Lei Ji

Guangdong University of Technology

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Abdullah M. Asiri

King Abdulaziz University

Ya Zhang

Yangzhou University

Yonglan Luo

University of Electronic Science and Technology of China

Xuping Sun

Shandong Normal University

Shiyong Mou

University of Electronic Science and Technology of China

Xifeng Shi

Shandong Normal University

Tongwei Wu

University of Electronic Science and Technology of China

Patrik Schmuki

Friedrich-Alexander-Universität Erlangen-Nürnberg

Ting Wang

Shanxi Normal University

Xuping Sun

Shandong Normal University

Cooperative Institutions

University of Electronic Science and Technology of China

Chengdu University

Guangdong University of Technology

Chinese Academy of Sciences

Northwest University

Northeast Petroleum University

Shandong Normal University

Ministry of Education of the People's Republic of China

University of Jinan

Sichuan University

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Sulfur Incorporated CoFe2O4/Multiwalled Carbon Nanotubes toward Enhanced Oxygen Evolution Reaction

Electrochimica Acta (2017)

Xu Sun Lingfeng Gao Chengying Guo Yong Zhang Xuan Kuang

Overpotential

Oxygen evolution

10.1016/j.electacta.2017.07.091

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Citations (39)

Sulfur and Ti³⁺ co‐Doping of TiO₂ Nanotubes Enhance Photocatalytic H₂ Evolution Without the Use of Any co‐catalyst

Chemistry - An Asian Journal (2019)

Lei Ji Xuemei Zhou Patrik Schmuki

TiO2 nanotubes were successfully co-doped with sulfur and Ti3+ states using a facile annealing treatment in H2 /H2 S gas mixture. The obtained nanotubes were investigated for their photocatalytic performance and characterized by SEM, XRD, XPS, EPR, IPCE, IMPS and Mott-Schottky measurements. The synthesized co-doped TiO2 nanotubes show an enhanced photocatalytic hydrogen production rate compared to tubes that were treated only in pure H2 or H2 S atmosphere-this without the presence of any co-catalyst. It was found that sulfur in co-doped TiO2 exists in the form of S2- and a small quantity of S4+ /S6+ , which leads to a narrowing of the band gap. However, the enhanced absorption of light in the visible range is not the key reason for the improved photocatalytic performance. We ascribe the enhanced photocatalytic activity to a synergetic effect of S mid-gap states and disordered Ti3+ defects that facilitate photo generated electron transfer.

Visible spectrum

10.1002/asia.201900532

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Facile and controllable preparation of carbon microsphere for electro-driven nitrogen reduction: Accommodating nitrogen doping with hierarchical porous structure

Journal of Colloid and Interface Science (2022)

Dawei Liu Lei Ji Yan Nie Yong Li Xu Long

Carbon fibers

10.1016/j.jcis.2022.12.105

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Citations (1)

Highly Selective Electrochemical Reduction of CO₂ to Alcohols on an FeP Nanoarray

Angewandte Chemie (2019)

Lei Ji Lei Li Xuqiang Ji Ya Zhang Shiyong Mou

Abstract Electrochemical reduction of CO 2 into various chemicals and fuels provides an attractive pathway for environmental and energy sustainability. It is now shown that a FeP nanoarray on Ti mesh (FeP NA/TM) acts as an efficient 3D catalyst electrode for the CO 2 reduction reaction to convert CO 2 into alcohols with high selectivity. In 0.5 m KHCO 3 , such FeP NA/TM is capable of achieving a high Faradaic efficiency (FE ) up to 80.2 %, with a total FE of 94.3 % at −0.20 V vs. reversible hydrogen electrode. Density functional theory calculations reveal that the FeP(211) surface significantly promotes the adsorption and reduction of CO 2 toward CH 3 OH owing to the synergistic effect of two adjacent Fe atoms, and the potential‐determining step is the hydrogenation process of *CO.

Reversible hydrogen electrode

Selective Reduction

10.1002/ange.201912836

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Citations (32)

Hierarchical CoTe₂ Nanowire Array: An Effective Oxygen Evolution Catalyst in Alkaline Media

ACS Sustainable Chemistry & Engineering (2018)

Lei Ji Zhichao Wang Hui Wang Xifeng Shi Abdullah M. Asiri

In this Letter, we report the development of hierarchical CoTe2 nanowire array on Ti mesh (CoTe2 NA/TM) via topotactical conversion from its Co(OH)F precursor through hydrothermal tellurization reaction. As a 3D oxygen evolution electrocatalyst, such CoTe2 NA/TM exhibits excellent catalytic activity with an overpotential of 340 mV to attain 50 mA cm–2 in 1.0 M KOH. Notably, it also exhibits high durability for 25 h.

