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butt: heteroatomic porous carbon nanosheets with edge-induced topological defects for enhanced oxygen evolution

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 11,   Pages 1755-1764 doi: 10.1007/s11705-023-2318-8

Abstract: Owing to the complexity of electron transfer pathways, the sluggish oxygen evolution reaction processIn this effort, metal nanoparticles (Co, Ni, Fe, etc.) encapsulated within nitrogen-doped carbon materialsusing cigarette butts as raw materials, which can drastically accelerate the overall rate of oxygen evolutionThe prepared catalyst of nitrogen-doped carbon porous nanosheets loaded with Co nanoparticles (Co@NC-500) exhibits enhanced catalytic activity toward oxygen evolution reaction, with a low overpotential

Keywords： oxygen evolution reaction     porous carbon nanosheets     Co nanoparticles     edge-induced topological defects    

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Co anchored on porphyrinic triazine-based frameworks with excellent biocompatibility for conversion ofCO in H-mediated microbial electrosynthesis

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 12,   Pages 1761-1771 doi: 10.1007/s11705-022-2195-6

Abstract: Microbial electrosynthesis is a promising alternative to directly convert CO2 into long-chainHowever, problems arose that the conventional electrocatalysts for hydrogen evolution may produce extensiveTo solve the bottleneck problem, Co anchored on porphyrinic triazine-based frameworks was synthesizedas the electrocatalyst for hydrogen evolution and further coupled with Cupriavidus necator H16low metal leaching and excellent stability were observed, which may be attributed to low content of Co

Keywords： microbial electrosynthesis     hydrogen evolution reaction     metalloporphyrins     biocompatibility     CO    

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Pocket Modification of ω-Amine Transaminase AtATA for Overcoming the Trade-Off between Activity and Stability Toward 1-Acetonaphthone Article

Jiaren Cao, Fangfang Fan, Changjiang Lyu, Sheng Hu, Weirui Zhao, Jiaqi Mei, Shuai Qiu, Lehe Mei, Jun Huang

Engineering 2023, Volume 30, Issue 11,   Pages 203-214 doi: 10.1016/j.eng.2023.04.009

Abstract:

Amine transaminases (ATAs) catalyze the asymmetric amination of prochiral ketones or aldehydes to their corresponding chiral amines. However, the trade-off between activity and stability in enzyme engineering represents a major obstacle to the practical application of ATAs. Overcoming this trade-off is important for developing robustly engineered enzymes and a universal approach for ATAs. Herein, we modified the binding pocket of ω-ATA from Aspergillus terreus (AtATA) to identify the key amino acid residues controlling the activity and stability of AtATA toward 1-acetonaphthone. We discovered a structural switch comprising four key amino acid sites (R128, V149, L182, and L187), as well as the "best" mutant (AtATA_D224K/V149A/L182F/L187F; termed M4). Compared to the parent enzyme AtATA_D224K (AtATA-Pa), M4 increased the catalytic efficiency (kcat/Km1-acetonaphthone, where kcat is 10.1 min–1, Km is 1.7 mmol·L–1) and half-life (t1/2) by 59-fold to 5.9 L·min–1·mmol–1 and by 1.6-fold to 46.9 min, respectively. Moreover, using M4 as the biocatalyst, we converted a 20 mmol·L–1 aliquot of 1-acetonaphthone in a 50 mL scaledup system to the desired product, (R)-(+)-1(1-naphthyl)ethylamine ((R)-NEA), with 78% yield and high enantiomeric purity (R > 99.5%) within 10 h. M4 also displayed significantly enhanced activity toward various 1-acetonaphthone analogs. The related structural properties derived by analyzing structure and sequence information of robust ATAs illustrated their enhanced activity and thermostability. Strengthening of intramolecular interactions and expansion of the angle between the substratebinding pocket and the pyridoxal 5′-phosphate (PLP)-binding pocket contributed to synchronous enhancement of ATA thermostability and activity. Moreover, this pocket engineering strategy successfully transferred enhanced activity and thermostability to three other ATAs, which exhibited 8%–22% sequence similarity with AtATA. This research has important implications for overcoming the trade-off between ATA activity and thermostability.

