Anchoring highly distributed Pt species over oxidized graphitic carbon nitride for photocatalytic hydrogen evolution: The effect of reducing agents

被引：16

作者：

Dao, Quang Duc ^{[1
,5
]}

Nguyen, Thi Kim Anh ^{[1
,6
]}

Dang, Thanh Truong ^{[1
]}

Kang, Sung Gu ^{[1
]}

Nguyen-Phu, Huy ^{[2
]}

Do, Lien Thi ^{[3
]}

Van, Vo Kim Hieu ^{[4
]}

Chung, Koo-Hyun ^{[4
]}

Chung, Jin Suk ^{[1
]}

Shin, Eun Woo ^{[1
]}

机构：

[1] Univ Ulsan, Sch Chem Engn, Daehakro 93, Ulsan 44610, South Korea

[2] Seoul Natl Univ Sci & Technol, Dept Chem & Biomol Engn, Seoul 01811, South Korea

[3] Phenikaa Univ, Fac Biotechnol Chem & Environm Engn, Hanoi 10000, Vietnam

[4] Univ Ulsan, Sch Mech Engn, Daehakro 93, Ulsan 44610, South Korea

[5] Univ Queensland, Sch Chem Engn, Brisbane, Qld 4072, Australia

[6] Univ Sydney, Fac Engn, Nanotechnol Res Lab, Sydney, NSW 2006, Australia

来源：

APPLIED SURFACE SCIENCE | 2023年 / 609卷

基金：

新加坡国家研究基金会;

关键词：

Pt loading method; Pt; Pt valence state; Metal-support interaction; Charge separation; Hydrogen evolution; TOTAL-ENERGY CALCULATIONS; PLATINUM NANOPARTICLES; SUPPORT INTERACTION; G-C3N4; NANOSHEETS; WATER; EFFICIENCY; REDUCTION; ATOMS; CEO2/G-C3N4; EXFOLIATION;

D O I：

10.1016/j.apsusc.2022.155305

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：

Platinum (Pt) as a cocatalyst over graphitic carbon nitride (g-C3N4) is the main active site in the hydrogen evolution reaction (HER). Therefore, controlling the properties of Pt is significant to achieve a high H2 pro-duction yield in which the reduction step of the Pt precursor is an important factor. In this study, we prepared Pt-loaded chemically oxidized g-C3N4 photocatalysts for photocatalytic hydrogen evolution using different Pt deposition methods-chemical reduction with hydrazine, hydrogen reduction, and photoreduction. The hydrogen evolution rate of the chemically oxidized Pt/g-C3N4 photocatalysts prepared via hydrogen reduction (1152.8 mu mol g-1h-1) was the highest compared to those prepared via chemical reduction (409.9 mu mol g-1h-1) and photoreduction (583.7 mu mol g-1h-1). The hydrogen reduction method with a fine reducing ability could achieve a uniform distribution of Pt nanoparticles anchored onto the chemically oxidized g-C3N4 nanosheets while maintaining homogeneity between the Pt precursor - reducing agent - g-C3N4. Furthermore, during hydrogen reduction, the greatest CO content and lowest concentrations of COOH and COH groups on the g-C3N4 surface resulted in an extremely high Pt2+/Pt0 ratio, a strong electronic Pt-g-C3N4 interaction, and the highest charge transfer efficiency, enhancing the hydrogen evolution rate.

引用

页数：14

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