Urchin-shaped semi-enveloped core-shell Pdx@Pt alloy cocatalyst for enhanced photocatalytic hydrogen evolution performance of CdS

IF 8.3 2区工程技术 Q1 CHEMISTRY, PHYSICAL International Journal of Hydrogen Energy Pub Date : 2025-04-04 Epub Date: 2025-03-11 DOI:10.1016/j.ijhydene.2025.03.133

Liuying Xiong , Yihui Zhang , Miao Fa , Wei Chen , Xiying Li , Shuaishuai Zhou , Liqun Mao

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Abstract

In this paper, we developed a co-reduction method to synthesize urchin-shaped Pd_x@Pt semi-enveloped core-shell nanoparticles (NPs) on CdS for enhanced photocatalytic H₂ production. X-ray diffraction (XRD), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS) confirmed that Pd_x@Pt NPs consist of a Pd cubic core with 1D Pt nanowires growing radially on its surface and a unique semi-enveloped core-shell architecture was formed. The cubic Pd core features (200) facets with superior electron extraction capabilities, while the heterojunctions between Pd and Pt on the surface enhance charge separation due to lattice mismatch. Additionally, the Pt nanowires possess high-index surfaces, which contribute to the catalytic activity. As a result, the Pd₃@Pt NPs/CdS exhibited a remarkable hydrogen evolution rate of 80.35 mmol h⁻¹ g⁻¹ than Pd NPs/CdS and pure CdS and demonstrated long-term stability. This work highlights a novel strategy for designing efficient photocatalysts for sustainable hydrogen production.

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海胆形半包膜核壳Pdx@Pt合金助催化剂增强CdS光催化析氢性能

在本文中，我们开发了一种共还原方法，在CdS上合成海胆形状Pdx@Pt半包膜核壳纳米颗粒（NPs），用于增强光催化制氢。x射线衍射（XRD）、透射电子显微镜（TEM）和x射线光电子能谱（XPS）证实，Pdx@Pt NPs由Pd立方核组成，表面呈放射状生长的1D Pt纳米线，形成了独特的半包络核壳结构。立方体Pd核具有200个面，具有优异的电子提取能力，而表面Pd和Pt之间的异质结由于晶格错配而增强了电荷分离。此外，铂纳米线具有高折射率表面，这有助于催化活性。结果表明，Pd3@Pt NPs/CdS的析氢速率为80.35 mmol h−1 g−1，明显高于Pd NPs/CdS和纯CdS，且具有长期稳定性。这项工作强调了设计高效光催化剂用于可持续制氢的新策略。

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来源期刊

International Journal of Hydrogen Energy 工程技术-环境科学

CiteScore

13.50

自引率

25.00%

发文量

3502

审稿时长

60 days

期刊介绍： The objective of the International Journal of Hydrogen Energy is to facilitate the exchange of new ideas, technological advancements, and research findings in the field of Hydrogen Energy among scientists and engineers worldwide. This journal showcases original research, both analytical and experimental, covering various aspects of Hydrogen Energy. These include production, storage, transmission, utilization, enabling technologies, environmental impact, economic considerations, and global perspectives on hydrogen and its carriers such as NH3, CH4, alcohols, etc. The utilization aspect encompasses various methods such as thermochemical (combustion), photochemical, electrochemical (fuel cells), and nuclear conversion of hydrogen, hydrogen isotopes, and hydrogen carriers into thermal, mechanical, and electrical energies. The applications of these energies can be found in transportation (including aerospace), industrial, commercial, and residential sectors.