Self-Supported Iridium Oxide Nanostructures for Electrocatalytic Water Oxidation in Acidic Media
Source abstract
Abstract
One major obstacle in the advancement of proton exchange membrane (PEM) technology is the development of highly active and durable electrocatalysts for the oxygen evolution reaction (OER) in an acid environment. In comparison with conventional catalysts in the powdery form, the self-supported nanostructures are more promising for practical applications. However, the preparation of self-supported nanocatalysts with high stability in acidic media remains challenging. Herein, IrO x nanostructures anchored on carbon cloth were prepared by a facile two-step method, which involved a fast dip-coating process and a subsequent annealing treatment under different temperatures. High hydroxide contents and mixed valence of iridium were observed for the obtained samples. By optimizing the annealing temperature, we achieved a low overpotential of 220 mV at the current density of 20 mA cm –2 . The optimal activity was attributed to a balance between hydroxide content and electrochemical surface area. Moreover, the self-supported IrO x nanostructure showed a good stability over 50 h.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Electrocatalysts for Energy Conversion · Fuel Cells and Related Materials · Advanced battery technologies research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, China
Key Laboratory of Materials Processing and Mold (Zhengzhou University), Ministry of Education, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou, 450001, China
Integrated Composites Laboratory (ICL), Department of Chemical & Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
Henan Provincial Key Laboratory of Surface and Interface Science, Zhengzhou University of Light Industry, No. 136, Science Avenue, Zhengzhou, 450001, China
School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, China
Department of Chemistry, Tsinghua University, Beijing, 100084, China
References (60)
Show source-provided references
1. 10.1007/s12274-016-1244-110.1007/s12274-016-1244-1 ↗
2. 10.1039/C8NR04513E10.1039/C8NR04513E ↗
3. 10.1038/nmat483410.1038/nmat4834 ↗
4. 10.1016/j.electacta.2019.01.01210.1016/j.electacta.2019.01.012 ↗
5. 10.1002/anie.20190619110.1002/anie.201906191 ↗
6. 10.1016/j.electacta.2019.13482610.1016/j.electacta.2019.134826 ↗
7. 10.1039/C9DT00615J10.1039/C9DT00615J ↗
8. 10.1016/j.jcat.2019.07.05510.1016/j.jcat.2019.07.055 ↗
9. Electricity Statistics. International Energy Agency. 2019, https://www.iea.org/statistics/electricity/.
10. 10.1038/nature1147510.1038/nature11475 ↗
11. 10.1166/sam.2019.355910.1166/sam.2019.3559 ↗
12. 10.1166/sam.2019.352610.1166/sam.2019.3526 ↗
13. 10.1038/3510459910.1038/35104599 ↗
14. 10.1073/pnas.060339510310.1073/pnas.0603395103 ↗
15. 10.1002/celc.20190068810.1002/celc.201900688 ↗
16. 10.1039/C9NR07060E10.1039/C9NR07060E ↗
17. 10.1021/acsami.9b0761010.1021/acsami.9b07610 ↗
18. 10.1109/TIE.2006.87835610.1109/TIE.2006.878356 ↗
19. 10.1039/C9CC04559G10.1039/C9CC04559G ↗
20. 10.1039/C9DT01218D10.1039/C9DT01218D ↗
21. 10.1002/cctc.20190009510.1002/cctc.201900095 ↗
22. 10.1039/C4CS00470A10.1039/C4CS00470A ↗
23. 10.1002/cssc.20180287310.1002/cssc.201802873 ↗
24. 10.1039/C9TA09188B10.1039/C9TA09188B ↗
25. 10.1016/j.ijhydene.2013.01.15110.1016/j.ijhydene.2013.01.151 ↗
26. 10.1002/aenm.20160127510.1002/aenm.201601275 ↗
27. 10.1021/jp407260v10.1021/jp407260v ↗
28. 10.1016/j.apcatb.2017.06.04410.1016/j.apcatb.2017.06.044 ↗
29. 10.1002/adma.20180135110.1002/adma.201801351 ↗
30. 10.1126/science.aaf505010.1126/science.aaf5050 ↗
31. 10.1002/aenm.20150099110.1002/aenm.201500991 ↗
32. 10.1038/s41467-018-07678-w10.1038/s41467-018-07678-w ↗
33. 10.1016/j.electacta.2011.09.02410.1016/j.electacta.2011.09.024 ↗
34. 10.1039/C7EE02307C10.1039/C7EE02307C ↗
35. 10.1021/acs.nanolett.5b0044610.1021/acs.nanolett.5b00446 ↗
36. 10.1126/science.aad499810.1126/science.aad4998 ↗
37. 10.1021/acs.jchemed.6b0061110.1021/acs.jchemed.6b00611 ↗
38. 10.1021/acscatal.6b0324610.1021/acscatal.6b03246 ↗
39. 10.1021/acsnano.8b0402310.1021/acsnano.8b04023 ↗
40. 10.1002/adfm.20170088610.1002/adfm.201700886 ↗
41. 10.1021/acsami.8b0871710.1021/acsami.8b08717 ↗
42. 10.1021/acscatal.7b0208210.1021/acscatal.7b02082 ↗
43. 10.1002/adma.20190051010.1002/adma.201900510 ↗
44. 10.1039/C7NR09377B10.1039/C7NR09377B ↗
45. 10.1021/acscatal.8b0171510.1021/acscatal.8b01715 ↗
46. 10.1039/C7NR04187J10.1039/C7NR04187J ↗
47. 10.1021/cm404171510.1021/cm4041715 ↗
48. 10.1021/acs.jpcc.8b0387410.1021/acs.jpcc.8b03874 ↗
49. 10.1016/j.apcatb.2018.07.06410.1016/j.apcatb.2018.07.064 ↗
50. 10.1021/acs.chemmater.6b0262510.1021/acs.chemmater.6b02625 ↗
51. 10.1038/s41467-018-08144-310.1038/s41467-018-08144-3 ↗
52. 10.1021/ja407115p10.1021/ja407115p ↗
53. 10.1039/C8NR03554G10.1039/C8NR03554G ↗
54. 10.1016/j.jcat.2019.01.01810.1016/j.jcat.2019.01.018 ↗
55. 10.1039/C5CP06997A10.1039/C5CP06997A ↗
56. 10.1039/C6SC04622C10.1039/C6SC04622C ↗
57. 10.1016/S0008-6223(97)00096-110.1016/S0008-6223(97)00096-1 ↗
58. 10.1039/C6SC01860B10.1039/C6SC01860B ↗
59. 10.1002/cssc.20170129110.1002/cssc.201701291 ↗
60. 10.1016/S0013-4686(03)00611-X10.1016/S0013-4686(03)00611-X ↗