光催化
掺杂剂
纳米棒
氧气
材料科学
量子产额
析氧
过氧化氢
兴奋剂
载流子
制氢
氢
光电子学
纳米技术
光化学
化学
物理化学
催化作用
物理
荧光
电化学
电极
有机化学
量子力学
作者
Youhong Tang,Fangshou Ye,Binrong Li,Tingyu Yang,Fengyi Yang,Jiafu Qu,Xiaogang Yang,Yahui Cai,Jundie Hu
出处
期刊:Small
[Wiley]
日期:2024-03-15
标识
DOI:10.1002/smll.202400376
摘要
Artificial photosynthesis for hydrogen peroxide (H2 O2 ) presents a sustainable and environmentally friendly approach to generate clean fuel and chemicals. However, the catalytic activity is hindered by challenges such as severe charge recombination, insufficient active sites, and poor selectivity. Here, a robust strategy is proposed to regulate the electronic structure of catalyst by the collaborative effect of defect engineering and dopant. The well designed oxygen-doped CdS nanorods with S2- defects and Cd2+ 4d10 electron configuration (CdS-O,Sv ) is successfully synthesized, and the Cd2+ active sites around S defects or oxygen atoms exhibit rapid charge separation, suppressed carrier recombination, and enhanced charge utilization. Consequently, a remarkable H2 O2 production rate of 1.62 mmol g-1 h-1 under air conditions is acquired, with an apparent quantum yield (AQY) of 9.96% at a single wavelength of 450 nm. This work provides valuable insights into the synergistic effect between defect and doping on catalytic activity.
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