【氢能】CuxZny双金属负载TiO2纳米棒 强化光催化制氢性能研究
Study on bimetallic CuxZny supported TiO2 nanorods for enhanced photocatalytic H2 production
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- 引用格式:
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贾海平,刘衡,李磊,程诚,师进文,敬登伟,刘杰.【氢能】CuxZny双金属负载TiO2纳米棒 强化光催化制氢性能研究[J].天然气与石油,2024,42(5):70-78.doi:10.3969/j.issn.1006-5539.2024.05.011
JIA Haiping, LIU Heng, LI Lei, CHENG Cheng, SHI Jinwen, JING Dengwei, LIU Jie.Study on bimetallic CuxZny supported TiO2 nanorods for enhanced photocatalytic H2 production[J].Natural Gas and Oil,2024,42(5):70-78.doi:10.3969/j.issn.1006-5539.2024.05.011
- DOI:
- 10.3969/j.issn.1006-5539.2024.05.011
- 作者:
- 贾海平1 刘衡2 李磊2 程诚2 师进文2 敬登伟2 刘杰3
JIA Haiping1, LIU Heng2, LI Lei2, CHENG Cheng2, SHI Jinwen2, JING Dengwei2, LIU Jie3
- 作者单位:
- 1. 陕西燃气集团富平能源科技有限公司, 陕西 渭南 711700; 2. 西安交通大学动力工程多相流国家重点实验室, 陕西 西安 710049; 3. 辽宁石油化工大学石油天然气工程学院, 辽宁 抚顺 113001
1. Shaanxi Gas Group Fuping Energy Technology Co., Ltd., Weinan, Shaanxi, 711700, China; 2. State Key Laboratory of Multiphase Flow in Power Engineering(MFPE), Xian Jiaotong University, Xian, Shaanxi, 710049, China; 3. School of Petroleum and Natural Gas Engineering, Liaoning Petrochemical University, Fushun, Liaoning, 113001, China
- 关键词:
- 太阳能;制氢;光热催化;双金属助催化剂
Solar energy; Hydrogen production; Photothermal catalysis; Bimetallic cocatalyst
- 摘要:
- 金属助催化剂负载对提高二氧化钛(TiO2)的光催化制氢性能起着关键作用,金属负载TiO2形成肖特基结能有效促进载流子的分离和迁移,双金属相比单一金属通常具有更优越的助催化性能,不同金属的组合提供了克服单一金属局限性的方法。制备了系列CuxZny双金属负载的TiO2(CuxZny/TiO2)催化剂材料,并进行光催化制氢研究。锌(Zn)可以延长光激发电子的寿命;铜(Cu)不仅可以提高载流子迁移效率,表面等离子体共振效应还可有效捕获太阳光中的红外光,将红外光转化为热能用于促进制氢反应。此外,Cu和Zn的协同效应使CuxZny双金属的助催化效果显著优于单一金属Cu或Zn,更有效抑制了TiO2光生载流子的复合,提高了载流子的利用率,进一步提高了对太阳光的利用率。Cu3Zn3/TiO2的光催化制氢速率最高,达到了3
726 μmol·g-1·h-1,是纯TiO2光催化制氢速率的5.9倍。研究结果为设计双金属助催化剂和光热耦合催化提供了重要的研究思路。
Metal cocatalyst plays a key role in improving the photocatalytic hydrogen production performance of TiO2 as the formation of Schottky junctions by metal-supported TiO2 can effectively promote the separation and migration of charge carriers. Bimetals usually have better cocatalytic performance than single metals, and the combination of different metals provides a way to overcome the limitations of single metals. Therefore, a series of bimetallic CuxZny supported TiO2 (CuxZny/TiO2) photocatalysts were prepared for boosting photocatalytic hydrogen production. Zn can prolong the life span of photoexcited electrons. Cu does not only improve the migration of charge carriers, its surface plasmon resonance effect can effectively capture and convert the infrared light into heat energy for promoting hydrogen production reaction. The synergistic effect between Cu and Zn results in the CuxZny bimetal exhibiting significantly better cocatalytic performance than single Cu or Zn metals, more effectively inhibiting the recombination of photogenerated carriers in TiO2 and improving the utilization of these carriers, thereby further enhancing the utilization of sunlight. Cu3Zn3/TiO2 shows the highest photocatalytic hydrogen production rate of 3 726 μmol·g-1·h-1, which is 5.9 times that of pure TiO2. This study provides an important reference for the design of bimetallic cocatalysts and photothermal coupled catalysis.
