Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 이영미 | * |
dc.contributor.author | 김명화 | * |
dc.date.accessioned | 2024-02-15T05:11:51Z | - |
dc.date.available | 2024-02-15T05:11:51Z | - |
dc.date.issued | 2023 | * |
dc.identifier.issn | 2168-0485 | * |
dc.identifier.other | OAK-34356 | * |
dc.identifier.uri | https://dspace.ewha.ac.kr/handle/2015.oak/267784 | - |
dc.description.abstract | Electrochemical water splitting holds great promise as a viable method to produce a sustainable hydrogen fuel. Spinel crystal structure (AB2O4) is regarded as a promising electrocatalyst for the anodic oxygen evolution reaction (OER) of water electrolysis. Fine-tuning of metal cations’ composition at the tetrahedral (A) and octahedral (B) sites within the well-defined spinel structure plays a critical role in determining the electroactivities for electrochemical reactions, including the OER. Herein, we report the rational incorporation of rhodium ions into the B sites of the spinel lattice of Co3O4 to form the CoxRh3-xO4 solid solution via an ecofriendly acid-base reaction between metal (Co, Rh) chlorides and NaOH in an aqueous solution, followed by the thermal annealing process. Among the CoxRh3-xO4 series, Co1.47Rh1.53O4 nanoparticles represented superior OER catalytic performances in alkaline conditions, verified by the lowest onset potential, small Tafel slope, and excellent long-term stability. The combination of experimental data with theoretical simulations suggests that the moderate d-band center (ϵd) energy levels are responsible for the enhanced activity by tuning the adsorption and desorption strengths of oxygen-containing intermediates, such as *OH, *O, and *OOH species. Our findings introduce a straightforward and environmentally friendly synthetic methodology for a single phase of spinel Co1.47Rh1.53O4 nanoparticles, resulting in a rational lattice structure that can be applied as an effective OER catalyst electrode. © 2023 American Chemical Society | * |
dc.language | English | * |
dc.publisher | American Chemical Society | * |
dc.subject | Acid−base reaction | * |
dc.subject | Density functional theory (DFT) simulation | * |
dc.subject | Oxygen evolution reaction (OER) | * |
dc.subject | Spinel Co<sub>x</sub>Rh<sub>3−x</sub>O<sub>4</sub> | * |
dc.title | Rational Lattice Engineering of Spinel CoxRh3-xO4 Solid Solution Expediting Oxygen Evolution Reaction | * |
dc.type | Article | * |
dc.relation.issue | 45 | * |
dc.relation.volume | 11 | * |
dc.relation.index | SCIE | * |
dc.relation.index | SCOPUS | * |
dc.relation.startpage | 16205 | * |
dc.relation.lastpage | 16216 | * |
dc.relation.journaltitle | ACS Sustainable Chemistry and Engineering | * |
dc.identifier.doi | 10.1021/acssuschemeng.3c04304 | * |
dc.identifier.wosid | WOS:001096781700001 | * |
dc.identifier.scopusid | 2-s2.0-85178067399 | * |
dc.author.google | Woo | * |
dc.author.google | Hyerim | * |
dc.author.google | Kwon | * |
dc.author.google | Taehui | * |
dc.author.google | Prabhakaran | * |
dc.author.google | Sampath | * |
dc.author.google | Lee | * |
dc.author.google | Youngmi | * |
dc.author.google | Kim | * |
dc.author.google | Do Hwan | * |
dc.author.google | Myung Hwa | * |
dc.contributor.scopusid | 이영미(35237907700) | * |
dc.contributor.scopusid | 김명화(57191596821) | * |
dc.date.modifydate | 20240422130854 | * |