Construction of SnO2@CrS2 Nanocuboids Via Solvothermal Synthesis for Photoelectrochemical OER/HER Performance in Alkaline and Acidic Media and Water Detoxification Behavior

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL Catalysis Letters Pub Date : 2024-09-16 DOI:10.1007/s10562-024-04808-6

Sidra Aslam, Basharat Ali, Misbah Mirza, Raheela Naz, Waseem Abbas, Muhammad Safdar

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Abstract

The electrolytic division of water into hydrogen (H₂) and oxygen (O₂) presents a sustainable solution for meeting escalating demands in renewable energy sources. Yet, this process faces formidable challenges due to its energy-intensive nature. Our study introduces efficient electrocatalysts formed from chromium sulphide nanoparticles integrated with tin oxide via a straightforward solvothermal approach, enabling water splitting in both acidic and alkaline settings. The resulting SnO₂@CrS₂ heterostructure exhibits notable performance by requiring lower overpotentials 142 and 99 mV for achieving a current density of 10 mA cm⁻² during the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) in 1 M KOH, and 157 and 165 mV for OER and HER in 0.1 M HClO₄, respectively. Correspondingly, Tafel slopes of 30 and 45 mVdec⁻¹ in 1.0 M KOH and 52 and 32 mVdec⁻¹ in 0.1 M HClO₄ were observed for OER and HER respectively. These catalysts display promising efficiency at reduced overpotentials, demonstrating exceptional performance for overall water splitting. This approach of integrating an active heterostructure through interfacial tuning offers a novel pathway for developing economically viable and efficient electrocatalyst systems crucial for water splitting and H₂ production.

Graphical Abstract

Graphical abstract of synthesized catalyst

Abstract Image

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通过溶热合成构建 SnO2@CrS2 纳米立方体，以实现碱性和酸性介质中的光电化学 OER/HER 性能及水解毒性能

将水电解成氢（H2）和氧（O2）是满足可再生能源日益增长的需求的可持续解决方案。然而，由于其能源密集的性质，这一过程面临着严峻的挑战。我们的研究通过直接的溶解热方法，引入了由硫化铬纳米颗粒与氧化锡整合而成的高效电催化剂，可在酸性和碱性环境中进行水分离。由此产生的 SnO2@CrS2 异质结构表现出显著的性能，在 1 M KOH 溶液中进行氧进化反应（OER）和氢进化反应（HER）时，过电位分别为 142 mV 和 99 mV，达到 10 mA cm-2 的电流密度；在 0.1 M HClO4 溶液中进行 OER 和 HER 时，过电位分别为 157 mV 和 165 mV。相应地，OER 和 HER 在 1.0 M KOH 中的塔菲尔斜率分别为 30 和 45 mVdec-1，在 0.1 M HClO4 中的塔菲尔斜率分别为 52 和 32 mVdec-1。这些催化剂在过电位降低的情况下显示出良好的效率，在整体水分离方面表现出卓越的性能。这种通过界面调谐整合活性异质结构的方法为开发经济上可行且高效的电催化剂系统提供了一条新途径，该系统对于水分离和 H2 生产至关重要。

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来源期刊

Catalysis Letters 化学-物理化学

CiteScore

5.70

自引率

3.60%

发文量

327

审稿时长

1 months

期刊介绍： Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis. The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.