激光促进氧气空隙在合金中通过Mo产生HMF电化学氧化
Junbo Liu1, Shengyang Tao1,2,3
1School of Chemistry, Dalian University of Technology, Dalian, 116024, China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|July 24, 2023
概括
这项研究引入了一种新的- (Ni-Mo) 合金催化剂,用于5 - 基甲基酸氧化反应 (HMFOR). 使用紫外线激光制备的催化剂由于氧气空缺而表现出增强的活性和稳定性,改善了基于的电催化.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
背景情况:
- 基催化剂,特别是NiOOH,对5-基甲基醇氧化 (HMFOR) 有效.
- 在成本和催化剂耐用性方面仍然存在挑战.
- 开发稳定高效的HMFOR电催化剂对于生物质转化至关重要.
研究的目的:
- 为了提高基催化剂的电催化活性和稳定性,用于HMFOR.
- 研究 (Mo) 和氧空缺在NiOOH形成和HMFOR性能中的作用.
- 开发一种使用紫外线激光处理的具有成本效益和耐用性的催化剂.
主要方法:
- 使用紫外线激光 (1J85-激光器) 合成Ni-Mo合金催化剂.
- 用于分析Ni-Mo相互作用和协调环境的X射线吸收细结构 (XAFS).
- 密度函数理论 (DFT) 用于研究缺陷能量和氧空隙形成.
- 现场拉曼电化学光谱仪用于监测NiOOH形成和反应动力学.
主要成果:
- XAFS 证实了 Mo-Ni 相互作用,改变了 Ni-O 协调,并显示了 0 到 2 之间的 Ni 价值,表示氧气空缺.
- DFT的计算表明,Mo的加入增加了缺陷能量,促进了氧气空缺的形成.
- 现场拉曼光谱显示Mo增强了NiOOH的形成,促进了HMFOR的活动.
- 经过1J85激光处理的电极表现出优越的电催化寿命,并在15个循环后实现了95.92%的HMF转换.
结论:
- 在合金中加入有效地产生氧气空缺,增强NiOOH的形成.
- 开发的Ni-Mo合金催化剂证明了HMFOR的电催化性能和稳定性得到了改进.
- 这种方法为开发用于生物质升级的耐用和高效电催化剂提供了一个有希望的策略.
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