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光热CO2化过Ni/g-C催化剂:合成方法对结构,活动和机制的影响

Qiyuan Shi¹, Yuling Liu¹, Zhuoran Wang²

¹State Key Laboratory of Water Engineering Ecology and Environment in Arid Area, Xi'an University of Technology, Xi'an 710048, China.

|September 29, 2025

概括

共同沉积方法增强了/石墨碳化物催化剂,以有效减少二氧化碳. 这种优化的催化剂在光热条件下实现了高一氧化碳产量和选择性,有助于缓解气候变化.

科学领域:

材料科学材料科学材料科学
催化剂是一种催化剂.
环境科学环境科学

背景情况:

不断增加的二氧化碳排放需要先进的催化解决方案来缓解气候变化.
光热催化为高效的CO2转化提供了一个有前途的途径,通过整合光催化和热的优势.
石墨碳化物 (g-C₃N₄) 和 (Ni) 是CO₂还原催化剂的关键组成部分,因为它们的电子特性和催化活性.

研究的目的:

通过不同的方法 (共同沉积,固态浸,共同热解) 制备的Ni/g-C₃N₄催化剂的合成和特征.
评估制备方法对催化剂结构,特性和光热催化CO2化中的性能的影响.
为了阐明最优化CO2转化反应机制.

主要方法:

合成Ni/g-C₃N₄催化剂使用共同沉积,固态浸和共同热解.
使用SEM-EDS,TEM,XRD,FT-IR,BET,CO-TPD,H-TPR,XPS,UV-vis DRS和光电化学分析进行全面的表征.
在光热CO2化中的催化活性评估和使用in situ DRIFTS的机械学研究.

主要成果:

共同沉积方法产生了Ni/g-C₃N₄-CD催化剂,其表面积,孔隙结构和可见光吸收优越.
Ni/g-C₃N₄-CD表现出增强的CO₂吸附,减少能力和高效的光生成载体分离.
优化的催化剂在300°C的光热条件下实现了15937.2μmol·g-1的CO产量和84%的CO选择性.

结论:

制备方法对Ni/g-C₃N₄催化剂结构和在CO₂光热减少中的性能产生重大影响.
共同沉积方法为开发高活性Ni/g-C₃N₄催化剂提供了一个有效的策略.
这项研究为设计先进的支持金属催化剂提供了洞察力,以有效利用CO2.

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