Keywords： Trade-off     Co-evolution     Amine transaminase     (R)-(+)-1(1-naphthyl)ethylamine    

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Crystallization and viscosity-temperature characteristics during co-gasification of industrial sludge

Linmin ZHANG, Bin LIU, Juntao WEI, Xudong SONG, Yonghui BAI, Jiaofei WANG, Ying ZHOU, Huijun YANG, Guangsuo YU

Frontiers in Energy 2022, Volume 16, Issue 6,   Pages 1037-1047 doi: 10.1007/s11708-022-0824-x

Abstract: Co-gasification of industrial sludge (IS) and coal was an effective approach to achieve harmless andThe long-term and stable operation of a co-gasification largely depends on fluidity of coal-ash slag.

Keywords： co-gasification     industrial sludge     crystallization     viscosity     mineral matter evolution    

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Improved Oxygen Evolution Kinetics and Surface States Passivation of Ni-Bi Co-Catalyst for Letter

Ke Dang,Tuo Wang,Chengcheng Li,Jijie Zhang,Shanshan Liu,Jinlong Gong

Engineering 2017, Volume 3, Issue 3,   Pages 285-289 doi: 10.1016/J.ENG.2017.03.005

Abstract: combinational surface kinetics enhancement and surface states passivation of nickel-borate (Ni-Bi) co-catalystborate (Bi) in the Ni-Bi film promotes the release of protons for the oxygen evolution

Keywords： Nickel-borate     Hematite     Oxygen evolution reaction     Co-catalyst    

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Reaction kinetics and internal diffusion of Zhundong char gasification with CO

Yun Liu, Jiangyuan Qu, Xuehui Wu, Kai Zhang, Yuan Zhang

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 2,   Pages 373-383 doi: 10.1007/s11705-020-1949-2

Abstract: The effect of internal diffusion on char gasification with CO in the temperature range from 1123 K to

Keywords： coal char     CO2 gasification     internal diffusion     pore evolution    

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Synthesis of cobalt vanadium nanomaterials for efficient electrocatalysis of oxygen evolution

Meifeng Hao, Mingshu Xiao, Lihong Qian, Yuqing Miao

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 3,   Pages 409-416 doi: 10.1007/s11705-017-1689-0

Abstract:

A low-cost and high-activity catalyst for oxygen evolution reaction (OER) is the key to the waterof three solvents, DMF, ethanol and glycol, in the solvothermal synthesis of three nano-catalysts, Co3(VO4)2-I, Co3(VO4)2-II, and CoCo3(VO4)2-I, II, and III existThese Co3(VO4)2 catalysts exhibit OER electrocatalysis, among which

Keywords： Co3(VO4)2     oxygen evolution reaction     electrocatalyst     water splitting    

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Tuned reactive power dispatch through modified differential evolution technique

S. BISWAS (RAHA), N. CHAKRABORTY

Frontiers in Energy 2012, Volume 6, Issue 2,   Pages 138-147 doi: 10.1007/s11708-012-0188-8

Abstract: This paper explores the capability of modified differential evolution (MDE) technique for solving theThe proposed method is based on the basic differential evolution (DE) technique with a few modifications

Keywords： reactive power dispatch (RPD)     modified differential evolution (MDE)     differential evolution algorithm    

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Strategic Thinking on a Revolution/an Evolution in Production and Consumption of Energy in China

Ke-chang Xie,Ke Liu

Frontiers of Engineering Management 2014, Volume 1, Issue 1,   Pages 30-36 doi: 10.15302/J-FEM-2014006

Abstract: This article summarizes the thinking behind the call for a revolution/an evolution in China's energyAction plans are presented to support the call for a revolution/an evolution in China's energy production

Keywords： revolution     evolution     energy     production     consumption    

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Polypyrrole@NiCo hybrid nanotube arrays as high performance electrocatalyst for hydrogen evolution reaction

Shenghua Ye, Gaoren Li

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 3,   Pages 473-480 doi: 10.1007/s11705-018-1724-9

Abstract: nanotube arrays have been successfully fabricated as a high performance electrocatalyst for hydrogen evolution

Keywords： NiCo alloy     polypyrrole     hybrid nanotube     electrocatalyst     hydrogen evolution reaction    

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Synergistic effect of V and Fe in Ni/Fe/V ternary layered double hydroxides for efficient and durable oxygen evolution

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 1,   Pages 102-115 doi: 10.1007/s11705-022-2179-6

Abstract: High-performance and stable electrocatalysts are vital for the oxygen evolution reaction (OER).

