Exploring the catalytic insights of nanoengineered binder-free cobalt sulfide in industrial-condition alkaline water electrolyzers for sustainable green hydrogen production

IF 8.3 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy Pub Date : 2025-07-10 DOI:10.1016/j.ijhydene.2025.150357

Mohamed Sadiq Mohamed Saleem , Parthiban Pazhamalai , Noor Ul Haq Liyakath Ali , Janakiraman Chennakrishnan , Sang -Jae Kim

{"title":"Exploring the catalytic insights of nanoengineered binder-free cobalt sulfide in industrial-condition alkaline water electrolyzers for sustainable green hydrogen production","authors":"Mohamed Sadiq Mohamed Saleem , Parthiban Pazhamalai , Noor Ul Haq Liyakath Ali , Janakiraman Chennakrishnan , Sang -Jae Kim","doi":"10.1016/j.ijhydene.2025.150357","DOIUrl":null,"url":null,"abstract":"<div><div>The development of ultra-stable bifunctional electrocatalysts for high-current operation is vital for advancing alkaline water electrolyzers toward sustainable green hydrogen production. In this viewpoint, binder-free cobalt sulfide (BF–CoS) anchored on Ni-foam via a two-step hydrothermal assisted sulfurization process is used for alkaine water electrolyzer. BF–CoS exhibited low overpotentials (η<sub>100</sub> = 336 mV for OER, η<sub>-50</sub> = −237 mV for HER) and retained its chemical/structural integrity even after continuous operation of 50 h. A lab-scale beaker type electrolyzer using BF–CoS catalyst showed a low cell voltage of 1.765 V at 50 mA cm<sup>−2</sup> and maintained 1.80 V at 500 mA cm<sup>−2</sup> under industrial conditions (80 °C). A solar-powered lab-scale electrolyzer was demonstrated to prove its potential system for green hydrogen production. These findings highlight BF–CoS as a promising binder-free electrocatalyst for next-generation, scalable, and sustainable hydrogen technologies.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"156 ","pages":"Article 150357"},"PeriodicalIF":8.3000,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Hydrogen Energy","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0360319925033555","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}

引用次数: 0

Abstract

The development of ultra-stable bifunctional electrocatalysts for high-current operation is vital for advancing alkaline water electrolyzers toward sustainable green hydrogen production. In this viewpoint, binder-free cobalt sulfide (BF–CoS) anchored on Ni-foam via a two-step hydrothermal assisted sulfurization process is used for alkaine water electrolyzer. BF–CoS exhibited low overpotentials (η₁₀₀ = 336 mV for OER, η_-50 = −237 mV for HER) and retained its chemical/structural integrity even after continuous operation of 50 h. A lab-scale beaker type electrolyzer using BF–CoS catalyst showed a low cell voltage of 1.765 V at 50 mA cm⁻² and maintained 1.80 V at 500 mA cm⁻² under industrial conditions (80 °C). A solar-powered lab-scale electrolyzer was demonstrated to prove its potential system for green hydrogen production. These findings highlight BF–CoS as a promising binder-free electrocatalyst for next-generation, scalable, and sustainable hydrogen technologies.

Abstract Image

查看原文本刊更多论文

探索纳米工程无粘结剂硫化钴在工业条件碱性水电解槽中催化可持续绿色制氢的见解

大电流运行用超稳定双功能电催化剂的开发是推动碱性水电解槽实现可持续绿色制氢的关键。在这种观点下，无粘结剂硫化钴（BF-CoS）通过两步水热辅助硫化工艺锚定在泡沫镍上，用于碱性水电解槽。BF-CoS表现出较低的过电位（OER的η为100 = 336 mV， HER的η为-50 = - 237 mV），即使在连续运行50小时后仍保持其化学/结构完整性。在实验室规模的烧杯式电解槽中，使用BF-CoS催化剂的电解槽在50 mA cm - 2时的电池电压为1.765 V，在工业条件下（80°C）在500 mA cm - 2时保持1.80 V。一个由太阳能驱动的实验室规模的电解槽被展示，以证明其潜在的绿色制氢系统。这些发现突出了BF-CoS作为下一代、可扩展和可持续氢技术的无粘合剂电催化剂的前景。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

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.