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对于光催化演化和乙烯糖醇氧化的双功能中等性二硫化物

Tanu Bagaria^1,2, Brajesh Rajesh Bhagat¹, Srija Ghosh¹

¹Research Institute for Sustainable Energy (RISE), TCG Centres for Research and Education in Science and Technology (TCG-CREST), Salt Lake, Kolkata 700091, India.

Langmuir : the ACS journal of surfaces and colloids

|December 30, 2025

概括

一种新的化硫化金光催化剂利用太阳能从水中有效地产生. 这种稳定,地球上丰富的催化剂在淡水,海水和化学生产中表现出增强的性能.

科学领域:

材料科学材料科学材料科学
光催化作用的光催化
可再生能源可再生能源是可再生能源.

背景情况:

通过水分的太阳能气生产对于清洁能源至关重要.
开发高效和稳定的演化反应 (HER) 催化剂是关键.
目前的催化剂通常需要共催化剂或在稳定性和效率方面存在局限性.

研究的目的:

合成一种新型的中硫化光催化剂,用于直接生产H2.
调查催化剂在水分裂中的性能及其稳定性.
探索其在增值化学品产生和在人造海水中使用的潜力.

主要方法:

Cd1-x-yNixMoyZn0.45S (二硫化物光催化剂) 的水热合成.
结晶结构和组成的表征.
在太阳辐射下对光催化H2进化速率的评估.
密度功能理论 (DFT) 用于活动部位分析.
在淡水,人造海水和以乙烯糖醇 (EG) 作为牺牲剂进行测试.

主要成果:

最佳组合,Cd0.39Ni0.09Mo0.07Zn0.45S (CNMZS-3),与CdS相比,显示H2演化速率增加了6倍 (2437.87 μmol g-1 h-1),而CdS则增加了6倍.
在72小时内,CNMZS-3表现出极好的稳定性.
DFT显示Mo是H吸附的活性位点,Ni是光吸附的活性位点,产生了协同效应.
在EG氧化过程中,H2的产生增加到3746.74μmolg-1h-1,产生酸盐.
在人造海水中实现了有效的H2演化 (1786.79 μmol g-1 h-1).

结论:

中等的硫化物是有效的,稳定的和多功能的光催化剂,用于H2生产.
设计的催化剂减少了对Cd的依赖,同时保持了高性能.
这项技术显示出从各种水源中可持续产生H2的潜力,以及生产有价值的化学物质.

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