Engineering novel MnxCd1-xS self-assembled p-n junction modified with NiS for enhanced photocatalytic hydrogen evolution

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Research Bulletin Pub Date : 2024-11-26 DOI:10.1016/j.materresbull.2024.113230

Xueying Wang , Hanmei Hu , Tianle Zhang , Han Xuan , Chonghai Deng

{"title":"Engineering novel MnxCd1-xS self-assembled p-n junction modified with NiS for enhanced photocatalytic hydrogen evolution","authors":"Xueying Wang , Hanmei Hu , Tianle Zhang , Han Xuan , Chonghai Deng","doi":"10.1016/j.materresbull.2024.113230","DOIUrl":null,"url":null,"abstract":"<div><div>A new type of MnxCd1-xS p-n junction self-assembled by n-type twin-phase MnxCd1-xS (T-CdS-hosted MCS) and p-type MnxCd1-xS (α-MnS-hosted MCS) was fabricated through a convenient one-pot hydrothermal route. The photocatalytic HER performance of 0.5MCS (x = 0.5) was greatly improved on coupling with noble metal-free NiS cocatalyst. The H2-evolution rate of optimal 1.0 wt% NiS/0.5MCS reached 53.4 mmol·g-1·h-1 under visible-light irradiation, almost 17.6 times higher than that of pristine T-CdS, which significantly exceeded that of 1.0 wt% Pt/0.5MCS (16.7 mmol·g-1·h-1). The AQE of 1.0 wt% NiS/0.5MCS of was 22.49% at 420 nm. The possible photocatalytic mechanism was rationally put forward based on the current experimental results and band structure, revealing that the built-in electric field at the interface of MnxCd1-xS p-n junction as well as auxiliary catalytic effect of NiS effectively promoted the transfer and separation of the photogenerated electron-hole pairs, thus leading to the improvement of photocatalytic HER ability.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"184 ","pages":"Article 113230"},"PeriodicalIF":5.3000,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Research Bulletin","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0025540824005592","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

A new type of Mn_xCd_1-xS p-n junction self-assembled by n-type twin-phase Mn_xCd_1-xS (T-CdS-hosted MCS) and p-type Mn_xCd_1-xS (α-MnS-hosted MCS) was fabricated through a convenient one-pot hydrothermal route. The photocatalytic HER performance of 0.5MCS (x = 0.5) was greatly improved on coupling with noble metal-free NiS cocatalyst. The H₂-evolution rate of optimal 1.0 wt% NiS/0.5MCS reached 53.4 mmol·g^-1·h^-1 under visible-light irradiation, almost 17.6 times higher than that of pristine T-CdS, which significantly exceeded that of 1.0 wt% Pt/0.5MCS (16.7 mmol·g^-1·h^-1). The AQE of 1.0 wt% NiS/0.5MCS of was 22.49% at 420 nm. The possible photocatalytic mechanism was rationally put forward based on the current experimental results and band structure, revealing that the built-in electric field at the interface of Mn_xCd_1-xS p-n junction as well as auxiliary catalytic effect of NiS effectively promoted the transfer and separation of the photogenerated electron-hole pairs, thus leading to the improvement of photocatalytic HER ability.

Abstract Image

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

工程新颖的MnxCd1-xS自组装p-n结修饰的NiS增强光催化析氢

通过一锅水热法制备了n型MnxCd1-xS双相（t - cds为主的MCS）和p型MnxCd1-xS （α- mns为主的MCS）自组装的新型MnxCd1-xS p-n结。与无贵金属的NiS助催化剂偶联后，0.5 mcs （x = 0.5）的光催化HER性能大大提高。在可见光照射下，1.0 wt% NiS/0.5MCS的最佳h-进化速率达到53.4 mmol·g-1·h-1，是原始T-CdS的17.6倍，显著高于1.0 wt% Pt/0.5MCS的16.7 mmol·g-1·h-1。1.0 wt% NiS/0.5MCS的AQE在420 nm处为22.49%。结合现有实验结果和能带结构，合理提出了可能的光催化机理，揭示了MnxCd1-xS p-n结界面处的内置电场以及NiS的辅助催化作用有效地促进了光生电子-空穴对的转移和分离，从而提高了光催化HER能力。

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分钟内获得全文去求助

来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.