Partially oxidized ruthenium aerogel as highly active bifunctional electrocatalyst for overall water splitting in both alkaline and acidic media

Su, Yan; Liao, Wenying; Zhong, Mengxiao; Li, Weimo; Pinna, Nicola; Chen, Wei; Lu, Xiaofeng

doi:10.1016/j.apcatb.2022.121199

Cited by 49 publications

(23 citation statements)

References 49 publications

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“…The stability of partially oxidized materials such as metals, metal phosphides and metal sulfides under OER conditions has been widely reported. [53][54][55][56][57][58] Then, the deterioration of the BiVO 4 /Bi photocurrent density can be attributed to the anodic photocorrosion of BiVO 4 by accumulation of holes at the surface due to insufficient water oxidation capability. [24,59] The dissolution of BiVO 4 surface has been widely reported, with a BiVO 4 etching rate of ≈1 nm min -1 .…”

Section: Pec Water Oxidationmentioning

confidence: 99%

2D Bismuthene as a Functional Interlayer between BiVO₄ and NiFeOOH for Enhanced Oxygen‐Evolution Photoanodes

Cui

Dabóczi

Regue

et al. 2022

Adv Funct Materials

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BiVO 4 has attracted wide attention for oxygen-evolution photoanodes in water-splitting photoelectrochemical devices. However, its performance is hampered by electron-hole recombination at surface states. Herein, partially oxidized two-dimensional (2D) bismuthene is developed as an effective, stable, functional interlayer between BiVO 4 and the archetypal NiFeOOH co-catalyst. Comprehensive (photo)electrochemical and surface photovoltage characterizations show that NiFeOOH can effectively increase the lifetime of photogenerated holes by passivating hole trap states of BiVO 4 ; however, it is limited in influencing electron trap states related to oxygen vacancies (V O ). Loading bismuthene on BiVO 4 photoanodes increases the density of V O that are beneficial for the oxygen evolution reaction via the formation of oxy/hydroxyl-based water oxidation intermediates at the surface. Moreover, bismuthene increases interfacial band bending and fills the V O -related electron traps, leading to more efficient charge extraction. With the synergistic interaction of bismuthene and NiFeOOH on BiVO 4 , this composite photoanode achieves a 5.8-fold increase in photocurrent compared to bare BiVO 4 reaching a stable 3.4 (±0.2) mA cm -2 at a low bias of +0.8 V RHE or 4.7(±0.2) mA cm -2 at +1.23 V RHE . The use of 2D bismuthene as functional interlayer provides a new strategy to enhance the performance of photoanodes.

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Section: Pec Water Oxidationmentioning

confidence: 99%

2D Bismuthene as a Functional Interlayer between BiVO₄ and NiFeOOH for Enhanced Oxygen‐Evolution Photoanodes

Cui

Dabóczi

Regue

et al. 2022

Adv Funct Materials

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show abstract

“…43,44 Through comparison with the results reported in the literature, it was found that the peak of binding energy at 529.80 eV corresponds to the lattice oxygen in the material, the oxygen that forms MnCo 2 O 4 with Mn and Co. By comparison with the standard C 1s peak (284.6 eV), it can be seen that two characteristic peaks of Co 2p 3/2 and Co 2p 1/2 were observed at 781.8 eV and 797.0 eV. 45 By fitting these two peaks, it was found that the peaks of Co 2p 3/2 and Co 2p 1/2 could be further fitted into two peaks, respectively (Fig. 3c, f and i).…”

Section: Resultsmentioning

confidence: 86%

Construction of Mn_xCo_yO₄/Ti electrocatalysts for efficient bifunctional water splitting

Huang

Jiang

et al. 2022

Dalton Trans.

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“…Also, the OER kinetics mainly depends on the metal-hydroxide bond strength (MÀ OH), it should not be either strong or weak. [36][37][38][39][40] Thus, the choice and the strategy towards the catalyst development play a significant role in the increasing charge transfer kinetics of the water electrolysis. Today, the most consistently effective electrocatalysts involve noble metals, some prominent ones including RuO 2 , and IrO 2 .…”

Section: Electrocatalytic Oxygen Evolution Reaction (Oer) Mechanism W...mentioning

confidence: 99%

Recent Developments in Conductive Polymer‐Based Electro‐/Photoelectrocatalytic Materials for Effective Hydrogen/Oxygen Evolution Reactions: A Review

et al. 2022

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Currently, a substantially greener energy source such as hydrogen fuel cell is an alternative to fossil fuel sources, and much research has been dedicated to achieving highly efficient hydrogen (H2 gas) generation. In this line, electrochemical water splitting that involves hydrogen and oxygen evolution reactions (HER and OER, respectively) is considered to be the greener and most effective hydrogen‐generating procedure with only water as a by‐product. However, in the process of successful OER/HER, it is extremely demanding for electrocatalysts with high activity, stability and cost‐effectiveness for the water splitting process. Herein, the review proposed promising electrocatalysts such as conductive polymers (CPs) with enhanced catalytic effect with the polymer encapsulation of catalytic material that provides an increase in charge transfer kinetics both in OER/HER. Also, the review highlights the OER and HER mechanism of conducting polymers and their effect on the synergism was discussed in detail. Also, the review detailed the reduced overpotentials, importance and enhancement of catalytic efficiency with various polymers reported in both OER and HER. Here, the choice of polymers can matrix with the inorganic active sites to prevent them from aggregation and the water splitting carried out over the electrode surface results in good conductivity to charge transfer from the electrode to the active sites. In addition, the review discussed the polymers induces the photon effect with photoelectrocatalytic water splitting. Thus, the combing effect with conducting polymers and the materials with catalytic active centers open up a new kind of electrocatalyst for synthesis.

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Partially oxidized ruthenium aerogel as highly active bifunctional electrocatalyst for overall water splitting in both alkaline and acidic media

Cited by 49 publications

References 49 publications

2D Bismuthene as a Functional Interlayer between BiVO₄ and NiFeOOH for Enhanced Oxygen‐Evolution Photoanodes

2D Bismuthene as a Functional Interlayer between BiVO₄ and NiFeOOH for Enhanced Oxygen‐Evolution Photoanodes

Construction of Mn_xCo_yO₄/Ti electrocatalysts for efficient bifunctional water splitting

Recent Developments in Conductive Polymer‐Based Electro‐/Photoelectrocatalytic Materials for Effective Hydrogen/Oxygen Evolution Reactions: A Review

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Partially oxidized ruthenium aerogel as highly active bifunctional electrocatalyst for overall water splitting in both alkaline and acidic media

Cited by 49 publications

References 49 publications

2D Bismuthene as a Functional Interlayer between BiVO4 and NiFeOOH for Enhanced Oxygen‐Evolution Photoanodes

2D Bismuthene as a Functional Interlayer between BiVO4 and NiFeOOH for Enhanced Oxygen‐Evolution Photoanodes

Construction of MnxCoyO4/Ti electrocatalysts for efficient bifunctional water splitting

Recent Developments in Conductive Polymer‐Based Electro‐/Photoelectrocatalytic Materials for Effective Hydrogen/Oxygen Evolution Reactions: A Review

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2D Bismuthene as a Functional Interlayer between BiVO₄ and NiFeOOH for Enhanced Oxygen‐Evolution Photoanodes

2D Bismuthene as a Functional Interlayer between BiVO₄ and NiFeOOH for Enhanced Oxygen‐Evolution Photoanodes

Construction of Mn_xCo_yO₄/Ti electrocatalysts for efficient bifunctional water splitting