Function-reversible facets enabling SrTiO3 nanocrystals for improved photocatalytic hydrogen evolution

IF 3.1 4区工程技术 Q3 ENERGY & FUELS

Frontiers in Energy Pub Date : 2023-09-10 DOI:10.1007/s11708-023-0894-4

Bin Wang, Bei An, Xiaoqian Li, Shaohua Shen

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引用次数: 0

Abstract

It has been widely reported that, for faceted nanocrystals, the two adjacent facets with different band levels contribute to promoted charge separation, and provide active sites for photocatalytic reduction and oxidation reaction, respectively. In such cases, only one family of facets can be used for photocatalytic hydrogen evolution. Herein, by using SrTiO₃ nanocrystals enclosed by {023} and {001} facets as a model photocatalyst, this paper proposed a strategy to achieve the full-facets-utilization of the nanocrystals for photocatalytic hydrogen via chemically depositing Pt nanoparticles on all facets. The photo-deposition experiment of CdS provided direct evidence to demonstrate that the {023} facets which were responsible for photooxidation reaction can be function-reversed for photocatalytic hydrogen evolution after depositing Pt nanoparticles, together with the {001} facets. Thus, the full-facets-utilization led to a much-improved activity for photocatalytic hydrogen, in contrast to those SrTiO₃ nanocrystals with only {001} facets deposited by Pt nanoparticles via a photo-deposition method.

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功能可逆面使 SrTiO3 纳米晶体能够改善光催化氢气进化性能

据广泛报道，对于刻面纳米晶体而言，具有不同能带水平的相邻两个刻面有助于促进电荷分离，并分别为光催化还原和氧化反应提供活性位点。在这种情况下，只有一种刻面可用于光催化氢进化。本文以钛酸锶（SrTiO3）纳米晶体的{023}和{001}面为光催化剂模型，提出了一种在纳米晶体的所有面上化学沉积铂纳米颗粒的策略，以实现纳米晶体全面利用光催化氢。CdS 的光沉积实验提供了直接证据，证明了在沉积铂纳米颗粒后，负责光氧化反应的 {023} 面和 {001} 面可以实现功能逆转，用于光催化氢气进化。因此，与铂纳米粒子通过光沉积法沉积的仅有{001}面的钛酸锶纳米晶体相比，利用全刻面可大大提高光催化氢气的活性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Frontiers in Energy Energy-Energy Engineering and Power Technology

CiteScore

5.90

自引率

6.90%

发文量

708

期刊介绍： Frontiers in Energy, an interdisciplinary and peer-reviewed international journal launched in January 2007, seeks to provide a rapid and unique platform for reporting the most advanced research on energy technology and strategic thinking in order to promote timely communication between researchers, scientists, engineers, and policy makers in the field of energy. Frontiers in Energy aims to be a leading peer-reviewed platform and an authoritative source of information for analyses, reviews and evaluations in energy engineering and research, with a strong focus on energy analysis, energy modelling and prediction, integrated energy systems, energy conversion and conservation, energy planning and energy on economic and policy issues. Frontiers in Energy publishes state-of-the-art review articles, original research papers and short communications by individual researchers or research groups. It is strictly peer-reviewed and accepts only original submissions in English. The scope of the journal is broad and covers all latest focus in current energy research. High-quality papers are solicited in, but are not limited to the following areas: -Fundamental energy science -Energy technology, including energy generation, conversion, storage, renewables, transport, urban design and building efficiency -Energy and the environment, including pollution control, energy efficiency and climate change -Energy economics, strategy and policy -Emerging energy issue