Mixed protonic-electronic conducting perovskite oxide as a robust oxygen evolution reaction catalyst

Liu, Hong; Yu, Jie; Sunarso, Jaka; Zhou, Chuan; Liu, Bo; Shen, Yujuan; Zhou, Wei; Shao, Zongping

doi:10.1016/j.electacta.2018.06.073

Cited by 24 publications

(24 citation statements)

References 44 publications

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“…When the deprotonation processes are strongly coupled with an electron transfer, its OER kinetics shows little dependence on the pH value of a solution (vs. RHE), leading to a low ρ RHE value. It was reported that LaCoO 3 follows the concerted proton-electron transfer process 14,15,38 . In contrast, if the deprotonation process is involved in the PDS along with decoupling of the electron transfer process, the OER kinetics depends strongly on pH with a larger ρ RHE value.…”

Section: Resultsmentioning

confidence: 99%

“…In contrast, if the deprotonation process is involved in the PDS along with decoupling of the electron transfer process, the OER kinetics depends strongly on pH with a larger ρ RHE value. For instance, it was observed that various mixed ionic-electronic conductors (MIECs) (i.e., =La 0.5 Sr 0.5 CoO 3 and Pr 0.5 Ba 0.5 CoO 3 ) have lattice oxygen participation in the OER, leading to a decoupled proton-electron transfer process in OER and a strong pH dependence 15,17,38,39 .…”

Section: Resultsmentioning

confidence: 99%

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Tuning proton-coupled electron transfer by crystal orientation for efficient water oxidization on double perovskite oxides

et al. 2020

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Developing highly efficient and cost-effective oxygen evolution reaction (OER) electrocatalysts is critical for many energy devices. While regulating the proton-coupled electron transfer (PCET) process via introducing additive into the system has been reported effective in promoting OER activity, controlling the PCET process by tuning the intrinsic material properties remains a challenging task. In this work, we take double perovskite oxide PrBa 0.5 Sr 0.5 Co 1.5 Fe 0.5 O 5+δ (PBSCF) as a model system to demonstrate enhancing OER activity through the promotion of PCET by tuning the crystal orientation and correlated proton diffusion. OER kinetics on PBSCF thin films with (100), (110), and (111) orientation, deposited on single crystal LaAlO 3 substrates, were investigated using electrochemical measurements, density functional theory (DFT) calculations, and synchrotron-based near ambient X-ray photoelectron spectroscopy. The results clearly show that the OER activity and the ease of deprotonation depend on orientation and follow the order of (100) > (110) > (111). Correlated with OER activity, proton diffusion is found to be the fastest in the (100) film, followed by (110) and (111) films. Our results point out a way of boosting PCET and OER activity, which can also be successfully applied to a wide range of crucial applications in green energy and environment.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Tuning proton-coupled electron transfer by crystal orientation for efficient water oxidization on double perovskite oxides

et al. 2020

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“…Furthermore, the lower pH dependency of perovskite catalysts may be beneficial to the performance of pure water-fed AEMWEs. [118][119][120] Another approach is to use polymer electrolytes with less adsorption energy of phenyl groups. Quaternized polyolefins have lower adsorption energy than quaternized polyaromatics.…”

Section: Durability-limiting Factor Of Pure Water-fed Aemwesmentioning

confidence: 99%

Durability of anion exchange membrane water electrolyzers

Motz

Bae

et al. 2021

Energy Environ. Sci.

275

263

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“…Such a low overpotential is comparable to the state‐of‐the‐art OER catalysts such as IrO 2 , RuO 2 and transition metal based catalysts . The OER parameters of typical catalysts in 1.0 mol L −1 KOH are listed in Table . This result indicates the possibility of designing highly active OER photo‐responsive electrocatalysts with earth‐abundant non‐metallic elements.…”

Section: Resultsmentioning

confidence: 70%

In situ construction of hierarchical graphitic carbon nitride homojunction as robust bifunctional photoelectrocatalyst for overall water splitting

Luo

Zhang

Han

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND: Sustainable production of oxygen and hydrogen via catalyst-aided water splitting utilizing solar energy has attracted increasing interest. The primary issue in this field is the development of earth-abundant and active photoelectrocatalytic materials. Herein, a novel hierarchical g-C 3 N 4 /g-C 3 N 4 metal-free homojunction catalyst is synthesized through partial hydrolysis of melamine in alkali and subsequent thermal treatment.RESULTS: The hierarchical g-C 3 N 4 /g-C 3 N 4 metal-free homojunction composed of lamellas features large exposed surface area, abundant interface contact and more channels for mass transfer, making it highly effective for water splitting with a small overpotential of 500 mV at 10 mA cm −2 and low Tafel slope of 93.1 mV dec −1 for oxygen evolution reaction (OER) in 1.0 mol L −1 potassium hydroxide (KOH) solution, as well as 259 mV at 10 mA cm −2 and 109.33 mV dec −1 for hydrogen evolution reaction (HER) in 0.5 mol L −1 sulfuric acid (H 2 SO 4 ) solution. Furthermore, the overpotential and Tafel slope further decrease to 383.4 mV and 69.52 mV dec −1 for OER, 150.1 mV and 67.93 mV dec −1 for HER upon visible light irradiation, demonstrating the exceptional photo-responsive catalytic performance, which can be attributed to the direct Z-scheme homojunction resulting in effective charge transfer and •OH and superoxide free radicals produced under visible light irradiation.CONCLUSION: This work provides a facile but effective approach for the construction of metal-free OER/HER bifunctional catalyst with high photo-responsive performance, achieving higher activity for catalyst-assisted water splitting.

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Mixed protonic-electronic conducting perovskite oxide as a robust oxygen evolution reaction catalyst

Cited by 24 publications

References 44 publications

Tuning proton-coupled electron transfer by crystal orientation for efficient water oxidization on double perovskite oxides

Tuning proton-coupled electron transfer by crystal orientation for efficient water oxidization on double perovskite oxides

Durability of anion exchange membrane water electrolyzers

In situ construction of hierarchical graphitic carbon nitride homojunction as robust bifunctional photoelectrocatalyst for overall water splitting

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