Surface galvanic formation of Co-OH on Birnessite and its catalytic activity for the oxygen evolution reaction

Pu，Yayun1,2; Celorrio，Veronica3; Stockmann，Jöerg M.4; Sobol，Oded4; Sun，Zongzhao2; Wang，Wu5; Lawrence，Matthew J.1; Radnik，Jörg4; Russell，Andrea E.6; Hodoroaba，Vasile Dan4; Huang，Limin2; Rodriguez，Paramaconi1

2021-04-01

10.1016/j.jcat.2021.02.025

JOURNAL OF CATALYSIS   影响因子和分区

0021-9517

1090-2694

Low-cost, high-efficient catalysts for water splitting can be potentially fulfilled by developing earth-abundant metal oxides. In this work, surface galvanic formation of Co-OH on KMnO (KMO) was achieved via the redox reaction of hydrated Co with crystalline Mn. The synthesis method takes place at ambient temperature without using any surfactant agent or organic solvent, providing a clean, green route for the design of highly efficient catalysts. The redox reaction resulted in the formation of ultrathin Co-OH nanoflakes with high electrochemical surface area. X-ray absorption spectroscopy (XAS) and X-ray photoelectron spectroscopy (XPS) analysis confirmed the changes in the oxidation state of the bulk and surface species on the Co-OH nanoflakes supported on the KMO. The effect of the anions, such as chloride, nitrate and sulfate, on the preparation of the catalyst was evaluated by electrochemical and spectrochemical means. XPS and Time of flight secondary ion mass spectrometry (ToF-SIMS) analysis demonstrated that the layer of CoOH deposited on the KMO and its electronic structure strongly depend on the anion of the precursor used during the synthesis of the catalyst. In particular, it was found that Cl favors the formation of Co-OH, changing the rate-determining step of the reaction, which enhances the catalytic activity towards the OER, producing the most active OER catalyst in alkaline media.

Anion effect Layered manganese oxide Oxygen evolution reaction Surface galvanic synthesis

SCI ; EI

英语

通讯

Guangdong Provincial Key Laboratory of Energy Materials for Electric Power[2018B030322001] ; Guangdong Provincial Key Laboratory of Catalysis[2020B121201002] ; Shenzhen Clean Energy Research Institute[CERIKY2019003] ; Shenzhen Key Laboratory of Solid State Batteries[ZDSYS20180208184346531]

Chemistry ; Engineering

Chemistry, Physical ; Engineering, Chemical

WOS:000641071900013

ACADEMIC PRESS INC ELSEVIER SCIENCE

20211310135220

Chlorine compounds ; Cobalt metallography ; Electronic structure ; Manganese compounds ; Negative ions ; Organic polymers ; Oxygen ; Oxygen evolution reaction ; Redox reactions ; Secondary ion mass spectrometry ; Sulfur compounds ; X ray absorption spectroscopy ; X ray photoelectron spectroscopy

Metallography:531.2 ; Chemical Reactions:802.2 ; Chemical Products Generally:804 ; Organic Polymers:815.1.1 ; Atomic and Molecular Physics:931.3

CHEMISTRY

2-s2.0-85103039077

Scopus

1.School of Chemistry,University of Birmingham,Birmingham,Edgbaston,B15 2TT,United Kingdom
2.Department of Chemistry,Southern University of Science and Technology,Shenzhen,No. 1088 Xueyuan Blvd,518055,China
3.Diamond Light Source Ltd,Diamond House,Harwell Campus,Didcot,OX11 0DE,United Kingdom
4.Bundesanstalt für Materialforschung und -prüfung (BAM),Division 6.1 Surface Analysis and Interfacial Chemistry,Berlin,Unter den Eichen 44-46,12203,Germany
5.Department of Physics,Southern University of Science and Technology,Shenzhen,China
6.School of Chemistry,University of Southampton,Southampton,Highfield,SO17 1BJ,United Kingdom

Pu，Yayun,Celorrio，Veronica,Stockmann，Jöerg M.,et al. Surface galvanic formation of Co-OH on Birnessite and its catalytic activity for the oxygen evolution reaction[J]. JOURNAL OF CATALYSIS,2021,396:304-314.

Pu，Yayun.,Celorrio，Veronica.,Stockmann，Jöerg M..,Sobol，Oded.,Sun，Zongzhao.,...&Rodriguez，Paramaconi.(2021).Surface galvanic formation of Co-OH on Birnessite and its catalytic activity for the oxygen evolution reaction.JOURNAL OF CATALYSIS,396,304-314.

Pu，Yayun,et al."Surface galvanic formation of Co-OH on Birnessite and its catalytic activity for the oxygen evolution reaction".JOURNAL OF CATALYSIS 396(2021):304-314.