Acid-Stable Oxides for Oxygen Electrocatalysis

Wang, Zhenbin; Zheng, Ya‐Rong; Chorkendorff, Ib; Nørskov, Jens K.

doi:10.1021/acsenergylett.0c01625

Cited by 136 publications

(155 citation statements)

References 22 publications

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“…As a result, some of Sb/Ti/Sn/Ge/Mo/W‐based oxides with better corrosion resistance have been predicted as potential candidates for OER in acid. [ 205 ]…”

Section: Electrocatalysts For Oer In Acidmentioning

confidence: 99%

Recent Development of Oxygen Evolution Electrocatalysts in Acidic Environment

et al. 2021

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a-d) Reproduced with permission. [61] Copyright 2017, Springer Nature. e) Possible OER routes on Zn 0.2 Co 0.8 O 2 with LOM mechanism. [59] Copyright 2019, Springer Nature. f) Scheme representing the proposed OER mechanism on the surface of La 2 LiIrO 6 in acid. Reproduced with permission. [66] Copyright 2016, Nature Publishing Group. g) The mechanism suggested for amorphous iridium oxide and leached perovskites with participation of activated oxygen in the reaction forming oxygen vacancies. Reproduced with permission. [51] Copyright 2018, Springer Nature.

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“…As a result, some of Sb/Ti/Sn/Ge/Mo/W‐based oxides with better corrosion resistance have been predicted as potential candidates for OER in acid. [ 205 ]…”

Section: Electrocatalysts For Oer In Acidmentioning

confidence: 99%

Recent Development of Oxygen Evolution Electrocatalysts in Acidic Environment

et al. 2021

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“…Iridium anchoring to tin-based electrocatalyst supports such as ATO or ITO, however, has been shown to be somewhat compromised by the inherent tin instability within the supports. [41] Simultaneously, the quest of finding alternative acid-stable OER electrocatalyst is ongoing and has recently been assessed by both high-throughput computational methods [42,43] or using various transition metal or complex non-noble metal compounds such as pyrochlores [44] or polyoxometalates. [45]…”

mentioning

confidence: 99%

Electrochemically Decorated Iridium Electrodes with WS₃₋_x Toward Improved Oxygen Evolution Electrocatalyst Stability in Acidic Electrolytes

Escalera‐López

Jensen

Rees

et al. 2021

Advanced Sustainable Systems

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A simple method to do so is via water splitting, which can be driven by renewable energy sources (e.g., solar photovoltaics, wind, hydroelectric) coupled to an electrochemical device such as a water electrolyser. [6] Electrolysers are a well-established technology proven to be extremely robust in alkaline media, with reported lifetimes over 15 years and reasonable conversion efficiencies of >50%. [7,8] Proton exchange membrane electrolysers, which operate in acidic media, on the other hand, have the potential of producing higher purity pressurized hydrogen at increased power densities than in alkaline conditions. [6,9,10] However, its commercial viability is hampered by the catalyst materials employed for the kinetically hindered 4-electron oxygen evolution reaction (OER) taking place at the electrolyser anode. [11][12][13] In particular, the harsh electrochemical environments under which OER electrocatalysts operate severely narrows down the potential candidates to scarce Ir-based electrocatalysts. [14,15] These metals, and to a lesser extent their rutile-type oxide analogues, still undergo electrochemical dissolution during OER operation. [16][17][18] This dissolution is crucial for describing performance losses in PEM water electrolysers. [19,20] It has recently been shown that OER stability is not only highly dependent on their native structure and chemical environment, [21,22] but also on the degree of nanostructuring and surface defects. [23][24][25] Consequently, research into improving Ir catalyst utilization is extensive. Such improvement can be attempted through many different approaches; either by surface area maximization (e.g., nanoframes, [26,27] nanowires, [28] nanodendrites, [29] and self-supported nanostructured networks [30] ), by reducing loadings by use of mixed metal oxides, [31][32][33][34] or by anchoring to corrosion-resistant supports such as ATO [35][36][37][38] or TiO 2 [39,40] to yield stabilizing support interactions. Iridium anchoring to tin-based electrocatalyst supports such as ATO or ITO, however, has been shown to be somewhat compromised by the inherent tin instability within the supports. [41] Simultaneously, the quest of finding alternative acid-stable OER electrocatalyst is ongoing and has recently been assessed by both high-throughput computational methods [42,43] or using various transition metal or complex non-noble metal compounds such as pyrochlores [44] or polyoxometalates. [45] Iridium-based oxides, currently the state-of-the-art oxygen evolution reaction (OER) electrocatalysts in acidic electrolytes, are cost-intensive materials which undergo significant corrosion under long-term OER operation. Thus, numerous researchers have devoted their efforts to mitigate iridium corrosion by decoration with corrosion-resistant metal oxides and/or supports to maximize OER catalyst durability whilst retaining high activity. Herein a one-step, facile electrochemical route to obtain improved IrO x thin film OER stability in acid by decorating with amorphous tungsten sulphide (WS 3−x ...

