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研究领域化学科学有机化学自由基化学
通过在Ti₃C₂MXene电催化剂上进行 (氧) 氧化物驱动的表面重建来调节氧进化反应途径

通过在Ti₃C₂MXene电催化剂上进行 (氧) 氧化物驱动的表面重建来调节氧进化反应途径

Nur Aqlili Riana Che Mohamad ¹, Hyunjeong Lee ¹, Mingming Gong ², Caichao Ye ², Yunfei Bu ³, Zhiqun Lin ^1,4, Dong-Il Won ¹, Jeongwon Kim ^1,5, Filipe Marques Mota ⁶, Dong Ha Kim ^1,7,8,9,10

Nur Aqlili Riana Che Mohamad ¹, Hyunjeong Lee ¹, Mingming Gong ²

¹Department of Chemistry and Nanoscience, Division of Molecular and Life Sciences, College of Natural Sciences, Ewha Womans University, 52, Ewhayeodae-gil, Seodaemun-gu, Seoul, 03760, Republic of Korea.
²Academy for Advanced Interdisciplinary Studies & Institute of Innovative Materials, Guangdong Provincial Key Laboratory of Computational Science and Material Design, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, P. R. China.
³School of Environmental Science and Technology, UNIST-NUIST Energy and Environment Jointed Lab, (UNNU), Nanjing University of Information Science & Technology, Pukou, Nanjing, Jiangsu, 210044, P. R. China.
⁴Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, 117585, Singapore.
⁵Department of Chemistry, Northwestern University, Evanston, IL, 60208, USA.
⁶Department of Chemistry, School of Natural Sciences, University of Lincoln, Lincoln, LN6 7TS, UK.
⁷College of Medicine, Ewha Womans University, 25, Magokdong-ro 2-gil, Gangseo-gu, Seoul, 07804, Republic of Korea.
⁸Graduate Program in Innovative Biomaterials Convergence, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul, 03760, Republic of Korea.
⁹Basic Sciences Research Institute (Priority Research Institute), Ewha Womans University, Seoul, 03760, Republic of Korea.
¹⁰Nanobio • Energy Materials Center (National Research Facilities and Equipment Center), Ewha Womans University, Seoul, 03760, Republic of Korea.

⁰Department of Chemistry and Nanoscience, Division of Molecular and Life Sciences, College of Natural Sciences, Ewha Womans University, 52, Ewhayeodae-gil, Seodaemun-gu, Seoul, 03760, Republic of Korea.

Small (weinheim an Der Bergstrasse, Germany) +

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2025年八月22日

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在PubMed上查看摘要

概括

此摘要是机器生成的。

这项研究引入了一种电激活的MXene催化剂,通过通过表面重建促进氧通路机制 (OPM) 来增强氧演变反应 (OER),显著降低过量的电位并增加电流密度.

科学领域

电化学
材料科学
催化剂

背景情况

氧化演化反应 (OER) 对能量转化技术至关重要.
了解OER路径,如吸附物演变 (AEM) 和晶格氧机制 (LOM),是催化剂设计的关键.
氧气通路机制 (OPM) 提供了一个有前途的替代方案,具有容易的O-O合.

研究的目的

引入一个电激活的减少Ti3C2MXene (rTi3C2) 系统来调节OER通路.
研究氧化物种在促进OER活动中的作用.
在工程MXene表面上展示从AEM到OPM的过渡.

主要方法

使用拉曼光谱观察表面物种的现场形成.
电化学测量以评估OER性能 (超电位,电流密度).
第一个原则是验证催化路径和能量障碍的计算.

主要成果

电激活rTi3C2导致 (氧) 氧化物种 (rTi3C2-T) 的形成.
rTi3C2-T系统显示出OER过量的减少27%,电流密度增加67%.
频谱和计算数据证实了转向具有较低能源障碍的OPM途径.

结论

MXenes的电化学表面工程可以有效地促进OPM路径.
富含氧化的rTi3C2-T催化剂显著增强了OER活性.
这项工作突出了通过表面修改设计先进的OER催化剂的策略.

关键词:

没有. 开放式资源 Ti3C2 的使用电催化剂氧化

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相关概念视频

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Alkenes are converted to 1,2-diols or glycols through a process called dihydroxylation. It involves the addition of two hydroxyl groups across the double bond with two different stereochemical approaches, namely anti and syn. Dihydroxylation using osmium tetroxide progresses with syn stereochemistry.

Syn Dihydroxylation Mechanism
The reaction comprises a two-step mechanism. It begins with the addition of osmium tetroxide across the alkene double bond in a concerted manner forming a...

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