Anionic defect engineering of transition metal oxides for oxygen reduction and evolution reactions

Zhu, Yunmin; Liu, Xi; Jin, Shiguang; Chen, Huijun; Lee, Won Young; Liu, Meilin; Chen, Yan

doi:10.1039/c8ta12477a

Cited by 276 publications

(154 citation statements)

References 190 publications

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“…The most commonly used noble metal-based OER catalysts (i.e., RuO 2 and IrO 2 ) may not be appropriate for the large-scale applications owing to their high cost and poor stability. Transition metal oxides have potential to replace noble metal catalysts due to their low cost and high stability 1,[8][9][10] . However, in order to meet the increasingly demanding requirements for practical applications, the catalytic activity of transition metal oxides needs to be further improved.…”

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

et al. 2020

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“…14,15 At present, the most outstanding electrocatalysts for the ORR and OER are precious metal materials, such as Pt/C for the ORR and RuO 2 /IrO 2 for the OER. 16,17 However, the high costs, low natural reserves, singlereaction catalytic activity, and poor durability of noble metals hampered their widespread application. [18][19][20] Therefore, it is important and urgent to develop efficient, durable, and low-cost bifunctional electrocatalysts for the ORR and OER.…”

Section: Introductionmentioning

confidence: 99%

Metal–organic framework based bifunctional oxygen electrocatalysts for rechargeable zinc–air batteries: current progress and prospects

Cui

Yin

et al. 2020

Chem. Sci.

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“…In TMOs, various types of defects, including lattice defects, vacancies, and unsaturated coordination sites, could act as active sites in electrocatalytic reactions. [36] In order to introduce defects in TMOs, scientists have developed different methods to construct defects in TMOs and explored their potential applications in energy-related fields. [37,38] In this review, we focus on recent progress on defectrich TMOs and their applications in electrocatalysis, such as HER, OER and ORR, and energy conversion/storage devices ( Figure 1).…”

Section: Introductionmentioning

confidence: 99%

Recent Progress on Defect‐rich Transition Metal Oxides and Their Energy‐Related Applications

Wang

Liang

Zheng

et al. 2020

Chemistry An Asian Journal

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The applications of many energy-related electrochemical energy conversion and storage devices are changing with each passing day. Oxygen evolution reaction (OER), hydrogen evolution reaction (HER) and oxygen reduction reaction (ORR) are the key steps in the commercial application of these energy conversion/storage equipment. Defect-rich transition metal oxides (TMOs), such as Co, Mn, Fe, Ni, etc., have always been one of the most promising electrocatalysts, which are cheap, easy to obtain, high in catalytic activity and stable during electrocatalysis. In this review, we first introduce the definition, classification, characteristics, and construction of defects. Then, the latest developments of defect-rich TMO electrocatalysts in electro-catalysis and energy conversion storage device is summarized. Furthermore, the relationship between defects and activity and the potential mechanism are also discussed. The defects in defect-rich TMOs can adjust the surface/interface electronic structure of the electrocatalyst, change the adsorption energy of the intermediate product, or increase the intrinsic catalytic activity of active sites, which are beneficial for enhanced catalytic performance. Finally, the current challenges and prospects of defect-rich TMO electrocatalysts are proposed. Therefore, the introduction of defects in TMO will be a potential strategy for the rational design of high-performance electrocatalysts in the future.

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Anionic defect engineering of transition metal oxides for oxygen reduction and evolution reactions

Abstract: Techniques for anionic defect engineering in transition metal oxides and mechanisms of how anion defects affect their oxygen reaction activities.

Cited by 276 publications

References 190 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

Metal–organic framework based bifunctional oxygen electrocatalysts for rechargeable zinc–air batteries: current progress and prospects

Recent Progress on Defect‐rich Transition Metal Oxides and Their Energy‐Related Applications

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