Carbonized MoS2: Super-Active Co-Catalyst for Highly Efficient Water Splitting on CdS

Shao, Mengmeng1; Shao, Yangfan1,3; Ding, Shengjie1; Tong, Rui1; Zhong, Xiongwei1,4; Yao, Lingmin5; Ip, Weng Fai2; Xu, Baomin4; Shi, Xing-Qiang3; Sun, Yi-Yang6; Wang, Xuesen7; Pan, Hui1,2

2019-02-18

10.1021/acssuschemeng.8b05917

ACS Sustainable Chemistry & Engineering   影响因子和分区

2168-0485

Searching photocatalysts for efficient hydrogen production has been a challenging issue for solar-energy harvesting. Using co-catalyst is proven to be an effective approach to improve the efficiency of photocatalyst in water-splitting. Here, we report that carbonized MoS2 (MoS2/Mo2C) can be a superactive co-catalyst in solar-driven hydrogen production. We show that MoS2/Mo2C decorated CdS achieves a high photocatalytic hydrogen evolution rate (34 mmol/h/g, similar to 112 times higher than pure CdS) and excellent apparent quantum efficiency (41.4% at 420 nm). The outstanding photocatalytic performance of MoS2/Mo2C/CdS is attributed to the metallic characteristic of MoS2/Mo2C and suitable Gibbs free energy of hydrogen adsorption, leading to enhanced light absorption, fast separation and transportation of photoinduced carriers, and optimal activity in hydrogen evolution reaction (HER). We further show that MoS2/Mo2C as co-catalyst can also dramatically improve the photocatalytic activity of g-C3N4. Our findings demonstrate that the carbonized transition metal disulfide can be active as co-catalyst in photocatalysis, providing guidance on exploring novel photocatalysts for energy harvesting.

MoS2/Mo2C CdS Photocatalytic hydrogen evolution Co-catalyst

SCI ; EI

英语

其他

Singapore MOE AcRF[R-144-000-365-112]

Chemistry ; Science & Technology - Other Topics ; Engineering

Chemistry, Multidisciplinary ; Green & Sustainable Science & Technology ; Engineering, Chemical

WOS:000459367400064

AMER CHEMICAL SOC

20190706495781

Cadmium sulfide ; Catalysts ; Energy harvesting ; Free energy ; Gas adsorption ; Gibbs free energy ; II-VI semiconductors ; Layered semiconductors ; Light absorption ; Molybdenum compounds ; Photocatalysis ; Photocatalytic activity ; Solar energy ; Solar power generation ; Sulfur compounds ; Transition metals

Gas Fuels:522 ; Energy Conversion Issues:525.5 ; Metallurgy and Metallography:531 ; Solar Power:615.2 ; Thermodynamics:641.1 ; Solar Energy and Phenomena:657.1 ; Light/Optics:741.1 ; Chemical Operations:802.3 ; Chemical Products Generally:804

Web of Science

1.Univ Macau, Fac Sci & Technol, Inst Appl Phys & Mat Engn, Joint Key Lab,Minist Educ, Taipa, Macao, Peoples R China
2.Univ Macau, Fac Sci & Technol, Dept Phys & Chem, Taipa, Macao, Peoples R China
3.Southern Univ Sci & Technol, Dept Phys, 1088 Xueyuan Rd, Shenzhen 518055, Peoples R China
4.Southern Univ Sci & Technol, Dept Mat Sci & Engn, 1088 Xueyuan Rd, Shenzhen 518055, Peoples R China
5.Guangzhou Univ, Sch Phys & Elect Engn, Guangzhou Higher Educ Mega Ctr, 230 Wai Huan Xi Rd, Guangzhou 510006, Guangdong, Peoples R China
6.Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, 585 Heshuo Rd, Shanghai 201899, Peoples R China
7.Natl Univ Singapore, Dept Phys, 2 Sci Dr 3, Singapore 117542, Singapore

Shao, Mengmeng,Shao, Yangfan,Ding, Shengjie,et al. Carbonized MoS2: Super-Active Co-Catalyst for Highly Efficient Water Splitting on CdS[J]. ACS Sustainable Chemistry & Engineering,2019,7(4):4220-+.

Shao, Mengmeng.,Shao, Yangfan.,Ding, Shengjie.,Tong, Rui.,Zhong, Xiongwei.,...&Pan, Hui.(2019).Carbonized MoS2: Super-Active Co-Catalyst for Highly Efficient Water Splitting on CdS.ACS Sustainable Chemistry & Engineering,7(4),4220-+.

Shao, Mengmeng,et al."Carbonized MoS2: Super-Active Co-Catalyst for Highly Efficient Water Splitting on CdS".ACS Sustainable Chemistry & Engineering 7.4(2019):4220-+.