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Semi-closed synthesis of nitrogen a.d oxygen Co-doped mesoporous ca.bon for selective a.ueous oxida.ion

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Green Energy & Environment 2022年第1期7卷 43-52页

作者： Chen Xing Da.hui Ya.g Ya. Zha.g Tia. Sun Junfei Dua. hussein a.younus Shiguo Zha.g College of Ma.eria.s Science a.d Engineering Hunan Province Key Laboratory for Advanced Carbon Materials and Applied TechnologyHunan UniversityChangsha410082China School of Ma.eria.s Science a.d Engineering Changsha University of Science and TechnologyChangsha410004China Chemistry Depa.tment Faculty of ScienceFayoum UniversityFayoum63514Egypt

Heteroa.om-doped meso/micro-porous ca.bon ma.eria.s a.e conventiona.ly produced by ha.sh ca.boniza.ion under a. inert a.mosphere involving specific precursors,ha.d/soft templa.es,a.d heteroa.om-conta.ning ***,we report a.fa.ile synthesis of N a.d O co-doped meso/micro-porous ca.bon(NOMC)by templa.e-free ca.boniza.ion of a.sma.l-molecule precursor in a.semi-closed *** semi-closed ca.boniza.ton process yields hydrophilic NOMCs with la.ge surfa.e a.ea.in a.high *** porous structure a. well a. the elementa. composition of NOMCs ca. be modula.ed by cha.ging the holding time a. a.pa.ticula. *** a. meta.-free heterogeneous ca.a.ysts ca. selectively oxidize benzyl a.cohol a.d its deriva.ives into a.dehydes/ketones with>85%conversion in a.ueous solution,which is much higher tha. tha. of the control sa.ple obta.ned in tube furna.e(21%conversion),ma.nly due to their high N content,high percenta.e of pyridinic N,a.d la.ge surfa.e *** presence of O-conta.ning moieties a.so helps to improve the hydrophilicity a.d dispersion a.ility of ca.a.ysts a.d thus fa.ilita.es the ma.s tra.sfer process during a.ueous *** NOMC ca.a.ysts a.so dispa.ed excellent a.tivity for a.wide ra.ge of substra.es with a.selectivity of>99%.

关键词： Semi-closed ca.boniza.ion Nitrogen a.d oxygen doping Mesoporous ca.bon Meta.-free ca.a.yst Selective a.ueous oxida.ion

a. overview of the cha.a.teristics of a.va.ced binders for high-performa.ce Li–S ba.teries

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Na.o Ma.eria.s Science 2021年第2期3卷 124-139页

作者： Jun Zha.g Mingna. Li hussein a.younus Binshen Wa.g Qunhong Weng Ya. Zha.g Shiguo Zha.g College of Ma.eria.s Science a.d Engineering Hunan UniversityChangsha410082China Chemistry Depa.tment Faculty of ScienceFayoum UniversityFayoum63514Egypt Depa.tment of Chemistry a.d Biotechnology Yokohama National University79-5 TokiwadaiHodogaya-kuYokohama240-8501Japan

The lithium-sulfur ba.tery(Li–S)is a.promising energy stora.e system with ma.y a.va.ta.es over the commercia.ized lithium-ion *** ha. a.high theoretica. ca.a.ity of 1675 ma. gà1,a.high theoretica. energy density(2600 Wh kgà1),a.d is eco-environmenta.ly *** only a.sma.l a.ount is used(a. a.fect the discha.ge ca.a.ity a.d cycling sta.ility of sulfur ca.hodes in the Li–S *** recent yea.s,tremendous efforts ha.e been ma.e to develop functiona. binders with robust a.hesive strength,fa.t ion/electron tra.sporta.ion,strong a.choring of lithium polysulfide(LiPS),a.d ra.id redox kinetics,to improve ca.a.ity,coulombic efficiency,a.d energy *** a.ticle reviews recent developments in binders for the Li–S *** briefly introducing the funda.enta.s of the Li–S ba.tery,the desirea.le cha.a.teristics of binders a.e discussed ba.ed on the correla.ion between the functions of the binder molecules a.d the performa.ce of the *** cha.lenges in developing promising binders a.d potentia. solutions a.e provided in the conclusion.

关键词： Lithium–sulfur ba.tery a.va.ced binder Polymer

Pha.e-junction a./TiO_(2)na.ocomposite a. photoca.hode for H_(2)genera.ion

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Journa. of Ma.eria.s Science & Technology 2021年第24期83卷 179-187页

作者： Hemda. S.H.Moha.ed Moha.ed Ra.ia.Xia.-Ga.g Zhou Xu-Sen Qin Goma. Kha.iri Moha.ed Sha.a. hussein a.younus S.Ta.a.Zhi-Yi Hu Jing Liu Yu Li Ba.-Lia. Su Sta.e Key La.ora.ory of a.va.ced Technology for Ma.eria.s Synthesis a.d Processing Wuhan University of TechnologyWuhan430070China Physics Depa.tment Faculty of ScienceFayoum UniversityFayoum63514Egypt Na.ophotonics a.d a.plica.ions La. Physics DepartmentFaculty of ScienceBeni-Suef UniversityBeni-Suef62514Egypt Chemistry Depa.tment Faculty of ScienceFayoum UniversityFayoum63514Egypt Na.ostructure Resea.ch Centre(NRC) Wuhan University of TechnologyWuhan430070China La.ora.ory of Inorga.ic Ma.eria.s Chemistry(CMI) University of Namur61 rue de Bruxelles5000NamurBelgium

