Double perovskite PrBaCo2O5.5: An efficient and stable electrocatalyst for hydrogen evolution reaction

Sun, Qi; Dai, Ziyang; Zhang, Zhenbao; Chen, Zilong; Lin, Haoqing; Gao, Yang; Chen, Dengjie

doi:10.1016/j.jpowsour.2019.04.070

Cited by 63 publications

(24 citation statements)

References 33 publications

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“…[ 50 , 51 ] The oxygen deficient perovskite shows superior activity and durability toward HER than pristine perovskite due to the increased oxygen defects, high‐degree of structure distortion and appropriate hydrogen absorption ability. [ 44 , 52 , 53 ] As the partial substitution of nickel with low‐valent copper and the annealing process in Ar, more oxygen vacancies may be formed in the crystalline lattice and attributed to the superior activities of LNCO55‐Ar. In order to determine the existence of oxygen vacancies, simultaneous thermal analysis (STA) analyses of LNCO55‐Air and LNCO55‐Ar were conducted.…”

Section: Resultsmentioning

confidence: 99%

An Efficient Symmetric Electrolyzer Based On Bifunctional Perovskite Catalyst for Ammonia Electrolysis

Zhang

Duan

et al. 2021

Advanced Science

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Ammonia is a natural pollutant in wastewater and removal technique such as ammonia electro-oxidation is of paramount importance. The development of highly efficient and low-costing electrocatalysts for the ammonia oxidation reaction (AOR) and hydrogen evolution reaction (HER) associated with ammonia removal is subsequently crucial. In this study, for the first time, the authors demonstrate that a perovskite oxide LaNi 0.5 Cu 0.5 O 3-𝜹 after being annealed in Ar (LNCO55-Ar), is an excellent non-noble bifunctional catalyst towards both AOR and HER, making it suitable as a symmetric ammonia electrolyser (SAE) in alkaline medium. In contrast, the LNCO55 sample fired in air (LNCO55-Air) is inactive towards AOR and shows very poor HER activity. Through combined experimental results and theoretical calculations, it is found that the superior AOR and HER activities are attributed to the increased active sites, the introduction of oxygen vacancies, the synergistic effect of B-site cations and the different active sites in LNCO55-Ar. At 1.23 V, the assembled SAE demonstrates ≈100% removal efficiency in 2210 ppm ammonia solution and >70% in real landfill leachate. This work opens the door for developments towards bifunctional catalysts, and also takes a profound step towards the development of low-costing and simple device configuration for ammonia electrolysers.

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Section: Resultsmentioning

confidence: 99%

An Efficient Symmetric Electrolyzer Based On Bifunctional Perovskite Catalyst for Ammonia Electrolysis

Zhang

Duan

et al. 2021

Advanced Science

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“…evaluated the effect of the crystal structure on the HER activity. [ 77 ] The cubic single perovskite Pr 0.5 Ba 0.5 CoO 3‐ δ (PBC‐900 and PBC‐1000), the orthorhombic double perovskite PrBaCo 2 O 5+ δ (δ = ≈0.52, PBC‐1100), and the tetragonal double perovskite PrBaCo 2 O 5+ δ (δ = ≈0.76, PBC‐1150) were synthesized by simply altering the annealing temperatures ( Figure 8 a). Impressively, PBC‐1100 exhibited the best HER activities in terms of the mass activity, intrinsic activity, and overpotential at 10 mA cm −2 (Figure 8b).…”

Section: Applications Of Structurally Ordered Materials In Electrocatalysismentioning

confidence: 99%

“…Reproduced with permission. [ 77 ] Copyright 2019, Elsevier. e) Crystal structures of the RBaCo 2 O 5.5 (oxygen vacancy ordered without high‐valence metal sites) and RBaCo 2 O 5.75 (oxygen vacancy ordered with high‐valence metal sites), as well as, RBaCo 2 O 6 (no oxygen vacancies).…”

Section: Applications Of Structurally Ordered Materials In Electrocatalysismentioning

confidence: 99%

Recent Progress on Structurally Ordered Materials for Electrocatalysis

Sun

Song

et al. 2021

Advanced Energy Materials

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Tuning material properties by modulation of the arrangement of atoms is a fundamental and effective strategy in materials science. Structurally long‐range ordered materials are increasingly finding utility for electrocatalytic applications. Such ordered structures can achieve unique functions that increase the electrocatalytic activity compared to corresponding electrocatalysts with a disordered structure. Effective strategies for designing high‐performance electrocatalysts based on structurally ordered materials are presented. This review also summarizes the recent progress on structurally ordered materials as efficient electrocatalysts and highlights the applications in several representative electrochemical reactions, such as, the oxygen evolution reaction, oxygen reduction reaction, and hydrogen evolution reaction. The structural features of the atomic long‐range ordered framework and superior electrochemical performance are demonstrated by advanced characterization techniques (structural identification) and electrochemical measurements (performance evaluations), respectively. Special attention is paid to the establishment of a structure‐activity relationship to highlight the advantages of the ordered structure. Finally, the remaining challenges and emerging opportunities in these related materials are proposed.

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“…The reason of existence of the O‐p band centre at a certain distance from the fermi level is to create a special layered structure, responsible for significant activity and stability of perovskites. Grimaud et al 139 worked on double perovskites, considering LnBaCo 2 O 5 + δ (Ln = Pr, Sm, Gd and Ho) and found PrBaCo 2 O 5 + δ (PBC) to be the most active and stable OER catalyst, whereas Sun et al 130 presented PrBaCo 2 O 5.5 orthorhombic perovskite highly active for HER, shown in Table 3. Most recently Shao et al 67 worked in a similar area, where, multi‐active sites are introduced in order to develop the optimal binding for intermediates following the shortest reaction path.…”

Section: Review Of Perovskite Catalysts For Oer/orr and Hersmentioning

confidence: 99%

Role of perovskites as a bi‐functional catalyst for electrochemical water splitting: A review

et al. 2020

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The electrochemical water splitting by using renewable electricity is being considered as a sustainable, clean and considerable source of hydrogen fuel for future transportation and energy applications. The sluggish kinetics at anode and cathode, thus, require plenty of research work on the development of an efficient and stable electrocatalyst, which would provide the enhanced activity of water splitting reaction as well as stability for long-term operation. This review draws a detailed sketch of the progress in the pursuit of replacing noble metals with non-precious perovskite-based substitutes without compromising the key electrocatalyst characteristics. Herein, we critically analysed the latest research work and progress of perovskite oxides for anodic/oxygen reduction reaction/cathodic, including the mechanism behind perovskite oxide catalytic reactions, controlled composition as well as the role of various design strategies to achieve high catalytic performance. Moreover, the article also provides an insight to the associated density functional theory that can provide profound understanding of mechanism, involved behind these reactions and, the need for computational studies to exploit the active area of catalysts. It is believed that this article will assist researchers to explore key area of research in the current generation perovskites that show enhanced catalytic performance as well as to work on unforeseen challenges.

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Double perovskite PrBaCo2O5.5: An efficient and stable electrocatalyst for hydrogen evolution reaction

Cited by 63 publications

References 33 publications

An Efficient Symmetric Electrolyzer Based On Bifunctional Perovskite Catalyst for Ammonia Electrolysis

An Efficient Symmetric Electrolyzer Based On Bifunctional Perovskite Catalyst for Ammonia Electrolysis

Recent Progress on Structurally Ordered Materials for Electrocatalysis

Role of perovskites as a bi‐functional catalyst for electrochemical water splitting: A review

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