Ag2S nanoparticle-decorated MoS2 for enhanced electrocatalytic and photoelectrocatalytic activity in water splitting | |
Department | 清洁能源化学与材料实验室 |
Wang M(王敏)1,2; Ju P(鞠鹏)1,3; Li W(李文)1,2; Zhao Y(赵雲)1,2; Han XX(韩修训)1,3; Han XX(韩修训) | |
2017 | |
Source Publication | Dalton Transactions |
ISSN | 1477-9226 |
Volume | 46Issue:2Pages:483-490 |
Abstract | In this article, a novel Ag2S nanoparticle-decorated MoS2 composite (A@M) was synthesized through a facile in situ growth of the monoclinic crystallographic Ag2S on MoS2 nanosheets. The A@M composite was used as a catalyst in water splitting which exhibits higher electrocatalytic and photoelectrocatalytic activity than the respective pure MoS2 and Ag2S counterparts. Experimental results indicate that the as-prepared A@M composite with an optimal Ag2S/MoS2 molar ratio of 16.30% (16%A@M) shows the best catalytic performance with low overpotentials (110 mV for Voc, 190 mV for onset overpotential, 208 mV for the current density of 20 mA cm−2), a small Tafel slope (42 mV dec−1), and a high photocurrent (82 μA cm−2 under an applied potential of 0.4 V). The enhanced electrocatalytic activity is associated with the improved electrical conductivity resulting from the stretched MoS2 nanosheets and the enriched active sites due to the decorated Ag2S particles. The formation of a type II heterojunction structure at the interface between Ag2S and MoS2 facilitates the separation of photogenerated charge carriers, and thus is responsible for the enhanced photoelectrocatalytic activity and photocatalytic H2 production rate (628 μmol h−1 g−1). This work suggests a promising choice to overcome the intrinsic drawbacks of MoS2 nanostructures for the application in hydrogen evolution. |
Subject Area | 材料科学与物理化学 |
DOI | 10.1039/c6dt04079a |
Funding Organization | the "Top Hundred Talents Program" of Chinese Academy of Sciences (CAS) |
Indexed By | SCI |
Language | 英语 |
Funding Project | 光电材料与器件研究组 |
compositor | 第一作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/21293 |
Collection | 清洁能源化学与材料实验室 |
Corresponding Author | Han XX(韩修训) |
Affiliation | 1.Chinese Acad Sci, Lanzhou Inst Chem Phys, Lab Clean Energy Chem & Mat, Lanzhou 730000, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100080, Peoples R China 3.Qingdao Ctr Resource Chem & New Mat, 36 Jinshui Rd, Qingdao 266100, Peoples R China |
Recommended Citation GB/T 7714 | Wang M,Ju P,Li W,et al. Ag2S nanoparticle-decorated MoS2 for enhanced electrocatalytic and photoelectrocatalytic activity in water splitting[J]. Dalton Transactions,2017,46(2):483-490. |
APA | Wang M,Ju P,Li W,Zhao Y,Han XX,&韩修训.(2017).Ag2S nanoparticle-decorated MoS2 for enhanced electrocatalytic and photoelectrocatalytic activity in water splitting.Dalton Transactions,46(2),483-490. |
MLA | Wang M,et al."Ag2S nanoparticle-decorated MoS2 for enhanced electrocatalytic and photoelectrocatalytic activity in water splitting".Dalton Transactions 46.2(2017):483-490. |
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2017483-490.pdf(2270KB) | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Application Full Text |
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