Keywords： oxygen evolution reaction     electrocatalysts     ternary layered double hydroxides     long-term stability    

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heterostructure grown on nickel foam as efficient and durable self-supported electrocatalysts for hydrogen evolution

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 4,   Pages 437-448 doi: 10.1007/s11705-022-2228-1

Abstract: High-performance and ultra-durable electrocatalysts are vital for hydrogen evolution reaction (HER) during

Keywords： molybdenum oxides     oxygen vacancies     heterostructure     electrocatalysts     hydrogen evolution reaction    

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Innovation evolution of China’s high-speed rail industry

Jin CHEN, Liang MEI

Frontiers of Engineering Management 2018, Volume 5, Issue 4,   Pages 548-552 doi: 10.15302/J-FEM-2018208

Abstract:
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The International Conference on the Evolution of China Urban Water Environment & Ecology, 2019

Jiuhui Qu

Frontiers of Environmental Science & Engineering 2019, Volume 13, Issue 6, doi: 10.1007/s11783-019-1179-3

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Title Author Date Type Operation

Xiao Yonghong: Co-evolution of Clinical Highly Resistant and Highly Toxic Pathogens (2023-2-22)

10 Mar 2023

Conference Videos

butt: heteroatomic porous carbon nanosheets with edge-induced topological defects for enhanced oxygen evolution

Journal Article

Co anchored on porphyrinic triazine-based frameworks with excellent biocompatibility for conversion ofCO in H-mediated microbial electrosynthesis

Journal Article

Pocket Modification of ω-Amine Transaminase AtATA for Overcoming the Trade-Off between Activity and Stability Toward 1-Acetonaphthone

Jiaren Cao, Fangfang Fan, Changjiang Lyu, Sheng Hu, Weirui Zhao, Jiaqi Mei, Shuai Qiu, Lehe Mei, Jun Huang

Journal Article

Crystallization and viscosity-temperature characteristics during co-gasification of industrial sludge

Linmin ZHANG, Bin LIU, Juntao WEI, Xudong SONG, Yonghui BAI, Jiaofei WANG, Ying ZHOU, Huijun YANG, Guangsuo YU

Journal Article

Improved Oxygen Evolution Kinetics and Surface States Passivation of Ni-Bi Co-Catalyst for

Ke Dang,Tuo Wang,Chengcheng Li,Jijie Zhang,Shanshan Liu,Jinlong Gong

Journal Article

Reaction kinetics and internal diffusion of Zhundong char gasification with CO

Yun Liu, Jiangyuan Qu, Xuehui Wu, Kai Zhang, Yuan Zhang

Journal Article

Synthesis of cobalt vanadium nanomaterials for efficient electrocatalysis of oxygen evolution

Meifeng Hao, Mingshu Xiao, Lihong Qian, Yuqing Miao

Journal Article

Tuned reactive power dispatch through modified differential evolution technique

S. BISWAS (RAHA), N. CHAKRABORTY

Journal Article

Strategic Thinking on a Revolution/an Evolution in Production and Consumption of Energy in China

Ke-chang Xie,Ke Liu

Journal Article

Polypyrrole@NiCo hybrid nanotube arrays as high performance electrocatalyst for hydrogen evolution reaction

Shenghua Ye, Gaoren Li

Journal Article

Synergistic effect of V and Fe in Ni/Fe/V ternary layered double hydroxides for efficient and durable oxygen evolution

Journal Article

heterostructure grown on nickel foam as efficient and durable self-supported electrocatalysts for hydrogen evolution

Journal Article

Innovation evolution of China’s high-speed rail industry

Jin CHEN, Liang MEI

Journal Article

The International Conference on the Evolution of China Urban Water Environment & Ecology, 2019

Jiuhui Qu

Journal Article