2023年1月18日 · Dynamic reconstruction of catalyst active sites is particularly important for metal oxide-catalyzed oxygen evolution reaction (OER). However, the mechanism of how vacancy-induced reconstruction aids OER remains ambiguous.

2022年12月14日 · The OER performances of Ir-Co 3 O 4 and as-prepared Co 3 O 4 in 0.5 M H 2 SO 4 were investigated on glassy carbon electrode (GCE) together with the commercial IrO 2 and commercial Co 3 O 4...

4 天之前 · Reasonably, the same pattern also occurs in the results under alkaline conditions, where the Tafel slope of 8-Ru-Co 3 O 4 /Ti is 68.3 mV dec −1, which is much lower than those of the control group, suggesting the fast kinetics of the OER. 45 To determine the oxygen precipitation efficiency during the OER process, the device shown in Figure ...

2024年9月5日 · We found that Er–Co 3 O 4 with 4% Er exhibited an OER overpotential of 321 ± 5 mV at a current density of 10 mA cm –2, maintaining good stability under operating conditions over 250 h. This performance surpasses that of most reported precious metal-free catalysts and is comparable to certain noble Ir-containing catalysts.

2025年1月14日 · Recently explored Co3O4 shows good activity and stability toward oxygen evolution reaction (OER) in acid; however, the stability is not adequately explained. Lack of such information delays the design of an acid-stable OER electrocatalyst.

2017年1月30日 · Herein, we fabricated three-dimensional (3D) highly ordered mesoporous Pd-Co3O4 composite materials as excellent electrocatalysts for OER in alkaline solution with high activity and stability.

2024年4月22日 · Constructing electrocatalysts for the oxygen evolution reaction (OER) is crucial for advancing renewable energy systems. In this study, the OER performances of Ir-doped Co3O4 with (100), (110), and (311) surfaces using first-principles calculations.

2 天之前 · Herein, using the electrocatalytic OER as a model, the OER performance of (R–COO) x σ-Co 3 O 4−x in a 1.0 M KOH solution was evaluated using σ-Co 3 O 4−x, Co 3 O 4 and commercial RuO 2 as ...

2025年2月17日 · The dopant Ni atoms modulate the *OH coverage on the surface to facilitate the deprotonation process and promote the coordinated steps of OER, which are beneficial for accelerating the OER kinetics. This work not only develops an efficient noble metal-free electrocatalyst for acidic OER but also proposes a fundamental insight into modulating ...

2024年12月20日 · 有鉴于此，哈佛大学Daniel G. Nocera等报道以La3+修饰的Co3O4表明金属离子掺杂增强电催化OER性能的机理。 本文要点： （1） 通过粉末XRD表征、Raman光谱、EXAFS表征，揭示La修饰Co3O4导致降低长程有序，增加无定形。 通过原位表征发现这种情况导致晶格损坏变得更加剧烈。 增加La3+的浓度导致OER过电势降低，当La的量达到17 %，取得最高的活性。 HRTEM表征和电子衍射图样清楚的表明OER催化反应过程中形成无定形覆盖层，当催化剂加 …