用于高电流密度下高效绿色氢气电催化剂的 Ru/NiMnB 球形簇柱

IF 13.1 1区 化学 Q1 Energy
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引用次数: 0

摘要

先进的 OER/HER 电催化替代品对于绿色氢能的广泛应用至关重要。本文采用电沉积和水热反应相结合的方法合成了 Ru/NiMnB 球形簇柱(SCP),简称 Ru/NiMnB。对 NiMnB 基体中 Ru 掺杂的系统研究表明,电催化性能得到了显著改善。Ru/NiMnB SCP 在 1 M KOH 溶液中 50 mA/cm2 的过电位分别为 150 mV 和 103 mV,显示出卓越的 OER/HER 活性,使其与最先进的电催化剂相比具有很强的竞争力。值得注意的是,在 1 M KOH 中,Ru/NiMnB SCP 在 2,000 mA/cm2 的超高电流密度下显示出 2.80 V 的低 2-E 电池电压,优于 RuO2 || Pt/C 的标准基准电极,从而将 Ru/NiMnB 定位为最佳双功能电催化剂之一。在苛刻的工业条件下,这些 SCP 在 6 M KOH 溶液中以 1,000 mA/cm2 的高电流密度连续工作超过 150 小时。由于活性位点的增加以及电导率、吸附/解吸能力和反应速率等内在特性的改善,只需加入少量的 Ru 就能显著提高镍锰酸盐的电催化性能。因此,Ru/NiMnB SCP 为高效的绿色 H2 生产提供了一种前景广阔的双功能电极概念。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Ru/NiMnB spherical cluster pillar for highly proficient green hydrogen electrocatalyst at high current density

Ru/NiMnB spherical cluster pillar for highly proficient green hydrogen electrocatalyst at high current density

Advanced OER/HER electrocatalytic alternatives are crucial for the wide adaptation of green hydrogen energy. Herein, Ru/NiMnB spherical cluster pillar (SCP), denoted as Ru/NiMnB, is synthesized using a combination of electro-deposition and hydrothermal reaction. Systematic investigation of Ru doping in the NiMnB matrix revealed significant improvements in electrocatalytic performance. The Ru/NiMnB SCPs demonstrate superior OER/HER activity with low overpotentials of 150 and 103 mV at 50 mA/cm2 in 1 M KOH, making them highly competitive with state-of-the-art electrocatalysts. Remarkably, the Ru/NiMnB SCPs exhibit a low 2-E cell voltage of 2.80 V at ultra-high current density of 2,000 mA/cm2 in 1 M KOH, outperforming the standard benchmark electrodes of RuO2 || Pt/C, thereby positioning Ru/NiMnB as one of the best bifunctional electrocatalysts. These SCPs exhibit exceptional high-current characteristics, stability and corrosion resistance, as evidenced by continuous operation at 1,000 mA/cm2 high-current density for over 150 h in 6 M KOH at elevated temperatures under harsh industrial conditions. Only a small amount of Ru incorporation significantly enhances the electrocatalytic performances of NiMnB, attributed to increased active sites and improved intrinsic properties such as conductivity, adsorption/desorption capability and reaction rates. Consequently, Ru/NiMnB SCPs present a promising bi-functional electrode concept for efficient green H2 production.

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来源期刊
Journal of Energy Chemistry
Journal of Energy Chemistry CHEMISTRY, APPLIED-CHEMISTRY, PHYSICAL
CiteScore
19.10
自引率
8.40%
发文量
3631
审稿时长
15 days
期刊介绍: The Journal of Energy Chemistry, the official publication of Science Press and the Dalian Institute of Chemical Physics, Chinese Academy of Sciences, serves as a platform for reporting creative research and innovative applications in energy chemistry. It mainly reports on creative researches and innovative applications of chemical conversions of fossil energy, carbon dioxide, electrochemical energy and hydrogen energy, as well as the conversions of biomass and solar energy related with chemical issues to promote academic exchanges in the field of energy chemistry and to accelerate the exploration, research and development of energy science and technologies. This journal focuses on original research papers covering various topics within energy chemistry worldwide, including: Optimized utilization of fossil energy Hydrogen energy Conversion and storage of electrochemical energy Capture, storage, and chemical conversion of carbon dioxide Materials and nanotechnologies for energy conversion and storage Chemistry in biomass conversion Chemistry in the utilization of solar energy
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