2022年9月1日 · In this study, operando soft X-ray absorption spectroscopy (SXAS) is used to explore the electronic structure of Co 3 O 4 under OER for the first time. The defect-rich Co 3 O 4 (D-Co 3 O 4 ) has a Co 2.45+ state with Co 2+ at both octahedral (O h ) and tetrahedral (T d ) sites and Co 3+ at O h , whereas Co 3 O 4 has Co 2.6+ with Co 2+ and Co 3 ...

本研究首次利用原位软X射线吸收光谱（SXAS）探索OER下Co 3 O 4 的 电子结构。 富缺陷的 Co 3 O 4 (D-Co 3 O 4) 具有 Co 2.45+ 态，Co 2+ 在八面体 (O h) 和四面体 (T d) 位置，Co 3+ 在 O h ，而 Co 3 O 4 在T d 和O h 位点分别具有Co 2.6+ 和Co 2+ 和Co 3+ 。

In this paper, we reviewed the catalytic oxidation mechanism, microstructure regulation mechanism, and methods of nano-Co3O4 on methane gas, which provides reference for the development of high...

2022年9月8日 · In this study, operando soft X-ray absorption spectroscopy (SXAS) is used to explore the electronic structure of Co 3 O 4 under OER for the first time. The defect-rich Co 3 O 4 (D-Co 3 O 4 ) has a Co 2.45+ state with Co 2+ at both octahedral (O h ) and tetrahedral (T d ) sites and Co 3+ at O h , whereas Co 3 O 4 has Co 2.6+ with Co 2+ and Co 3 ...

2016年12月1日 · Co 3 O 4 is a promising catalyst for removing CO from H 2 streams via the preferential CO oxidation (PROX). A Mars-van-Krevelen redox mechanism is often suggested but a detailed knowledge especially of the oxidation state of the catalytically active surface under reaction conditions is typically missing.

2020年6月14日 · Co 3 O 4 with rich oxygen vacancy (V O) has been reported to efficiently catalyze OER. Herein, we constructed pure spinel Co 3 O 4 and V O -rich Co 3 O 4 as catalyst models to study the defect mechanism and investigate the dynamic behavior of defect sites during the electrocatalytic OER process by various operando characterizations.

2024年4月29日 · 基于同步辐射的软X射线吸收谱（soft X-ray Absorption Spectroscopy，sXAS）具有元素选择性，对TM的价态、自旋态、轨道排列等电子结构极其敏感，因此是研究TM基化合物电子结构的重要手段之一[5]。

Compared with pristine (111), the newly formed Co3O4 surface exhibits more active sites, which accelerates the following oxygen reduction and oxygen evolution processes.

Co 3 O 4是用于通过优先CO氧化（PROX）从H 2流中除去CO的有前途的催化剂。 通常建议采用Mars-van-Krevelen氧化还原机理，但通常缺少对反应条件下催化活性表面氧化态的详细了解。 因此，我们利用操作X射线吸收光谱法检查了PROX期间的结构和氧化态，以及在低光电子动能下接近大气压XPS的情况，从而检查了表面敏感度的高表面敏感性。 纯CO的表面还原非常容易（已经从〜100°C开始）和O 2易于再氧化这表明分子吸附的CO与晶格氧反应，晶格氧由气相O 2补 …

The Journal of Physical Chemistry Letters has published an article about a study in which operando soft X-ray absorption spectroscopy (SXAS) is used to explore the electronic structure of Co3O4 under oxygen evolution reaction (OER).