Engineering Pt single atom catalysts on titania nanotubes via the photo/ electrochemical pathway for a selective ammonia oxidation reaction

被引：0
|
作者：
Zhang, Zhenru [1 ,2 ]
Shit, Subhash Chandra [1 ]
Kim, Hyo Won [1 ]
Ahn, Tae Kyu [2 ]
Kim, Wooyul [1 ]
机构：
[1] Korea Inst Energy Technol KENTECH, Dept Energy Engn, KENTECH Inst Environm & Climate Technol, Naju 58330, South Korea
[2] Sungkyunkwan Univ, Dept Energy Sci, Suwon 16419, South Korea
来源：
APPLIED SURFACE SCIENCE | 2025年 / 685卷
基金：
新加坡国家研究基金会;
关键词：
Trace amount Pt deposition; Single atom catalysts; CO-IR spectroscopy; Photoelectrochemical ammonia oxidation; TIO2; NANOTUBES; CHARGE SEPARATION; NANOPARTICLES; ARRAYS; WATER;
D O I：
10.1016/j.apsusc.2024.162049
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
This study presents the synthesis of a self-organized TiO2 nanotube (TNT) array via anodization of Ti foil, followed by Pt deposition using electrochemical (ED), photoelectrochemical (PED), and combined ED/PED techniques without a metal precursor in the electrolyte. Structural analysis confirmed anatase TiO2 nanotubes with single-atom Pt in Pt/TNTED and Pt/TNTED/PED, while Pt clusters formed in Pt/TNTPED. The Pt/TNTED/PED system showed superior Pt-TiO2 electronic interactions (XPS and CO-IR) and achieved the best photoelectrochemical performance, with enhanced photocurrent density, reduced overpotential for ammonia oxidation, and high stability. It also exhibited excellent hydrogen and nitrogen evolution rates, with optimized NH4OH concentration (0.1 M) further boosting performance. This work highlights the potential of Pt-deposited TNT, particularly Pt/ TNT ED/PED , for efficient photoelectrochemical ammonia oxidation and hydrogen production, offering valuable insights for catalyst optimization.
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页数：9
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