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Ni-foam supported Co(OH)F and Co-P nanoarrays for energy-efficient hydrogen production via urea electrolysis
Song, M; Zhang, ZJ; Li, QW; Jin, W; Wu, ZX; Fu, GT; Liu, X; Song, Min; Zhang, Zijin; Li, Qingwei; Jin, Wei; Wu, Zexing; Fu, Gengtao; Liu, Xien
2019
Source PublicationJOURNAL OF MATERIALS CHEMISTRY A
ISSN2050-7488
Volume7Issue:8Pages:3697
AbstractIt is an urgent requirement to develop non-precious metal-based catalysts with excellent electrocatalytic activity and stability to accelerate the development of hydrogen generation via energy-efficient routes. Herein, a facile and scalable strategy was developed to synthesize both rod-like Co(OH) F and Co-P nanoarrays supported on Ni-foam, denoted as Co(OH) F/NF and Co-P/NF, respectively. Electrochemical measurements demonstrate that Co-P/NF exhibits excellent electrocatalytic performance for the hydrogen evolution reaction (HER), delivering a low overpotential of 70 mV and 43 mV at 10 mA cm(-2) in alkaline and acid media, respectively. Furthermore, the as-prepared Co(OH) F/NF contributes to an outstanding oxygen evolution reaction (OER) performance with a low oxidation potential of about 1.5 V at 10 mA cm(-2). In addition, the Co(OH) F/NF also can enable highly efficient urea oxidation reaction (UOR) electrocatalysis, which can be utilized to substitute OER to lower the overpotential and thus reduce electrical energy consumption during H2-production. As a proof of concept, full water-splitting measurements were performed with Co-P/NF and Co(OH) F/NF as cathode and anode, respectively, in 1 M KOH with 0.7 M urea. The Co-P/NFkCo(OH) F/NF electrode is capable of producing a current density of 20 mA cm(-2) at a cell potential of only 1.42 V, which is 230 mV less than that for the urea-free counterpart, demonstrating its potential feasibility in practical applications of energy-efficient hydrogen production.
KeywordEVOLUTION REACTION NANOSHEET ARRAYS BIFUNCTIONAL ELECTROCATALYST ACTIVE ELECTROCATALYST CATALYSTS PERFORMANCE PHOSPHIDE MICROSPHERES GENERATION HYDROXIDE
SubtypeArticle
DOI10.1039/c8ta10985k
WOS IDWOS:000459331600021
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/28333
Collection中国科学院过程工程研究所
Recommended Citation
GB/T 7714
Song, M,Zhang, ZJ,Li, QW,et al. Ni-foam supported Co(OH)F and Co-P nanoarrays for energy-efficient hydrogen production via urea electrolysis[J]. JOURNAL OF MATERIALS CHEMISTRY A,2019,7(8):3697, 3703.
APA Song, M.,Zhang, ZJ.,Li, QW.,Jin, W.,Wu, ZX.,...&Liu, Xien.(2019).Ni-foam supported Co(OH)F and Co-P nanoarrays for energy-efficient hydrogen production via urea electrolysis.JOURNAL OF MATERIALS CHEMISTRY A,7(8),3697.
MLA Song, M,et al."Ni-foam supported Co(OH)F and Co-P nanoarrays for energy-efficient hydrogen production via urea electrolysis".JOURNAL OF MATERIALS CHEMISTRY A 7.8(2019):3697.
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