Qi Feng, Yanbing Sun, Xuguang Li, Jing Zhao, Penghui Zhu, Chi Zhang Data analysis, Donghua Fan
{"title":"A novel amorphous/crystalline RuTe heterostructure catalyst for efficient and sustainable hydrogen production","authors":"Qi Feng, Yanbing Sun, Xuguang Li, Jing Zhao, Penghui Zhu, Chi Zhang Data analysis, Donghua Fan","doi":"10.1016/j.seppur.2024.130531","DOIUrl":null,"url":null,"abstract":"The growing energy crisis and environmental concerns demand sustainable energy solutions, with hydrogen emerging as a promising alternative due to its zero emissions and high energy density. While water electrolysis is ideal and sustainable approach for hydrogen production, it requires efficient electrocatalysts for the hydrogen evolution reaction (HER). Platinum (Pt) is highly effective but costly and less active in alkaline media, prompting research into other alternatives. Ruthenium (Ru), particularly in the form of RuTe<sub>2</sub>, has emerged as a promising alternative due to its better hydrolytic dissociation capacity and lower cost. This study introduces an amorphous/crystalline heterostructure catalyst (a-RuTe@c-Te) for enhanced alkaline HER. The catalyst was synthesized through a green method, producing a porous amorphous RuTe layer on the crystalline Te nanotubes. The a-RuTe@c-Te catalyst demonstrated superior HER activity, with a low overpotential of 27 mV at 10 mA cm<sup>−2</sup> in 1 M KOH, outperforming commercial Pt/C and crystalline RuTe<sub>2</sub>. The density functional theory (DFT) calculations reveal that the d-band center of a-RuTe@c-Te was pulled up closer to Fermi level by the electron enrichments at the amorphous/crystalline interface, leading to a reduced electron filling in the antibonding orbitals, thus increasing the hydrogen adsorption strength. This work offers a promising approach for designing high-performance HER catalysts, advancing sustainable energy applications.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":null,"pages":null},"PeriodicalIF":8.1000,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Separation and Purification Technology","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1016/j.seppur.2024.130531","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
引用次数: 0
Abstract
The growing energy crisis and environmental concerns demand sustainable energy solutions, with hydrogen emerging as a promising alternative due to its zero emissions and high energy density. While water electrolysis is ideal and sustainable approach for hydrogen production, it requires efficient electrocatalysts for the hydrogen evolution reaction (HER). Platinum (Pt) is highly effective but costly and less active in alkaline media, prompting research into other alternatives. Ruthenium (Ru), particularly in the form of RuTe2, has emerged as a promising alternative due to its better hydrolytic dissociation capacity and lower cost. This study introduces an amorphous/crystalline heterostructure catalyst (a-RuTe@c-Te) for enhanced alkaline HER. The catalyst was synthesized through a green method, producing a porous amorphous RuTe layer on the crystalline Te nanotubes. The a-RuTe@c-Te catalyst demonstrated superior HER activity, with a low overpotential of 27 mV at 10 mA cm−2 in 1 M KOH, outperforming commercial Pt/C and crystalline RuTe2. The density functional theory (DFT) calculations reveal that the d-band center of a-RuTe@c-Te was pulled up closer to Fermi level by the electron enrichments at the amorphous/crystalline interface, leading to a reduced electron filling in the antibonding orbitals, thus increasing the hydrogen adsorption strength. This work offers a promising approach for designing high-performance HER catalysts, advancing sustainable energy applications.
日益严重的能源危机和环境问题需要可持续的能源解决方案,而氢气因其零排放和高能量密度成为一种前景广阔的替代能源。水电解是理想的可持续制氢方法,但它需要高效的电催化剂来进行氢进化反应(HER)。铂(Pt)非常有效,但价格昂贵,而且在碱性介质中活性较低,这促使人们研究其他替代品。钌(Ru),尤其是 RuTe2 形式的钌,因其水解解离能力更强、成本更低,已成为一种很有前途的替代品。本研究介绍了一种用于增强碱性 HER 的非晶/晶体异质结构催化剂(a-RuTe@c-Te)。该催化剂采用绿色方法合成,在结晶 Te 纳米管上生成多孔无定形 RuTe 层。a-RuTe@c-Te 催化剂表现出卓越的 HER 活性,在 1 M KOH 中 10 mA cm-2 的过电位低至 27 mV,优于商用 Pt/C 和晶体 RuTe2。密度泛函理论(DFT)计算显示,a-RuTe@c-Te 的 d 带中心被非晶/晶体界面的电子富集拉高至费米水平,导致反键轨道的电子填充减少,从而增加了氢吸附强度。这项工作为设计高性能 HER 催化剂、推进可持续能源应用提供了一种前景广阔的方法。
期刊介绍:
Separation and Purification Technology is a premier journal committed to sharing innovative methods for separation and purification in chemical and environmental engineering, encompassing both homogeneous solutions and heterogeneous mixtures. Our scope includes the separation and/or purification of liquids, vapors, and gases, as well as carbon capture and separation techniques. However, it's important to note that methods solely intended for analytical purposes are not within the scope of the journal. Additionally, disciplines such as soil science, polymer science, and metallurgy fall outside the purview of Separation and Purification Technology. Join us in advancing the field of separation and purification methods for sustainable solutions in chemical and environmental engineering.