Heterointerface and crystallinity engineering of Ru/RuS2 dual co-catalysts for enhanced photocatalytic hydrogen evolution

IF 20.2 1区化学 Q1 CHEMISTRY, PHYSICAL

Applied Catalysis B: Environmental Pub Date : 2024-01-11 DOI:10.1016/j.apcatb.2024.123722

Xinyu Wang , Junhua You , Jiali Ren , Yanjun Xue , Jian Tian , Hangzhou Zhang

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Abstract

In this paper, the Ru/RuS₂ nanoparticles as dual co-catalysts were self-assembled on the surface of g-C₃N₄ nanotubes (Ru/RuS₂/g-C₃N₄ NTs) for photocatalytic H₂ production. The Ru/RuS₂/g-C₃N₄ NTs showed greatly enhanced photocatalytic H₂ production activity (1409 μmol·g⁻¹·h⁻¹), 1.16 times of RuS₂/g-C₃N₄ NTs (1212 μmol·h⁻¹·g⁻¹), 10.51 times of Ru/g-C₃N₄ NTs (134 μmol·g⁻¹·h⁻¹), and 82.88 times of the pure g-C₃N₄ NTs (17 μmol·g⁻¹·h⁻¹). Besides, the apparent quantum yield value (AQE) of Ru/RuS₂/g-C₃N₄ NTs is 3.92% at 370 nm. Ru/RuS₂ as dual co-catalysts are self-assembled on the surface of g-C₃N₄ NTs and show strong electronic synergistic interaction between the interfaces, reduce ΔG_H* of RuS₂ and desorption energy of Ru, and promote the selectivity and activity of HER kinetically and thermodynamically respectively, which exhibits higher photogenerated carrier concentration and lower charge migration resistance than RuS₂ and Ru, showing the synergistic effect to facilitate the generation and migration of carriers and provides active sites for photocatalysis.

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用于增强光催化氢气进化的 Ru/RuS2 双元共催化剂的异界面和结晶度工程设计

本文在 g-C3N4 纳米管（Ru/RuS2/g-C3N4 NTs）表面自组装了 Ru/RuS2 纳米粒子作为双重助催化剂，用于光催化产生 H2。Ru/RuS2/g-C3N4 纳米管的光催化产生 H2 的活性大大提高（1409 μmol-g-1-h-1），是 RuS2/g-C3N4 纳米管（1212 μmol-h-1-g-1）的 1.16 倍，Ru/g-C3N4 纳米管（134 μmol-g-1-h-1）的 10.51 倍，纯 g-C3N4 纳米管（17 μmol-g-1-h-1）的 82.88 倍。此外，在 370 纳米波长下，Ru/RuS2/g-C3N4 纳米二氧化钛的表观量子产率值（AQE）为 3.92%。Ru/RuS2作为双助催化剂自组装在g-C3N4氮氧化物表面，界面间表现出很强的电子协同作用，降低了RuS2的ΔGH*和Ru的解吸能，分别从动力学和热力学上促进了HER的选择性和活性，与RuS2和Ru相比，RuS2表现出更高的光生载流子浓度和更低的电荷迁移阻力，显示出促进载流子产生和迁移的协同效应，为光催化提供了活性位点。

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来源期刊

Applied Catalysis B: Environmental 环境科学-工程：化工

CiteScore

38.60

自引率

6.30%

发文量

1117

审稿时长

24 days

期刊介绍： Applied Catalysis B: Environment and Energy (formerly Applied Catalysis B: Environmental) is a journal that focuses on the transition towards cleaner and more sustainable energy sources. The journal's publications cover a wide range of topics, including: 1.Catalytic elimination of environmental pollutants such as nitrogen oxides, carbon monoxide, sulfur compounds, chlorinated and other organic compounds, and soot emitted from stationary or mobile sources. 2.Basic understanding of catalysts used in environmental pollution abatement, particularly in industrial processes. 3.All aspects of preparation, characterization, activation, deactivation, and regeneration of novel and commercially applicable environmental catalysts. 4.New catalytic routes and processes for the production of clean energy, such as hydrogen generation via catalytic fuel processing, and new catalysts and electrocatalysts for fuel cells. 5.Catalytic reactions that convert wastes into useful products. 6.Clean manufacturing techniques that replace toxic chemicals with environmentally friendly catalysts. 7.Scientific aspects of photocatalytic processes and a basic understanding of photocatalysts as applied to environmental problems. 8.New catalytic combustion technologies and catalysts. 9.New catalytic non-enzymatic transformations of biomass components. The journal is abstracted and indexed in API Abstracts, Research Alert, Chemical Abstracts, Web of Science, Theoretical Chemical Engineering Abstracts, Engineering, Technology & Applied Sciences, and others.