) plays a vital role in cutting-edge energy conversion and storage technologies. In situ studies of the evolution of catalysts during oxygen electrocatalysis can provide important insights into their structure - activity relationships and stabilities under working conditions. Among the various in situ characterization tools available, in situ electron microscopy has the unique ability to perform structural and compositional analyzes with high spatial resolution. In this review, we present the latest developments in in situ and quasi-in situ electron microscopic techniques, including identical location electron microscopy, in situ liquid cell (scanning) transmission electron microscopy and in situ environmental transmission electron microscopy, and elaborate their applications in the ORR and OER. Our discussion centers on the degradation mechanism, structural evolution and structure - performance correlations of electrocatalysts. Finally, we summarize the earlier discussions and share our perspectives on the current challenges and future research directions of using in situ electron microscopy to explore oxygen electrocatalysis and related processes.

show abstract

Section: In Situ Electron Microscopy For Electrocatalysismentioning

confidence: 99%

Applications of in situ electron microscopy in oxygen electrocatalysis

Wu¹,

Zhang²,

Chen³

et al. 2022

Microstructures

View full text Add to dashboard Cite

show abstract

“…[31][32][33] Thus, MH bond must be reduced to achieve efficient HER. [34][35][36] The charge density differences of the modeled structures were evaluated in Figure 4I-M 4M). This is due to the higher electronegativity of N atoms with unshared electron pairs and the partial positive charge of the H that is readily available for the acceptance of electrons.…”

Section: Theoretical Analysis Of the Roles Of Doping In Individual Co...mentioning

confidence: 99%

“…[ 31–33 ] Therefore, the H 3 O + should be eliminated to allow easy acceptance of electrons by the H + towards promoting HER by the TMN catalysts. [ 34–36 ]…”

Section: Introductionmentioning

confidence: 99%

In Situ Grown Co‐Based Interstitial Compounds: Non‐3d Metal and Non‐Metal Dual Modulation Boosts Alkaline and Acidic Hydrogen Electrocatalysis

Xiong

Yao

Zhu

et al. 2021

Small

129

View full text Add to dashboard Cite

Interfacial engineering and elemental doping are the two parameters to enhance the catalytic behavior of cobalt nitrides for the alkaline hydrogen evolution reaction (HER). However, simultaneously combining these two parameters to improve the HER catalytic properties of cobalt nitrides in alkaline media is rarely reported and also remains challenging in acidic media. Herein, it is demonstrated that high‐valence non‐3d metal and non‐metal integration can simultaneously achieve Co‐based nitride/oxide interstitial compound phase boundaries on stainless steel mesh (denoted Mo‐Co5.47N/N‐CoO) for efficient HER in alkaline and acidic media. Density functional theory (DFT) calculations show that the unique structure does not only realize multi‐active sites, enhanced water dissociation kinetics, and low hydrogen adsorption free energy in alkaline media, but also enhances the positive charge density of hydrogen ions (H+) to effectively allow H+ to receive electrons from the catalysts surface toward promoting the HER in acidic media. As a result, the as‐prepared Mo‐Co5.47N/N‐CoO demands HER overpotential of −28 mV@10 mA cm−2 in an alkaline medium, and superior to the commercial Pt/C at a current density > 44 mA cm−2 in acidic medium. This work paves a useful strategy to design efficient cobalt‐based electrocatalysts for HER and beyond.

show abstract

“…studied the HER performance of Pt/C catalyst before and after coating with two hydrophobic ILs, that is, 1,8‐Diazabicyclo[5.4.0]‐7‐Undecene bis(trifluoromethylsulfonyl)imide ([DBU][NTf 2 ]) and [C 4 C 1 im][NTf 2 ]. [ 128 ] Both IL coated Pt/C catalysts exhibited impressively high activity toward the HER. Specifically, their current densities at an overpotential of 40 mV are 2.8 and 4.2 times higher than that of the pristine Pt/C, along with a much superior electrochemical stability.…”

Section: Scill Concept In Electrocatalysismentioning

confidence: 99%

“…Most recently, Zhang et al studied . [128] Both IL coated Pt/C catalysts exhibited impressively high activity toward the HER. Specifically, their current densities at an overpotential of 40 mV are 2.8 and 4.2 times higher than that of the pristine Pt/C, along with a much superior electrochemical stability.…”

Section: Applications Of the Scill Concept In Other Electrocatalytic Processesmentioning

confidence: 99%

Emerging Applications of Solid Catalysts with Ionic Liquid Layer Concept in Electrocatalysis

Zhang

Etzold

2021

Adv Funct Materials

View full text Add to dashboard Cite

The concept of solid catalysts with ionic liquid layer (SCILL) originates from the field of heterogeneous catalysis, where it offers a unique way to regulate both the catalytic activity and selectivity. In recent years, applying this concept in electrocatalysis represented a new, exciting, and growing research field. Herein, emerging applications of the SCILL concept in the context of electrocatalysis for key energy storage/conversion processes such as oxygen reduction, oxygen evolution, and CO2 reduction reactions are comprehensively reviewed. Alongside case studies highlighting the history, development and latest progress of the SCILL concept, mechanistic underpinnings on the roles of ILs in each application are critically discussed. At the same time, the key challenges and future opportunities in fully leveraging the SCILL concept for either regulating the performance of electrocatalysts or gaining mechanistic understandings for those electrocatalytic processes with complex reaction pathways are outlined.

show abstract

Supported ionic liquid phase-boosted highly active and durable electrocatalysts towards hydrogen evolution reaction in acidic electrolyte

Cited by 20 publications

References 70 publications

Applications of in situ electron microscopy in oxygen electrocatalysis

Applications of in situ electron microscopy in oxygen electrocatalysis

In Situ Grown Co‐Based Interstitial Compounds: Non‐3d Metal and Non‐Metal Dual Modulation Boosts Alkaline and Acidic Hydrogen Electrocatalysis

Emerging Applications of Solid Catalysts with Ionic Liquid Layer Concept in Electrocatalysis

Contact Info

Product

Resources

About