Core–Shell Structured NiFeSn@NiFe (Oxy)Hydroxide Nanospheres from an Electrochemical Strategy for Electrocatalytic Oxygen Evolution Reaction
Abstract Efficient electrocatalysts for the oxygen evolution reaction (OER) are highly desirable because of the intrinsically sluggish kinetics of OER. Herein, core–shell structured nanospheres of NiFexSn@NiFe (oxy)hydroxide (denoted as NiFexSn‐A) are prepared as active OER catalysts by a facile ele...
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| Format: | Article |
| Language: | English |
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Wiley
2020-05-01
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.201903777 |
| _version_ | 1818291016947466240 |
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| author | Mingxing Chen Shenglin Lu Xian‐Zhu Fu Jing‐Li Luo |
| author_facet | Mingxing Chen Shenglin Lu Xian‐Zhu Fu Jing‐Li Luo |
| author_sort | Mingxing Chen |
| collection | DOAJ |
| description | Abstract Efficient electrocatalysts for the oxygen evolution reaction (OER) are highly desirable because of the intrinsically sluggish kinetics of OER. Herein, core–shell structured nanospheres of NiFexSn@NiFe (oxy)hydroxide (denoted as NiFexSn‐A) are prepared as active OER catalysts by a facile electrochemical strategy, which includes electrodeposition of NiFexSn alloy nanospheres on carbon cloth (CC) and following anodization. The alloy core of NiFexSn could promote charge transfer, and the amorphous shell of NiFe (oxy)hydroxide is defect‐rich and nanoporous due to the selective electrochemical etching of Sn in alkaline medium. The optimized catalyst of NiFe0.5Sn‐A displays a remarkable OER performance with a low overpotential of 260 mV to reach the current density of 10 mA cm−2, a small Tafel slope of 50 mV dec−1, a high turnover frequency of 0.194 s−1 at an overpotential of 300 mV, and a robust durability. Further characterizations indicate that the superior OER performance of the core–shell structured NiFe0.5Sn‐A nanospheres might originate from abundant active sites and small charge transfer resistance. This work brings a new perspective to the design and synthesis of core–shell structured nanospheres for electrocatalysis through a facile electrochemical strategy. |
| first_indexed | 2024-12-13T02:37:22Z |
| format | Article |
| id | doaj.art-d71c9123d7554701898a083632c2aebd |
| institution | Directory Open Access Journal |
| issn | 2198-3844 |
| language | English |
| last_indexed | 2024-12-13T02:37:22Z |
| publishDate | 2020-05-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj.art-d71c9123d7554701898a083632c2aebd2022-12-22T00:02:22ZengWileyAdvanced Science2198-38442020-05-01710n/an/a10.1002/advs.201903777Core–Shell Structured NiFeSn@NiFe (Oxy)Hydroxide Nanospheres from an Electrochemical Strategy for Electrocatalytic Oxygen Evolution ReactionMingxing Chen0Shenglin Lu1Xian‐Zhu Fu2Jing‐Li Luo3College of Materials Science and Engineering Shenzhen University Shenzhen 518060 ChinaCollege of Materials Science and Engineering Shenzhen University Shenzhen 518060 ChinaCollege of Materials Science and Engineering Shenzhen University Shenzhen 518060 ChinaCollege of Materials Science and Engineering Shenzhen University Shenzhen 518060 ChinaAbstract Efficient electrocatalysts for the oxygen evolution reaction (OER) are highly desirable because of the intrinsically sluggish kinetics of OER. Herein, core–shell structured nanospheres of NiFexSn@NiFe (oxy)hydroxide (denoted as NiFexSn‐A) are prepared as active OER catalysts by a facile electrochemical strategy, which includes electrodeposition of NiFexSn alloy nanospheres on carbon cloth (CC) and following anodization. The alloy core of NiFexSn could promote charge transfer, and the amorphous shell of NiFe (oxy)hydroxide is defect‐rich and nanoporous due to the selective electrochemical etching of Sn in alkaline medium. The optimized catalyst of NiFe0.5Sn‐A displays a remarkable OER performance with a low overpotential of 260 mV to reach the current density of 10 mA cm−2, a small Tafel slope of 50 mV dec−1, a high turnover frequency of 0.194 s−1 at an overpotential of 300 mV, and a robust durability. Further characterizations indicate that the superior OER performance of the core–shell structured NiFe0.5Sn‐A nanospheres might originate from abundant active sites and small charge transfer resistance. This work brings a new perspective to the design and synthesis of core–shell structured nanospheres for electrocatalysis through a facile electrochemical strategy.https://doi.org/10.1002/advs.201903777alloy nanospherescore–shell structured nanosphereselectrocatalystselectrocatalytic water oxidationelectrochemical etchingelectrodeposition |
| spellingShingle | Mingxing Chen Shenglin Lu Xian‐Zhu Fu Jing‐Li Luo Core–Shell Structured NiFeSn@NiFe (Oxy)Hydroxide Nanospheres from an Electrochemical Strategy for Electrocatalytic Oxygen Evolution Reaction Advanced Science alloy nanospheres core–shell structured nanospheres electrocatalysts electrocatalytic water oxidation electrochemical etching electrodeposition |
| title | Core–Shell Structured NiFeSn@NiFe (Oxy)Hydroxide Nanospheres from an Electrochemical Strategy for Electrocatalytic Oxygen Evolution Reaction |
| title_full | Core–Shell Structured NiFeSn@NiFe (Oxy)Hydroxide Nanospheres from an Electrochemical Strategy for Electrocatalytic Oxygen Evolution Reaction |
| title_fullStr | Core–Shell Structured NiFeSn@NiFe (Oxy)Hydroxide Nanospheres from an Electrochemical Strategy for Electrocatalytic Oxygen Evolution Reaction |
| title_full_unstemmed | Core–Shell Structured NiFeSn@NiFe (Oxy)Hydroxide Nanospheres from an Electrochemical Strategy for Electrocatalytic Oxygen Evolution Reaction |
| title_short | Core–Shell Structured NiFeSn@NiFe (Oxy)Hydroxide Nanospheres from an Electrochemical Strategy for Electrocatalytic Oxygen Evolution Reaction |
| title_sort | core shell structured nifesn nife oxy hydroxide nanospheres from an electrochemical strategy for electrocatalytic oxygen evolution reaction |
| topic | alloy nanospheres core–shell structured nanospheres electrocatalysts electrocatalytic water oxidation electrochemical etching electrodeposition |
| url | https://doi.org/10.1002/advs.201903777 |
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