dc.creator | Yu C., Lu J., Luo L., Xu F., Shen P.K., Tsiakaras P., Yin S. | en |
dc.date.accessioned | 2023-01-31T11:37:57Z | |
dc.date.available | 2023-01-31T11:37:57Z | |
dc.date.issued | 2019 | |
dc.identifier | 10.1016/j.electacta.2019.01.149 | |
dc.identifier.issn | 00134686 | |
dc.identifier.uri | http://hdl.handle.net/11615/80899 | |
dc.description.abstract | In this work, CoNi oxyhydroxide nanosheets [CoNi-OOH-30(40)] are synthesized, through two simple steps, as efficient bifunctional catalysts in alkaline media. First, a shape-controlled CoNi-X alloy (X denotes electrodeposition time) with a ridge-like morphology that in-situ deposited on titanium sheets is obtained by electrodeposition. Then, CoNi-30 with ridge-like structure is further electrooxidized to improve the electrochemical activity. After 40 h oxidation, the CoNi-OOH-30(40) oxyhydroxide with nanosheets structure is obtained, which exhibits good catalytic performance for overall water splitting than the other as-prepared catalysts. It is found that CoNi-OOH-30(40) to reach ±10 mA cm −2 requires small overpotentials of −210 and 279 mV, Tafel slopes of 67 and 62 mV dec ˗1 and exhibit good stabilities for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in alkaline solution, respectively. A water electrolyzer, using CoNi-OOH-30(40) as anode and cathode catalysts, reaches 10 mA cm −2 at a voltage of 1.76 V. Furthermore, due to the Co‒Ni alloy and CoNi oxyhydroxide, CoNi-OOH-30(40) maintains 10 mA cm −2 for 60 h in alkaline media without activity losses. It is believed that the present work provides a facile, fast and feasible strategy to fabricate cost-efficient CoNi oxyhydroxide nanosheets catalysts with high water splitting efficiency and stability in alkaline conditions. © 2019 Elsevier Ltd | en |
dc.language.iso | en | en |
dc.source | Electrochimica Acta | en |
dc.source.uri | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85061652400&doi=10.1016%2fj.electacta.2019.01.149&partnerID=40&md5=e1518541e5aee029622b8628ba5c4942 | |
dc.subject | Binary alloys | en |
dc.subject | Catalytic oxidation | en |
dc.subject | Electrocatalysts | en |
dc.subject | Electrodeposition | en |
dc.subject | Electrodes | en |
dc.subject | Nanocatalysts | en |
dc.subject | Nanosheets | en |
dc.subject | Nickel alloys | en |
dc.subject | Nickel compounds | en |
dc.subject | Titanium sheet | en |
dc.subject | Bifunctional electrocatalysts | en |
dc.subject | Hydrogen evolution reactions | en |
dc.subject | Oxygen evolution reaction | en |
dc.subject | Oxyhydroxides | en |
dc.subject | Water splitting | en |
dc.subject | Cobalt alloys | en |
dc.subject | Elsevier Ltd | en |
dc.title | Bifunctional catalysts for overall water splitting: CoNi oxyhydroxide nanosheets electrodeposited on titanium sheets | en |
dc.type | journalArticle | en |