Atom doping and alkali etching to construct defect-rich electrocatalysts for efficient overall water splitting

IF 6.3 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of water process engineering Pub Date : 2025-05-01 DOI:10.1016/j.jwpe.2025.107856

Yuying Yang, Yanzhe Chen, Qiannan Sun, Yilun He, Daying Xu, Yaling Xiong, Zhongai Hu

{"title":"Atom doping and alkali etching to construct defect-rich electrocatalysts for efficient overall water splitting","authors":"Yuying Yang, Yanzhe Chen, Qiannan Sun, Yilun He, Daying Xu, Yaling Xiong, Zhongai Hu","doi":"10.1016/j.jwpe.2025.107856","DOIUrl":null,"url":null,"abstract":"<div><div>Doping with heteroatoms and incorporating morphological defects are regarded as potent strategies to enhance the catalytic efficacy of electrocatalysts based on non-precious metals. In this work, a non-noble metal bifunctional water electrolysis catalyst with morphology defects Fe-Ni<sub>3</sub>S<sub>2</sub>@NF was prepared by the method of Fe atom doping and alkali etching strategies. It should be emphasized that, due to the synergistic effect of the two strategies, the composites exhibits significantly improved catalytic performance for both hydrogen and oxygen precipitation reactions (HER and OER) under alkaline conditions. And it exhibits extremely low water-splitting cell voltage. The system achieves an impressively low voltage of just 1.4 V and the overpotentials of OER (164 mV) and HER (62 mV) at 10 mA cm<sup>−2</sup>. This study offers a concept for fabricating sulfide catalysts from non-noble metals that exhibit outstanding electrocatalytic capabilities.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"74 ","pages":"Article 107856"},"PeriodicalIF":6.3000,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of water process engineering","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2214714425009286","RegionNum":2,"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

Doping with heteroatoms and incorporating morphological defects are regarded as potent strategies to enhance the catalytic efficacy of electrocatalysts based on non-precious metals. In this work, a non-noble metal bifunctional water electrolysis catalyst with morphology defects Fe-Ni₃S₂@NF was prepared by the method of Fe atom doping and alkali etching strategies. It should be emphasized that, due to the synergistic effect of the two strategies, the composites exhibits significantly improved catalytic performance for both hydrogen and oxygen precipitation reactions (HER and OER) under alkaline conditions. And it exhibits extremely low water-splitting cell voltage. The system achieves an impressively low voltage of just 1.4 V and the overpotentials of OER (164 mV) and HER (62 mV) at 10 mA cm⁻². This study offers a concept for fabricating sulfide catalysts from non-noble metals that exhibit outstanding electrocatalytic capabilities.

查看原文本刊更多论文

原子掺杂和碱腐蚀构建富缺陷电催化剂的高效整体水分解

杂原子掺杂和掺杂形态缺陷被认为是提高非贵金属电催化剂催化效能的有效策略。本文采用Fe原子掺杂和碱刻蚀的方法制备了具有形貌缺陷Fe-Ni3S2@NF的非贵金属双功能水电解催化剂。需要强调的是，由于两种策略的协同作用，复合材料在碱性条件下对氢和氧沉淀反应（HER和OER）的催化性能都有显著提高。它具有极低的水分解电池电压。该系统在10 mA cm - 2下实现了令人印象深刻的1.4 V低电压和OER （164 mV）和HER （62 mV）过电位。本研究为利用非贵金属制造具有优异电催化性能的硫化物催化剂提供了一个概念。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Journal of water process engineering Biochemistry, Genetics and Molecular Biology-Biotechnology

CiteScore

10.70

自引率

8.60%

发文量

846

审稿时长

24 days

期刊介绍： The Journal of Water Process Engineering aims to publish refereed, high-quality research papers with significant novelty and impact in all areas of the engineering of water and wastewater processing . Papers on advanced and novel treatment processes and technologies are particularly welcome. The Journal considers papers in areas such as nanotechnology and biotechnology applications in water, novel oxidation and separation processes, membrane processes (except those for desalination) , catalytic processes for the removal of water contaminants, sustainable processes, water reuse and recycling, water use and wastewater minimization, integrated/hybrid technology, process modeling of water treatment and novel treatment processes. Submissions on the subject of adsorbents, including standard measurements of adsorption kinetics and equilibrium will only be considered if there is a genuine case for novelty and contribution, for example highly novel, sustainable adsorbents and their use: papers on activated carbon-type materials derived from natural matter, or surfactant-modified clays and related minerals, would not fulfil this criterion. The Journal particularly welcomes contributions involving environmentally, economically and socially sustainable technology for water treatment, including those which are energy-efficient, with minimal or no chemical consumption, and capable of water recycling and reuse that minimizes the direct disposal of wastewater to the aquatic environment. Papers that describe novel ideas for solving issues related to water quality and availability are also welcome, as are those that show the transfer of techniques from other disciplines. The Journal will consider papers dealing with processes for various water matrices including drinking water (except desalination), domestic, urban and industrial wastewaters, in addition to their residues. It is expected that the journal will be of particular relevance to chemical and process engineers working in the field. The Journal welcomes Full Text papers, Short Communications, State-of-the-Art Reviews and Letters to Editors and Case Studies