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“…This descriptor reveals conceptual simplicity, and, at the same time, is easily accessible by DFT calculations. It shall be noted that the notion of V O goes beyond previous descriptors for catalyst stability in the OER, which mainly focused on bulk descriptors [20] or surface energies. [21,22] Therefore, in the optimum case, the application of V O could lead to the identification of potentially stable non-noble metal electrocatalysts for the acidic OER, serving as a promising starting point for experimental activities in the lab.…”

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confidence: 99%

Boosting the Stability of RuO₂ in the Acidic Oxygen Evolution Reaction by Tuning Oxygen‐Vacancy Formation Energies: A Viable Approach Beyond Noble‐Metal Catalysts?

Exner

2020

ChemElectroChem

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RuO2 belongs to the most active electrode materials for the anodic oxygen evolution reaction (OER) within the electrochemical water splitting, such as those encountered in acidic proton‐exchange membrane (PEM) electrolyzers. Despite its large activity, RuO2 faces severe stability issues under the harsh anodic operation conditions. Now, a new strategy has been reported to overcome this bottleneck by tuning the free‐formation energy of oxygen vacancies, which can be achieved by the co‐doping of W and Er into the RuO2 lattice. The resulting W0.2Er0.1Ru0.7O2‐δ electrocatalyst is stable long term in acid and, additionally, reveals remarkable OER activity, about 30 times higher than that of commercial RuO2. The notion of tuning the oxygen‐vacancy formation energy could be a valuable starting point for the development of non‐noble electrocatalysts for the acidic OER with applications in PEM electrolyzers.

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Acid-Stable Oxides for Oxygen Electrocatalysis

Cited by 136 publications

References 22 publications

Recent Development of Oxygen Evolution Electrocatalysts in Acidic Environment

Recent Development of Oxygen Evolution Electrocatalysts in Acidic Environment

Electrochemically Decorated Iridium Electrodes with WS₃₋_x Toward Improved Oxygen Evolution Electrocatalyst Stability in Acidic Electrolytes

Boosting the Stability of RuO₂ in the Acidic Oxygen Evolution Reaction by Tuning Oxygen‐Vacancy Formation Energies: A Viable Approach Beyond Noble‐Metal Catalysts?

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Acid-Stable Oxides for Oxygen Electrocatalysis

Cited by 136 publications

References 22 publications

Recent Development of Oxygen Evolution Electrocatalysts in Acidic Environment

Recent Development of Oxygen Evolution Electrocatalysts in Acidic Environment

Electrochemically Decorated Iridium Electrodes with WS3−x Toward Improved Oxygen Evolution Electrocatalyst Stability in Acidic Electrolytes

Boosting the Stability of RuO2 in the Acidic Oxygen Evolution Reaction by Tuning Oxygen‐Vacancy Formation Energies: A Viable Approach Beyond Noble‐Metal Catalysts?

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Electrochemically Decorated Iridium Electrodes with WS₃₋_x Toward Improved Oxygen Evolution Electrocatalyst Stability in Acidic Electrolytes

Boosting the Stability of RuO₂ in the Acidic Oxygen Evolution Reaction by Tuning Oxygen‐Vacancy Formation Energies: A Viable Approach Beyond Noble‐Metal Catalysts?