Selectively Etching Vanadium Oxide to Modulate Surface Vacancies of Unary Metal-Based Electrocatalysts for High-Performance Water Oxidation

Fan, Ke1; Zou, Haiyuan2,3,4; Duan, Lele2,3; Sun, Licheng1,5

2019-12-13

10.1002/aenm.201903571

Advanced Energy Materials   影响因子和分区

1614-6832

1614-6840

Electrocatalytic water splitting for hydrogen generation is hindered by the sluggish kinetics of water oxidation, and highly efficient electrocatalysts for the oxygen evolution reaction (OER) are urgently required. Numerous bi- and multimetal-based, low-cost, high-performance OER electrocatalysts have been developed. However, unary metal-based high-performance electrocatalysts are seldom reported. In the present study, Co-2(OH)(3)Cl/vanadium oxide (VOy) composites are synthesized, from which VOy is completely etched out by a simple cyclic voltammetry treatment, which simultaneously transforms Co-2(OH)(3)Cl in situ to ultrafine CoOOH. The selective removal of VOy modulates the nature of the surface in the obtained CoOOH by creating surface oxygen vacancies (V-o), along with disordered grain boundaries. The best-performing CoOOH with optimum V-o is found to be associated with a low overpotential of 282 mV at 10 mA cm(-2) catalytic current density on a simple glassy carbon electrode for OER. This facile protocol of selectively etching VOy to modulate the nature of the surface is successfully applied to synthesize another Fe-based electrocatalyst with high OER performance, thus establishing its utility for unary metal-based electrocatalyst synthesis.

electrocatalysis in situ transformation vacancies water oxidation

SCI ; EI

英语

其他

Guangdong Provincial Key Laboratory of Energy Materials for Electric Power[2018B030322001]

Chemistry ; Energy & Fuels ; Materials Science ; Physics

Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000502400200001

WILEY-V C H VERLAG GMBH

20195107838696

Carbon dioxide ; Chlorine compounds ; Cyclic voltammetry ; Electrocatalysis ; Electrocatalysts ; Electrolysis ; Etching ; Glass membrane electrodes ; Grain boundaries ; Hydrogen production ; Oxidation ; Reaction kinetics ; Vacancies

Gas Fuels:522 ; Electric Components:704.1 ; Electrochemistry:801.4.1 ; Chemical Reactions:802.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Inorganic Compounds:804.2 ; Crystalline Solids:933.1

Web of Science

1.Dalian Univ Technol, DUT KTH Joint Educ & Res Ctr Mol Devices, Inst Artificial Photosynth, State Key Lab Fine Chem, Dalian 116024, Peoples R China
2.Southern Univ Sci & Technol, Shenzhen Grubbs Inst, Dept Chem, Shenzhen 518055, Guangdong, Peoples R China
3.Southern Univ Sci & Technol, Guangdong Prov Key Lab Energy Mat Elect Power, Shenzhen 518055, Guangdong, Peoples R China
4.Harbin Inst Technol, Sch Chem & Chem Engn, Harbin 150001, Heilongjiang, Peoples R China
5.KTH Royal Inst Technol, Dept Chem, S-10044 Stockholm, Sweden

Fan, Ke,Zou, Haiyuan,Duan, Lele,et al. Selectively Etching Vanadium Oxide to Modulate Surface Vacancies of Unary Metal-Based Electrocatalysts for High-Performance Water Oxidation[J]. Advanced Energy Materials,2019,10(5).

Fan, Ke,Zou, Haiyuan,Duan, Lele,&Sun, Licheng.(2019).Selectively Etching Vanadium Oxide to Modulate Surface Vacancies of Unary Metal-Based Electrocatalysts for High-Performance Water Oxidation.Advanced Energy Materials,10(5).

Fan, Ke,et al."Selectively Etching Vanadium Oxide to Modulate Surface Vacancies of Unary Metal-Based Electrocatalysts for High-Performance Water Oxidation".Advanced Energy Materials 10.5(2019).