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Updated: Jun 28, 2025

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在氧化物演化反应过程中,Mn-Bi₂O₃从Mn-doped Bi₃O₄Br电气预催化剂演化

Avinava Kundu¹, Ashish Kumar Dhillon¹, Ruchi Singh¹

¹Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, 110016, New Delhi, India. soumik@chemistry.iitd.ac.in.

Dalton transactions (Cambridge, England : 2003)

|April 23, 2024

概括

兴奋剂显著提高了Bi3O4Br在氧化演化反应中的电催化性能. 与原始Bi3O4Br相比,这种Mn-doped材料表现出更好的活性和稳定性,使其成为一个有前途的电催化剂.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
无机化学无机化学

背景情况:

对于催化应用,氧化物 (Bi3O4Br) 正在探索.
未使用的Bi3O4Br具有有限的电催化活性.
研究了兴奋剂策略,以提高材料的性能.

研究的目的:

为了合成和表征Mn-doped Bi3O4Br.Br.的合成和表征.
评估Mn-Bi3O4Br的氧化演化反应 (OER) 的电催化性能.
了解胺兴奋剂在改善OER活动中的作用.

主要方法:

溶解热合成途径为Mn-doped Bi3O4Br.Br 的溶解热合成途径.
粉末X射线衍射 (PXRD) 和X射线光电子光谱 (XPS) 用于结构和化学表征.
电化学技术包括循环电压测量,时测量和电化学阻抗光谱,以评估OER性能.

主要成果:

成功合成了Mn-doped Bi3O4Br,证实了Mn的加入 (7%的doping).
胺兴奋剂减少了带间隙,并引入了缺陷,增强了电子导电.
与原始的Bi3O4Br相比,Mn-Bi3O4Br显示出明显改善的OER活性 (较低的超电位) 和长期稳定性 (12小时).

结论:

对Bi3O4Br的超低Mn注有效地提高了其OER的电催化性能.
改善的活动归因于诸如较低的Tafel斜率,增强的双层电容和减少的电荷传输电阻等因素.
在现场形成的Mn-doped Bi2O3被确定为OER期间的活性物种,突出显示了转化机制.

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