A perovskite oxide with a tunable pore-size derived from a general salt-template strategy as a highly efficient electrocatalyst for the oxygen evolution reaction

Yu, Haoran; Chu, Fuqiang; Zhou, Xiao Yan; Ji, Junling; Liu, Yang; Bu, Yunfei; Kong, Yong; Tao, Yongxin; Li, Yongxin; Qin, Yong

doi:10.1039/c8cc10181g

Cited by 23 publications

(16 citation statements)

References 46 publications

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Section: High‐valence Metal Sitesmentioning

confidence: 99%

“…prepared PrBa 0.5 Sr 0.5 Co 1.5 Fe 0.5 O 5+ δ (PBSCF) with an hierarchically porous structure (surface area: 148 m 2 g −1 ) by the inorganic salt‐template strategy that showed outstanding electrocatalytic performance for the OER in terms of its low onset overpotential, high current density, small Tafel slope, and good stability (Figure 8b). [ 91 ] Additionally, the P‐doping‐induced higher valence states of Fe and Co were favorable for the OER (Figure 8c).…”

Section: High‐valence Metal Sitesmentioning

confidence: 99%

“…[ 167 ] Although perovskite oxides were reported to have high intrinsic activity values toward water oxidation, their surface areas were too low (typically < 2 m 2 g −1 ) to expose sufficient active sites. [ 42a,91,187 ] To increase the mass activity, the use of crystalline perovskite oxides as precursors to prepare amorphous electrocatalysts might be an effective avenue. [ 188 ] Recently, Chen et al.…”

Section: Advanced Water‐splitting Electrocatalysts With High‐valence mentioning

confidence: 99%

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Designing High‐Valence Metal Sites for Electrochemical Water Splitting

Sun

Song

et al. 2021

Adv Funct Materials

254

162

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Electrochemical water splitting is a critical energy conversion process for producing clean and sustainable hydrogen; this process relies on low‐cost, highly active, and durable oxygen evolution reaction/hydrogen evolution reaction electrocatalysts. Metal cations (including transition metal and noble metal cations), particularly high‐valence metal cations that show high catalytic activity and can serve as the main active sites in electrochemical processes, have received special attention for developing advanced electrocatalysts. In this review, heterogenous electrocatalyst design strategies based on high‐valence metal sites are presented, and associated materials designed for water splitting are summarized. In the discussion, emphasis is given to high‐valence metal sites combined with the modulation of the phase/electronic/defect structure and strategies of performance improvement. Specifically, the importance of using advanced in situ and operando techniques to track the real high‐valence metal‐based active sites during the electrochemical process is highlighted. Remaining challenges and future research directions are also proposed. It is expected that this comprehensive discussion of electrocatalysts containing high‐valence metal sites can be instructive to further explore advanced electrocatalysts for water splitting and other energy‐related reactions.

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Section: High‐valence Metal Sitesmentioning

confidence: 99%

Section: High‐valence Metal Sitesmentioning

confidence: 99%

Section: Advanced Water‐splitting Electrocatalysts With High‐valence mentioning

confidence: 99%

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Designing High‐Valence Metal Sites for Electrochemical Water Splitting

Sun

Song

et al. 2021

Adv Funct Materials

254

162

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“…The nanosize effect was also demonstrated by synthesizing hierarchically porous PBSCF by a general inorganic salt‐template strategy ( Figure 6 a). [ 60 ] The hierarchically porous structure facilitated the mass transfer and provided a high surface area (148 m 2 g −1 ), thus exposing more surface‐active sites. Furthermore, the introduction of P, which originated from the K 3 PO 4 template, created Fe and Co with higher valence states, which was also the key factor behind the promoted OER performance.…”

Section: Optimization Strategies For Structurally Ordered Materialsmentioning

confidence: 99%

Section: Optimization Strategies For Structurally Ordered Materialsmentioning

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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