Overpotential

Oxygen evolution

10.1021/acssuschemeng.7b04309

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Citations (50)

Facile synthesis of ultra-fine nanoporous Pt co-catalyst decorated on P25 and its highly efficient photocatalytic activity

Ionics (2021)

Shuxia Guan Ruimin Yu Fanzuo Guo Yongkui Fang Lei Ji

Nanoporous

Methylene blue

10.1007/s11581-021-03958-6

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Electrochemically Faceted Bamboo‐type TiO₂ Nanotubes Provide Enhanced Open‐Circuit Hydrogen Evolution

ChemElectroChem (2018)

Lei Ji Xuemei Zhou Patrik Schmuki

Abstract In this paper we prepare facetted “black” TiO 2 nanotube arrays (NTAs) with a bamboo‐type structure which exhibits an enhanced performance for open‐circuit H 2 generation without the use of any noble metal co‐catalyst. The TiO 2 nanotubes were formed by applying alternating positive and negative voltages. During the electrochemical formation, not only a bamboo structure is formed but the tubes are reduced in the cathodic cycle. After a rapid annealing treatment of these tubes in air at 500 °C for 10 s, the bamboo rings (knots) provide (001) facets preferentially located at the knot, while (101) planes prevail on the smooth part of tube between knots, as shown by TEM. The short annealing time keeps Ti 3+ /oxygen vacancies (V O ) as co‐catalytically active centers still preserved in the TiO 2 NTAs. The results of intensity modulated photocurrent spectroscopy (IMPS) and open‐circuit potential decay measurements (V OC ) indicate that these faceted and reduced TiO 2 nanotube arrays provide an efficient separation and reaction of photo‐generated charge carriers, leading to an improved photocatalytic H 2 evolution performance.

Photocurrent

Open-circuit voltage

10.1002/celc.201800584

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One-Pot Synthesis of Pyrite Type Fes2/C by Microwave Heating Method and its Electrochemical Properties for Oxygen Evolution

SSRN Electronic Journal (2022)

Zejie Zhang WU Chang-yi Lei Ji Kaiwu Cai Chunpeng Wang

Iron disulfide is prepared by microwave heating with iron nitrate nonahydrate and thiourea (CH 4 N 2 S) as precursor. Pyrite catalyst FeS 2 is loaded on carbon support. FeS 2 nanoparticles are irregular spherical with a particle size of 10~30 nm and good dispersion. The current density of the FeS 2 /C electrode is 249 and 377 mA·cm -2 at 0.6 and 0.65 V (vs. Hg/HgO), respectively. The electrode shows good catalytic performance for OER. The composite bifunctional electrode using FeS 2 /C as oxygen precipitation catalyst and Co/C as oxygen reduction catalyst can be operated for 220 h at 20 mA·cm -2 , and its energy efficiency is only reduced by 7.75%. The reaction process of oxygen evolution reaction of FeS 2 /C is clarified. A layer of amorphous hydroxide is formed on the surface of sulfide, and then oxygen evolution is reacted by the synergistic action of hydroxide and sulfide.

Oxygen evolution

Microwave heating

10.2139/ssrn.4105052

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In situ synthesis and photocatalytic hydrogen production of plate‐like Cu‐doped TiO ₂ polycrystal with crystal‐axis orientation

Micro & Nano Letters (2020)

Lei Ji Xing Wang Jinhong Zhou Xingang Kong

The Cu‐doped TiO 2 plate‐like particle was synthesised via using the layered H 1.07 Ti 1.73 O 4 ·H 2 O (HTO) plate‐like particle as a precursor. The Cu‐doped TiO 2 particle consists of nanocrystals and holes, and these nanocrystals are oriented at [ ]‐crystal‐axis direction. Firstly, the HTO particle was treated in a copper acetate solution, forming Cu 2+ ‐exchanged HTO plate‐like particles. And then Cu 2+ ‐exchanged HTO in situ transformed into Cu‐doped TiO 2 via heat‐treating and further acid washing. The Cu‐doped TiO 2 particle has a stronger absorption in the visible light region of 400–800 nm and the visible photocatalytic H 2 production activity.

Crystal (programming language)

10.1049/mnl.2019.0503

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Citations (1)

Highly Selective Electrochemical Reduction of CO₂ to Alcohols on an FeP Nanoarray

Angewandte Chemie International Edition (2019)

Lei Ji Lei Li Xuqiang Ji Ya Zhang Shiyong Mou

Electrochemical reduction of CO2 into various chemicals and fuels provides an attractive pathway for environmental and energy sustainability. It is now shown that a FeP nanoarray on Ti mesh (FeP NA/TM) acts as an efficient 3D catalyst electrode for the CO2 reduction reaction to convert CO2 into alcohols with high selectivity. In 0.5 m KHCO3 , such FeP NA/TM is capable of achieving a high Faradaic efficiency (FE CH3OH ) up to 80.2 %, with a total FE CH3OH+C2H5OH of 94.3 % at -0.20 V vs. reversible hydrogen electrode. Density functional theory calculations reveal that the FeP(211) surface significantly promotes the adsorption and reduction of CO2 toward CH3 OH owing to the synergistic effect of two adjacent Fe atoms, and the potential-determining step is the hydrogenation process of *CO.

Reversible hydrogen electrode

10.1002/anie.201912836

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Citations (179)