Show simple item record

dc.contributor.authorWen, Chun Fang
dc.contributor.authorMao, Fangxin
dc.contributor.authorLiu, Yuanwei
dc.contributor.authorZhang, Xin Yu
dc.contributor.authorFu, Huai Qin
dc.contributor.authorZheng, Li Rong
dc.contributor.authorLiu, Peng Fei
dc.contributor.authorYang, Hua Gui
dc.date.accessioned2021-10-13T03:48:29Z
dc.date.available2021-10-13T03:48:29Z
dc.date.issued2020
dc.identifier.issn2155-5435
dc.identifier.doi10.1021/acscatal.9b02978
dc.identifier.urihttp://hdl.handle.net/10072/408995
dc.description.abstractSingle-atom catalysts have found considerable applications in the field of electrochemical CO2 reduction reaction (CO2RR) due to their unique coordination environments. However, during the preparation of single-atom catalysts, some metal nanoparticles (NPs) are inevitably generated, which suffer from low selectivity in CO2RR. In this regard, complex postprocessing solution treatments are usually conducted to remove metal NPs using acid. Herein, we fabricated Ni(NC)-based catalysts composed of single Ni atoms and Ni NPs, both of which feature local Ni-N coordination via a simple Ni-metal organic framework (MOF)-assisted strategy. Based on X-ray photoelectron spectroscopy (XPS) and X-ray absorption fine structure (XAFS) spectroscopy measurements, nitrogen species in N-doped carbon have been demonstrated to be coordinated with surface nickel species to form Ni-N motifs, which makes Ni at a low-valent state for efficient CO2RR. Consequently, the catalyst exhibited high performances toward CO2RR with CO Faradic efficiencies (FECO) maintained over 90% from -0.65 to -0.90 V vs reversible hydrogen electrode (RHE). More importantly, the FECO of 99% could be obtained at a considerable current density (j) of -160 mA cm-2 in a flow cell configuration. These findings suggest that regulating the surface environment of Ni species can activate the original inert reaction sites into active reaction sites, providing a promising avenue to design high-performance electrocatalysts for CO2RR.
dc.description.peerreviewedYes
dc.languageEnglish
dc.publisherAmerican Chemical Society (ACS Publications)
dc.relation.ispartofpagefrom1086
dc.relation.ispartofpageto1093
dc.relation.ispartofissue2
dc.relation.ispartofjournalACS Catalysis
dc.relation.ispartofvolume10
dc.subject.fieldofresearchInorganic chemistry
dc.subject.fieldofresearchOrganic chemistry
dc.subject.fieldofresearchChemical engineering
dc.subject.fieldofresearchIndustrial biotechnology
dc.subject.fieldofresearchPhysical chemistry
dc.subject.fieldofresearchcode3402
dc.subject.fieldofresearchcode3405
dc.subject.fieldofresearchcode4004
dc.subject.fieldofresearchcode3106
dc.subject.fieldofresearchcode3406
dc.subject.keywordsScience & Technology
dc.subject.keywordsPhysical Sciences
dc.subject.keywordsChemistry, Physical
dc.subject.keywordsChemistry
dc.subject.keywordsCO2 reduction reaction
dc.titleNitrogen-Stabilized Low-Valent Ni Motifs for Efficient CO2 Electrocatalysis
dc.typeJournal article
dc.type.descriptionC1 - Articles
dcterms.bibliographicCitationWen, CF; Mao, F; Liu, Y; Zhang, XY; Fu, HQ; Zheng, LR; Liu, PF; Yang, HG, Nitrogen-Stabilized Low-Valent Ni Motifs for Efficient CO2 Electrocatalysis, ACS Catalysis, 2020, 10 (2), pp. 1086-1093
dc.date.updated2021-10-13T03:47:37Z
gro.hasfulltextNo Full Text
gro.griffith.authorFu, Huai Qin


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

  • Journal articles
    Contains articles published by Griffith authors in scholarly journals.

Show simple item record