Enhanced durability and activity of the perovskite electrocatalyst Pr_0.5Ba_0.5CoO_3−δ by Ca doping for the oxygen evolution reaction at room temperature

Abstract

A promising Ca doping approach was reported to improve the durability and electrocatalytic OER activity of the perovskite PrBaCoO (PBC). Compared to the pristine PBC, the electrocatalytic activity of Ca-doped PrBaCaCoO perovskite was increased by ca. 90%. More importantly, its durability was significantly enhanced after doping with calcium.

Modulating Electronic Structures of Inorganic Nanomaterials for Efficient Electrocatalytic Water Splitting

“…[66,68] Meanwhile,the electron redistribution is beneficial to charge transfer on the active sites from the electrode interface to the adsorbed reactants. [30,[69][70][71] In the case of the metal compound based material, doping by the non-noble atoms is one of the most common strategies. Xie et al reported the V-doped MoS 2 with amodified energy band structure ( Figure 4a).…”

“…[70] Some similar results were also observed in the perovskite-type electrocatalysts. [30,71] Noble-metal atom is also used as ad opant to tune catalytic activity.B ao et al reported the Pt-doped MoS 2 with the significant h 10 value decreasing from 390 to 140 mV. [68] Therelated calculated results demonstrated that aseries of defect levels were induced near Fermi level of the in-plane Sa toms,w hich was quite analogical with the DOS of the active edge Sa toms in pure MoS 2 .A saresult, these reconstructed electronic configurations of the Pt-doped MoS 2 reduced the hydrogen adsorption energy from around 1.83 to approximately 0eVa nd consequently boosted the specific activity of HER.…”

Remarkable Oxygen‐Evolution Activity of a Perovskite Oxide from the Ca2−xSrxFe2O6−δ Series

“…The overpotential can be lowered by electrocatalysts, such as IrO 2 and RuO 2 , which show high activity, but their scarcity, high cost and limitations in long‐term stability in alkaline solutions hamper their practical use . Designing inexpensive, earth‐abundant and efficient electrocatalysts with low overpotential, which are stable upon prolonged exposure to oxidizing conditions in alkaline solutions, has been a major challenge ,…”

Modulierung der elektronischen Strukturen anorganischer Nanomaterialien für eine effiziente elektrokatalytische Wasserspaltung

“…[66,68] Zudem fçrdert die Elektronen-Umverteilung den Ladungstransfer an den aktiven Zentren von der Elektrodengrenzschichtz ud en adsorbierten Reaktanten. [30,[69][70][71] FürMaterialien, die auf einer Metallverbindung basieren, ist die Dotierung mit unedlen Atomen eine der häufigsten Strategien. Xie et al berichteten über Va nadium-dotiertes MoS 2 mit einer modifizierten Energiebandstruktur (Abbildung 4a).…”

“…[70] Einige ähnliche Ergebnisse wurden auch fürP erowskit-Typ-Elektrokatalysatoren erhalten. [30,71] Edelmetallatome fanden ebenfalls Verwendung als Dotanden, um die katalytische Aktivitätz u steigern. Bao et al berichteten über Pt-dotiertes MoS 2 ,f ür das der signifikante h 10 -Wert von 390 auf 140 mV abfiel.…”