Amorphous CoFeB nanosheets with plasmon-regulated dynamic active sites for electrocatalytic water oxidation

Chen, Huayu; Chen, Junxiang; He, He; Chen, Xin; Jia, Chunguang; Chen, Da; Liang, Junhui; Yu, Dandan; Yao, Xin; Qin, Laishun; Huang, Yuexiang; Wen, Zhenhai

doi:10.1016/j.apcatb.2022.122187

“…Roughly half the papers surveyed here did not report investigating the light power density dependence of their plasmonic enhancement effects. [38][39][40][41]47,52,58,58,[75][76][77][78][79][80][81][82][83][84][85][86] A few papers only tested power density effects in a very limited way. [43,75,87] Nonetheless, there are examples of strong linear dependence between photocurrent and power density, [35,42,48,88,89] but also examples of linear reductions in Tafel slopes and required overpotentials, [37,44] which may rather imply an exponential relationship of photocurrent itself to power density.…”

Section: Power Dependencementioning

confidence: 99%

“…Evaluation of changes in selectivity of the reaction under illumination and in the dark under conditions of bulk electrolysis by typical analytical methods (gas chromatography, high-performance liquid chromatography, nuclear magnetic resonance spectroscopy, mass spectrometry, etc.) [42,86,101] to identify the reaction products and their relative yields can be a good way to demonstrate the influence of hot-carriers or possible field effects on the reaction.…”

Section: Experiments To Diagnose the Mechanism Of Enhancementmentioning

confidence: 99%

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Hot or Not? Reassessing Mechanisms of Photocurrent Generation in Plasmon‐Enhanced Electrocatalysis

Bagnall,

Ganguli,

Sekretareva

2023

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It is now widely accepted that certain effects arising from localised surface plasmon resonance, such as enhanced electromagnetic fields, hot carriers, and thermal effects, can facilitate electrocatalytic processes. This newly emerging field of research is commonly referred to as plasmon‐enhanced electrocatalysis (PEEC) and is attracting increasing interest from the research community, particularly regarding harnessing the high energy of hot carriers. However, this has led to a lack of critical analysis in the literature, where the participation of hot carriers is routinely claimed due to their perceived desirability, while the contribution of other effects is often not sufficiently investigated. As a result, correctly differentiating between the possible mechanisms at play has become a key point of contention. In this review, we specifically focus on the mechanisms behind photocurrents observed in PEEC and critically evaluate the possibility of alternative sources of current enhancement in the reported PEEC systems. Furthermore, we present guidelines for the best experimental practices and methods to distinguish between the various enhancement mechanisms in PEEC.

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“…Roughly half the papers surveyed here did not report investigating the light power density dependence of their plasmonic enhancement effects. [38][39][40][41]47,52,58,58,[75][76][77][78][79][80][81][82][83][84][85][86] A few papers only tested power density effects in a very limited way. [43,75,87] Nonetheless, there are examples of strong linear dependence between photocurrent and power density, [35,42,48,88,89] but also examples of linear reductions in Tafel slopes and required overpotentials, [37,44] which may rather imply an exponential relationship of photocurrent itself to power density.…”

Section: Power Dependencementioning

confidence: 99%

Hot or Not? Reassessing Mechanisms of Photocurrent Generation in Plasmon‐Enhanced Electrocatalysis

Bagnall,

Ganguli,

Sekretareva

2023

Angewandte Chemie

0

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It is now widely accepted that certain effects arising from localised surface plasmon resonance, such as enhanced electromagnetic fields, hot carriers, and thermal effects, can facilitate electrocatalytic processes. This newly emerging field of research is commonly referred to as plasmon‐enhanced electrocatalysis (PEEC) and is attracting increasing interest from the research community, particularly regarding harnessing the high energy of hot carriers. However, this has led to a lack of critical analysis in the literature, where the participation of hot carriers is routinely claimed due to their perceived desirability, while the contribution of other effects is often not sufficiently investigated. As a result, correctly differentiating between the possible mechanisms at play has become a key point of contention. In this review, we specifically focus on the mechanisms behind photocurrents observed in PEEC and critically evaluate the possibility of alternative sources of current enhancement in the reported PEEC systems. Furthermore, we present guidelines for the best experimental practices and methods to distinguish between the various enhancement mechanisms in PEEC.

