DataVXACS Applied Energy MaterialsPaper
journal article·2019-04-22

Ag2S Quantum Dots as an Infrared Excited Photocatalyst for Hydrogen Production

Weili Yu, Jun Yin, Yuan Li, Bo Lai, Tong Jiang, Yangyang Li, Huiwen Liu, Jiale Liu, Chen Zhao, Subhash C. Singh, Jingsheng Chen, Bin Lin, Hicham Idriss, Chunlei Guo

ACS Applied Energy Materials· Volume 2· Issue 4
Publisher page
Source abstract

Abstract

H2 production using nanoscale semiconductors via photocatalytic water splitting is a much sought-after technology to curb carbon dioxide emission. Among the many challenges found to date is the search for a stable semiconductor photocatalyst responding to visible and preferably visible and IR light. Ag2S is a narrow bandgap semiconductor with a bulk electronic gap smaller than that needed to split water. In this work, using a solvent thermal strategy, we have increased its bandgap energy by shifting up the conduction band edge to make it suitable for the electron transfer reaction to hydrogen ions. The Ag2S quantum dots (QDs) were tested as both electrocatalysts and photocatalysts. As electrocatalysts, Ag2S QDs with an absorption peak at 800 nm (QD800) showed the highest H2 evolution activity with a Tafel slope of 89 mV/dec with an overpotential of 0.32 V. As photocatalysts, H2 was produced at a rate of 858 μmol h–1 gcatal–1 under a white light flux of 100 mW cm–2. Moreover, QD800 was also found to be active under only near-infrared excitation (800 ± 20 nm). This is the longest wavelength reported so far to excite a semiconductor and generate H2.
Source: openalex_inverted_index · Quality: baseline

Research context

NanomaterialsElectronic materialsCatalysis & surfaces

OpenAlex topics: Advanced Photocatalysis Techniques · Quantum Dots Synthesis And Properties · Copper-based nanomaterials and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

The Guo China-US Joint Photonics Laboratory (GPL), State Key Laboratory of Applied Optics (SKLAO), Changchun Institute of Optics, Fine Mechanics and Physics (CIOMP), Chinese Academy of Sciences (CAS), Changchun 130033, P. R. China

The Institute of Optics, University of Rochester, Rochester, New York 14627, United States

Department of Journal, Jilin University of Arts, Changchun 130021, P. R. China

Department of Materials Science and Engineering, National University of Singapore, Singapore 117576, Singapore

State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, P. R. China

School of Energy Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, P. R. China

Department of Chemistry, University College London, London WC1E 6BT, U.K.

Funding

National Natural Science Foundation of China · Ministry of Science and Technology of the People's Republic of China

References (48)

Show source-provided references
1. 10.1021/cr00017a01610.1021/cr00017a016 ↗
2. 10.1126/science.106105110.1126/science.1061051 ↗
3. 10.1002/adma.20160583810.1002/adma.201605838 ↗
4. 10.1038/lsa.2014.1410.1038/lsa.2014.14 ↗
5. 10.1021/acsami.6b0392410.1021/acsami.6b03924 ↗
6. 10.1021/acsami.7b1203810.1021/acsami.7b12038 ↗
7. 10.1021/acsami.7b1382210.1021/acsami.7b13822 ↗
8. 10.1021/acsami.6b1473210.1021/acsami.6b14732 ↗
9. 10.1002/anie.20120463510.1002/anie.201204635 ↗
10. 10.1021/ja026964310.1021/ja0269643 ↗
11. 10.1039/c3ee42951b10.1039/c3ee42951b ↗
12. 10.1021/jp012453b10.1021/jp012453b ↗
13. 10.1088/0953-8984/14/1/10210.1088/0953-8984/14/1/102 ↗
14. 10.1002/anie.20120605910.1002/anie.201206059 ↗
15. 10.1002/anie.20120671510.1002/anie.201206715 ↗
16. 10.1016/j.jcis.2014.02.00910.1016/j.jcis.2014.02.009 ↗
17. 10.1039/c2jm32344c10.1039/c2jm32344c ↗
18. 10.1016/j.ijhydene.2010.02.01310.1016/j.ijhydene.2010.02.013 ↗
19. 10.1016/j.ijhydene.2017.08.14510.1016/j.ijhydene.2017.08.145 ↗
20. 10.1016/j.apcatb.2017.12.02610.1016/j.apcatb.2017.12.026 ↗
21. 10.1021/acs.langmuir.7b0002910.1021/acs.langmuir.7b00029 ↗
22. 10.1039/C6DT04079A10.1039/C6DT04079A ↗
23. 10.1088/0953-8984/21/39/39550210.1088/0953-8984/21/39/395502 ↗
24. 10.1016/j.biomaterials.2012.03.05910.1016/j.biomaterials.2012.03.059 ↗
25. 10.1021/ja200012e10.1021/ja200012e ↗
26. 10.1039/C7NR08092A10.1039/C7NR08092A ↗
27. 10.1021/jacs.8b0451310.1021/jacs.8b04513 ↗
28. 10.1021/nn400826h10.1021/nn400826h ↗
29. 10.1016/j.jcat.2009.06.02410.1016/j.jcat.2009.06.024 ↗
30. 10.1039/c3ta12301d10.1039/c3ta12301d ↗
31. 10.1002/cssc.20140229710.1002/cssc.201402297 ↗
32. 10.1021/nn201681s10.1021/nn201681s ↗
33. 10.1002/adma.20080038410.1002/adma.200800384 ↗
34. 10.1021/ja061787h10.1021/ja061787h ↗
35. 10.1021/ja504097v10.1021/ja504097v ↗
36. 10.1016/j.jcat.2015.06.00510.1016/j.jcat.2015.06.005 ↗
37. 10.1016/j.apcatb.2015.09.03910.1016/j.apcatb.2015.09.039 ↗
38. 10.1016/0368-2048(78)85029-410.1016/0368-2048(78)85029-4 ↗
39. 10.1021/j100085a03510.1021/j100085a035 ↗
40. 10.1039/C8TA06417B10.1039/C8TA06417B ↗
41. 10.1016/0368-2048(90)87059-W10.1016/0368-2048(90)87059-W ↗
42. 10.1146/annurev.pc.15.100164.00110310.1146/annurev.pc.15.100164.001103 ↗
43. 10.1021/nl015559r10.1021/nl015559r ↗
44. 10.1039/c1cc14687d10.1039/c1cc14687d ↗
45. 10.1021/ja078270610.1021/ja0782706 ↗
46. van de Krol R. · 201210.1007/978-1-4614-1380-6 ↗
47. 10.1039/C6CS00918B10.1039/C6CS00918B ↗
48. 10.1016/j.joule.2017.12.00910.1016/j.joule.2017.12.009 ↗