Developing a.a.a.e/rutile pha.e-junction in Ti O_(2)to construct Z-scheme system is quite effective to improve its photoelectrochemica. *** this work,the a.a.a.e/rutile pha.e-junction a./Ti O_(2)na.ocomposites a.e developed a. photoca.hodes for hydrogen *** optimized a./Ti O_(2)na.ocomposite a.hieves a.high current density of 1.28 m a.cm-2,a. incident photon-to-current conversion efficiency(IPCE)of 10.8%,a. a.plied bia. photon-to-current efficiency(a.PE)of 0.32 a. 390 nm a.d a.cha.ge ca.riers’lifetime up to 2000 *** enha.cement on photoelectrochemica. a.tivity ca. be a.tributed to:(ⅰ)the genera.ed Z-scheme system in the a.a.a.e/rutile pha.e-junction a./Ti O_(2)photoca.hode enha.ces the sepa.a.ion,diffusion a.d tra.sforma.ion of electron/hole pa.rs inside the structure,(ⅱ)a. na.odots modifica.ion in the a.a.a.e/rutile pha.es lea.ing to the tuned ba.d ga. with enha.ced light a.sorption a.d(ⅲ)the formed Schottky ba.rier a.ter a. na.odots surfa.e modifica.ion provides enough electron tra.s to a.oid the recombina.ion of photogenera.ed electrons a.d *** results here suggest tha. developing pha.e-junction na.ocomposite a. photoca.hode will provide a.new vision for their enha.ced photoelectrochemica. genera.ion of hydrogen.

关键词： a./TiO_(2)na.ocomposites a.a.a.e/rutile pha.e-junction Z-scheme Photoca.hode H2 genera.ion

Supported ionic liquid pha.e-boosted highly a.tive a.d dura.le electroca.a.ysts towa.ds hydrogen evolution rea.tion in a.idic electrolyte

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Journa. of Energy Chemistry 2021年第3期30卷 342-351页

作者： Qiyou Wa.g Ya.g Ga. Zhongyun Ma.Ya. Zha.g Wenpeng Ni hussein a.1} Ce Zha.g Zhengjia. Chen Shiguo Zha.g College of Ma.eria.s Science a.d Engineering Hunan UniversityChangsha 410082China Depa.tment of Chemistry Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of EducationXiangtan UniversityXiangtan 411105HunanChina Qia. Xuesen La.ora.ory of Spa.e Technology China Academy of Space Technology(CAST)Beijing 100094China Zhuha. Institute of a.va.ced Technology Chinese a.a.emy of Sciences Biomaterials Research CenterZhuhai 519003GuangdongChina Chemistry Depa.tment Faculty of ScienceFayoum UniversityFayoum 63514Egypt

Pla.inum is genera.ly known a. the most effective electroca.a.yst for hydrogen evolution rea.tion beca.se it ca. grea.ly lower the overpotentia. a.d a.celera.e the rea.tion kinetics,while its commercia. potentia. a.wa.s suffers from sca.city,high cost,low utiliza.ion,a.d poor dura.ility pa.ticula.ly in a.idic *** herein demonstra.e a.fa.ile method to improve the hydrogen evolution performa.ce of Pt-ba.ed electroca.a.ysts by simply decora.ing the-sta.e-of-the-a.t a.d commercia.ly a.a.la.le Pt/C with hydrophobic protic([DBU][NTf2])or a.rotic([BMIm][NTf2])ionic *** current densities of[BMIm]@Pt/C a.d[DBU-H]@Pt/C with 10% ionic liquid a. a. overpotentia. of 40 mV a.e 2.81 a.d 4.15 times,respectively,higher tha. tha. of the pristine Pt/*** importa.tly,ionic liquid-decora.ion significa.tly improves the long-term sta.ility of Pt *** 8 h of chronoa.perometric mea.urements,[DBU-H]@Pt/C a.d[BMIm]@Pt/C ca. still reta.n 83.7% a.d 78.3% of their origina. a.tivity,respectively,which is much higher tha. tha. of the pristine Pt/C(24.4%).The improved performa.ce of Pt/C decora.ed with ionic liquid is considered to a.ise from the improved proton conductivity(pa.ticula.ly for protic ionic liquid)a.d hydrophobic microenvironment crea.ed by the supported ionic liquid *** presence of ionic liquid la.er not only de-coordina.es H+from hydronium ions nea.by the Pt na.opa.ticles,but it a.so protects Pt na.opa.ticles from dissolution in the a.idic media.

关键词： Pt/C Hydrophobic Protic Interfa.e engineering Proton conductivity