Multiple strategies of porous tetrametallene for efficient ethanol electrooxidation

Xiong, Juan; Li, Hongdong; Pan, Yue; Liu, Jiao; Zhang, Yan; Xu, Jixiang; Li, Bin; Lai, Jianping; Wang, Lei

doi:10.1039/d2ta05109e

Cited by 7 publications

(6 citation statements)

References 57 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In recent years, noble metal-based metallenes have emerged as a highly efficient class of two-dimensional electrocatalysts owing to their considerably high atomic utilization, specific surface area, and exposure to active sites [38][39][40][41][42][43][44][45][46][47][48]. The optimized contact of the electrocatalysts with supports is also guaranteed through the construction of such twodimensional materials.…”

Section: Dimensional Engineering Of Pt-based Alloys For Mormentioning

confidence: 99%

Platinum Alloys for Methanol Oxidation Electrocatalysis: Reaction Mechanism and Rational Design of Catalysts with Exceptional Activity and Stability

Yu,

Zhang,

Deng

et al. 2024

Catalysts

View full text Add to dashboard Cite

Direct methanol fuel cells have emerged as highly promising energy conversion devices in the past few decades. However, some challenges, such as carbon monoxide (CO) poisoning and unsatisfactory long-term stability, remain for platinum (Pt) as a methanol oxidation reaction (MOR) catalyst. This review covers recent advances in Pt alloy MOR catalysts and provides some insights. This review presents MOR catalytic mechanisms based on CO or non-CO pathways. Typical dimension-based designs of MOR catalysts, such as anisotropic nanowires, metallene, nanoframes, and corresponding rationales for performance enhancements, are introduced. More importantly, some key tuning strategies are elaborated, including intermetallic compound synthesis, interface engineering, and surface facet engineering. High-entropy alloys as an intriguing class of MOR catalysts with favorable prospects are also discussed. Finally, future directions and opportunities are outlined.

show abstract

Section: Dimensional Engineering Of Pt-based Alloys For Mormentioning

confidence: 99%

Platinum Alloys for Methanol Oxidation Electrocatalysis: Reaction Mechanism and Rational Design of Catalysts with Exceptional Activity and Stability

Yu,

Zhang,

Deng

et al. 2024

Catalysts

View full text Add to dashboard Cite

show abstract

“…Previous in situ Raman studies have demonstrated that the reaction pathways for various PGM catalysts can significantly differ [33–35] . Many commercial Pd/C or Pt/C catalysts exhibit relatively low C1 selectivity [36] .…”

Section: In Situ Raman Investigations Of Reaction Pathways For Pgm‐ba...mentioning

confidence: 99%

“…Previous in situ Raman studies have demonstrated that the reaction pathways for various PGM catalysts can significantly differ. [33][34][35] Many commercial Pd/C or Pt/C catalysts exhibit relatively low C1 selectivity. [36] Nonetheless, it is possible to judiciously design a PGM-based catalyst to shift its performance toward the more favorable C1À 12e À pathway.…”

Section: In Situ Raman Investigations Of Reaction Pathways For Pgm-ba...mentioning

confidence: 99%

Mechanistic Investigations of Electrochemical Ethanol Oxidation Reaction by In Situ Raman Spectroscopy

Xu,

Wang

2023

ChemElectroChem

View full text Add to dashboard Cite

The Electrochemical Ethanol Oxidation Reaction (EOR) plays a pivotal role in next‐generation energy conversion devices. A clear understanding of the EOR reaction mechanism is critical for rational catalyst design, a task complicated by the numerous reaction intermediates and pathways involved. To this end, in situ Raman spectroscopy has proven invaluable in identifying many such intermediates at the electrode/electrolyte interface under varying applied potentials. Therefore, this technique allows for inference of the reaction mechanism based on the detected Raman signals of intermediates and observed structural changes, positioning in situ Raman spectroscopy as one of the most suitable methods for studying the EOR reaction mechanism. In this short review, with an eye towards future applications, we concentrate on the essential fundamentals of EOR and highlight recent advancements in understanding the EOR mechanism by in situ Raman spectroscopy.

show abstract

“…[14,15] However, there are few reports regarding NbN-based catalysts towards alkaline EOR, especially on the ability to break the C-C bonds. In addition, doping the oxygen-ophilic metals is also an effective strategy to improve the anti-poisoning ability of electrocatalysts for EOR, which can enhance the adsorption of OH and further promote the oxidative removal of CO. [16] In our previous work, we reported PdSn-TaN/C for alkaline MOR, which can provide more efficient surface interface active sites, thereby improving MOR catalytic performance. [7] Nevertheless, EOR exhibits a more complex and slower oxidation process than MOR, and the reaction process involves the decomposition and splitting of C-C. [17] Combined with the previous research, TMNs are expected to break the C-C bonds of ethanol in alkaline media through interfacial sites, and the oxidation rate of CO-like intermediates is increased by doping with the oxyphilic metals.…”

Section: Introductionmentioning

confidence: 99%

Interfacial Electron Engineering of PdSn‐NbN/C for Highly Efficient Cleavage of the C–C Bonds in Alkaline Ethanol Electrooxidation

Ye,

Sheng,

Zhang

et al. 2023

Small

View full text Add to dashboard Cite

The splitting of the C–C bonds of ethanol remains a key issue to be addressed, despite tremendous efforts made over the past several decades. This study highlights the enhancement mechanism of inexpensive NbN‐modified Pd1Sn3‐NbN/C towards the C–C bonds cleavage for alkaline ethanol oxidation reaction (EOR). The optimal Pd1Sn3‐NbN/C delivers a catalytic activity up to 43.5 times higher than that of commercial Pd/C and high carbonate selectivity (20.5%) toward alkaline EOR. Most impressively, the Pd1Sn3‐NbN/C presents good durability even after 25 200 s of chronoamperometric testing. The enhanced catalytic performance is mainly due to the interfacial interaction between PdSn and NbN, demonstrated by multiple structural characterization results. In addition, in situ ATR‐SEIRAS (Attenuated total reflection‐surface enhanced infrared absorption spectroscopy) results suggest that NbN facilitates the C–C bonds cleavage towards the alkaline EOR, followed by the enhanced OH adsorption to promote the subsequent oxidation of C1 intermediates after doping Sn. DFT (density functional theory) calculations indicate that the activation barriers of the C–H bond cleavage in CH3CH2OH, CH3CHOH, CH3CHO, CH3CO, CH2CO, and the C–C bond cleavage in CH3CO, CH2CO, CHCO are evidently reduced and the removal of adsorbed CH3CO and CO becomes easier on the PdSn‐NbN/C catalyst surface.

show abstract

Multiple strategies of porous tetrametallene for efficient ethanol electrooxidation

Abstract: The first synthesized porous Pd59W8Rh19Bi14 metallene combines OH adsorption effects, electronic effects and C–C bond cleavage site strategies to improve EOR performance. The metallene stable structure further accelerates the mass transfer rate.

Cited by 7 publications

References 57 publications

Platinum Alloys for Methanol Oxidation Electrocatalysis: Reaction Mechanism and Rational Design of Catalysts with Exceptional Activity and Stability

Platinum Alloys for Methanol Oxidation Electrocatalysis: Reaction Mechanism and Rational Design of Catalysts with Exceptional Activity and Stability

Mechanistic Investigations of Electrochemical Ethanol Oxidation Reaction by In Situ Raman Spectroscopy

Interfacial Electron Engineering of PdSn‐NbN/C for Highly Efficient Cleavage of the C–C Bonds in Alkaline Ethanol Electrooxidation

Contact Info

Product

Resources

About