show abstract

“…Over the past years, considerable efforts have been devoted toward addressing the sluggish kinetics of the electron transfer reaction in both the cathodic hydrogen evolution reaction (HER) and anodic oxygen evolution reaction (OER). The latter, involving a four-electron transfer reaction, presents a significant bottleneck. − Therefore, corresponding strategies mainly focus on optimizing the intrinsic OER activity of the active site by regulating the adsorption energies of intermediates (e.g., OH*, O*, and OOH*), while also increasing the number of active sites . Recently, two-dimensional (2D) materials, particularly WS 2 , have sparked considerable attention, due to their plentifully exposed reaction sites stemming from their ultrahigh specific surface area. − Besides, the excellent electronic conductivity and short electron transfer distance contribute to their electrocatalytic performance.…”

Section: Introductionmentioning

confidence: 99%

Amorphous Ni–Fe Phosphide @ 2D WS₂ as Bifunctional Electrocatalyst for Unassisted Solar-Driven Overall Water Splitting

Zhang,

Liang,

Luo

et al. 2023

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Utilizing solar-cell-assisted water splitting has emerged as a promising strategy for producing clean hydrogen energy and addressing the energy crisis. Nevertheless, the efficiency of solar to hydrogen (STH) remains hindered by the sluggish reaction kinetics of the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). Two-dimensional (2D) WS 2 , while featuring abundant exposed reaction sites, suffers from inadequate intrinsic activity, limiting its practical application. In this work, we develop an innovative covalent doping approach to modify the electronic structure and adjust the free-energy barrier from O* to OOH* by growing amorphous Ni−Fe phosphide on WS 2 nanosheets (NSs). Consequently, the overpotentials for the OER and HER at 10 mA/cm 2 are reduced by 7% and 15%, respectively, in comparison to pure Ni−Fe phosphide. Furthermore, the bifunctional electrocatalyst, Ni−Fe phosphide @ WS 2 , can deliver a current density of 10 mA/cm 2 at a low voltage of 1.67 V. When coupled with an a-Si:H/a-SiGe:H/a-SiGe:H triple-junction solar cell, it attains a substantial STH efficiency of 8.49%.

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Amorphous CoFeB nanosheets with plasmon-regulated dynamic active sites for electrocatalytic water oxidation

Cited by 22 publications

References 45 publications

Hot or Not? Reassessing Mechanisms of Photocurrent Generation in Plasmon‐Enhanced Electrocatalysis

Hot or Not? Reassessing Mechanisms of Photocurrent Generation in Plasmon‐Enhanced Electrocatalysis

Hot or Not? Reassessing Mechanisms of Photocurrent Generation in Plasmon‐Enhanced Electrocatalysis

Amorphous Ni–Fe Phosphide @ 2D WS₂ as Bifunctional Electrocatalyst for Unassisted Solar-Driven Overall Water Splitting

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Amorphous CoFeB nanosheets with plasmon-regulated dynamic active sites for electrocatalytic water oxidation

Cited by 22 publications

References 45 publications

Hot or Not? Reassessing Mechanisms of Photocurrent Generation in Plasmon‐Enhanced Electrocatalysis

Hot or Not? Reassessing Mechanisms of Photocurrent Generation in Plasmon‐Enhanced Electrocatalysis

Hot or Not? Reassessing Mechanisms of Photocurrent Generation in Plasmon‐Enhanced Electrocatalysis

Amorphous Ni–Fe Phosphide @ 2D WS2 as Bifunctional Electrocatalyst for Unassisted Solar-Driven Overall Water Splitting

Contact Info

Product

Resources

About

Amorphous Ni–Fe Phosphide @ 2D WS₂ as Bifunctional Electrocatalyst for Unassisted Solar-Driven Overall Water Splitting