Show simple item record

dc.contributor.authorWang, Ning
dc.contributor.authorCao, Zhen
dc.contributor.authorZheng, Xueli
dc.contributor.authorZhang, Bo
dc.contributor.authorKozlov, Sergey M
dc.contributor.authorChen, Peining
dc.contributor.authorZou, Chengqin
dc.contributor.authorKong, Xiangbin
dc.contributor.authorWen, Yunzhou
dc.contributor.authorLiu, Min
dc.contributor.authorZhou, Yansong
dc.contributor.authorDinh, Cao Thang
dc.contributor.authorZheng, Lirong
dc.contributor.authorPeng, Huisheng
dc.contributor.authorZhao, Ying
dc.contributor.authorCavallo, Luigi
dc.contributor.authorZhang, Xiaodan
dc.contributor.authorSargent, E.
dc.date.accessioned2020-01-20T10:25:27Z
dc.date.available2020-01-20T10:25:27Z
dc.date.issued2020-01-16
dc.identifier.citationWang, N., Cao, Z., Zheng, X., Zhang, B., Kozlov, S. M., Chen, P., … Sargent, E. H. (2020). Hydration-Effect-Promoting Ni–Fe Oxyhydroxide Catalysts for Neutral Water Oxidation. Advanced Materials, 1906806. doi:10.1002/adma.201906806
dc.identifier.doi10.1002/adma.201906806
dc.identifier.urihttp://hdl.handle.net/10754/661104
dc.description.abstractOxygen evolution reaction (OER) catalysts that function efficiently in pH-neutral electrolyte are of interest for biohybrid fuel and chemical production. The low concentration of reactant in neutral electrolyte mandates that OER catalysts provide both the water adsorption and dissociation steps. Here it is shown, using density functional theory simulations, that the addition of hydrated metal cations into a Ni-Fe framework contributes water adsorption functionality proximate to the active sites. Hydration-effect-promoting (HEP) metal cations such as Mg2+ and hydration-effect-limiting Ba2+ into Ni-Fe frameworks using a room-temperature sol-gel process are incorporated. The Ni-Fe-Mg catalysts exhibit an overpotential of 310 mV at 10 mA cm-2 in pH-neutral electrolytes and thus outperform iridium oxide (IrO2 ) electrocatalyst by a margin of 40 mV. The catalysts are stable over 900 h of continuous operation. Experimental studies and computational simulations reveal that HEP catalysts favor the molecular adsorption of water and its dissociation in pH-neutral electrolyte, indicating a strategy to enhance OER catalytic activity.
dc.description.sponsorshipN.W., Z.C., and X.Z. contributed equally to this work. This work was supported by the Ontario Research Fund – Research Excellence Program, the Natural Sciences and Engineering Research Council of Canada, and the CIFAR Bio-Inspired Solar Energy program. N.W. and X.D.Z. acknowledge support from International Cooperation Projects of the Ministry of Science and Technology (2014DFE60170), National Natural Science Foundation of China (61474065), and (61674084), Tianjin Research Key Program of Science and Technology (18ZXJMTG00220), 111 Project (B16027), and Fundamental Research Funds for the Central Universities. B.Z. and H.S.P. acknowledge funding from Ministry of Science and Technology (2016YFA0203302), the National Natural Science Foundation of China (21875042), and the Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning and Science and Technology Commission of Shanghai Municipality (18QA1400800). This work benefited from access to the 1W1B beamline at Beijing Synchrotron Radiation Facility. The TEM studies in this work were supported by Jingshan Luo. The simulations were performed using the KAUST supercomputer (HPC).
dc.publisherWiley
dc.relation.urlhttps://onlinelibrary.wiley.com/doi/abs/10.1002/adma.201906806
dc.rightsArchived with thanks to Advanced materials (Deerfield Beach, Fla.)
dc.titleHydration-Effect-Promoting Ni-Fe Oxyhydroxide Catalysts for Neutral Water Oxidation.
dc.typeArticle
dc.contributor.departmentChemical Science Program
dc.contributor.departmentKAUST Catalysis Center (KCC)
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalAdvanced materials (Deerfield Beach, Fla.)
dc.rights.embargodate2021-01-18
dc.eprint.versionPost-print
dc.contributor.institutionInstitute of Photoelectronic Thin Film Devices and Technology of Nankai University, Tianjin, 300350, P. R. China.
dc.contributor.institutionDepartment of Electrical and Computer Engineering, University of Toronto, 35 St George Street, Toronto, Ontario, M5S 1A4, Canada.
dc.contributor.institutionState Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science and Laboratory of Advanced Materials, Fudan University, Shanghai, 200438, China.
dc.contributor.institutionBeijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China.
kaust.personCao, Zhen
kaust.personKozlov, Sergey M
kaust.personCavallo, Luigi
refterms.dateFOA2020-01-20T12:13:47Z
kaust.acknowledged.supportUnitKAUST supercomputer
dc.date.published-online2020-01-16
dc.date.published-print2020-02


Files in this item

Thumbnail
Name:
adma201906806.pdf
Size:
2.084Mb
Format:
PDF
Description:
Accepted manuscript

This item appears in the following Collection(s)

Show simple item record