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Metal-seed assistant photodeposition of platinum over Ta_(3)N_(5) photocatalyst for promoted solar hydrogen production under visible light

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Journal of Energy Chemistry 2021年第4期30卷 444-448页

作者： Juhong lian Deng li Yu Qi Nengcong Yang Rui zhang Tengfeng Xie naijia guan landong li fuxiang zhang School of Materials Science and Engineering National Institute for Advanced MaterialsNankai UniversityTianjin 300350China State Key Laboratory of Catalysis iChEMDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian National Laboratory for Clean EnergyDalian 116023LiaoningChina College of Chemistry Jilin UniversityChangchun 130012JilinChina

Cocatalysts play a vital role in accelerating the reaction kinetics and improving the charge separation of photocatalysts for solar hydrogen *** promotion of the photocatalytic activity largely relies on the loading approach of the ***,we introduce a metal-seed assistant photodeposition approach to load the hydrogen evolution cocatalyst of platinum onto the surface of Ta_(3)N_(5) photocatalyst,which exhibits about 3.6 times of higher photocatalytic proton reduction activity with respect to the corresponding impregnation or photodeposition *** on our characterizations,the increscent contact area of the cocatalyst/semiconductor interface with metal-seed assistant photodeposition method is proposed to be responsible for the promoted charge separation as well as enhanced photocatalytic H2 evolution *** is interesting to note that this innovative deposition strategy can be easily extended to loading of platinum cocatalyst with other noble or non-noble metal seeds for promoted activities,demonstrating its good *** work may provide an alternative way of depositing cocatalyst for better photocatalytic performances.

关键词： Tantalum nitride Cocatalyst Charge separation Contact interface Metal-seed assistant photodeposition Solar hydrogen production

Reversed configuration of photocatalyst to exhibit improved properties of basic processes compared to conventional one

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Science China Chemistry 2020年第6期63卷 771-776页

作者： Juhong lian Yu Qi Yunfeng Bao Zixi Yin Yang zhang Nengcong Yang naijia guan Shengye Jin landong li fuxiang zhang State Key Laboratory of Catalysis iChEMDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian National Laboratory for Clean EnergyDalian 116023China School of Materials Science and Engineering National Institute for Advanced MaterialsNankai UniversityTianjin 300350China State Key Laboratory of Molecular Reaction Dynamics and Collaborative Innovation Center of Chemistry for Energy Materials(iChEM) Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China

Performances of semiconductor photocatalysts are integrally determined by efficiencies of basic processes such as light absorption,charge separation and surface catalysis,but conventional configurations of photocatalysts normally suffers from the competition of light absorption originating from cocatalyst deposition and limited interface charge separation between the photocatalyst and *** we give the first proof-of-concept illustration that a reversed configuration of photocatalysts with a core/shell structure of microsized Mo2N cocatalysts and nanosized CdS photocatalysts,which exhibits superior solar hydrogen production to the conventional configuration with nanosized Mo2N cocatalysts deposited on the surface of CdS *** is revealed that the reversed configuration outperforms the conventional one in all areas of light absorption,charge separation and surface ***,the special core/shell structure introduced here can well avoid the competition of light absorption by cocatalysts and make an effective confinement effect to promote the surface catalysis of *** finding provides an alternative strategy to improve performances of photocatalysts.

关键词： photocatalyst nitride semiconductor renewable hydrogen core/shell

Unexpectedly selective hydrogenation of phenylacetylene to styrene on titania supported platinum photocatalyst under 385 nm monochromatic light irradiation

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Chinese Journal of Catalysis 2020年第4期41卷 598-603页

作者： Juhong lian Yuchao Chai Yu Qi Xiangyang Guo naijia guan landong li fuxiang zhang School of Materials Science and Engineering National Institute for Advanced MaterialsNankai UniversityTianjin 300350China State Key Laboratory of Catalysis iChEMDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian National Laboratory for Clean EnergyDalian 116023LiaoningChina

Conversion of alkynes to alkenes by photocatalysis has inspired extensive interest but it is still challenging to obtain both high conversion and *** we first demonstrate the photocatalytic conversion of phenylacetylene(PLE)to styrene(STE)with both high conversion and selectivity by using the titania(TiO2)supported platinum(Pt)as photocatalyst under 385 nm monochromatic light *** is demonstrated that the conversion rate of PLE is strongly dependent on the content of Pt cocatalyst loaded on the surface of *** on our optimization,the conversion of PLE and the selectivity towards STE on the 1 wt%Pt/TiO2 photocatalyst can unexpectedly reach as high as 92.4%and 91.3%,*** highly selective photocatalytic hydrogenation can well be extended to the conversion of other typical alkynes to alkenes,demonstrating the generality of selective hydrogenation of C≡C over the Pt/TiO2 photocatalyst.

关键词： Phenylacetylene Titania Selective Hydrogenation Photocatalysis Cocatalyst

Ni-Al_2O_3催化剂上丙烷选择性还原NO

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催化学报 2005年第10期26卷 929-932页

作者：张淑娟李兰冬章福祥薛斌关乃佳南开大学化学学院新催化材料研究所天津300071

以机械混合法、浸渍法和共沉淀法分别制备了4%Ni-Al2O3催化剂,并用X射线衍射、程序升温还原、紫外-可见漫反射光谱和N2吸附等方法对催化剂的体相和表面结构进行了表征,系统考察了制备方法及焙烧温度对Ni-Al2O3催化剂催化丙烷选择性还原N... 详细信息

以机械混合法、浸渍法和共沉淀法分别制备了4%Ni-Al2O3催化剂,并用X射线衍射、程序升温还原、紫外-可见漫反射光谱和N2吸附等方法对催化剂的体相和表面结构进行了表征,系统考察了制备方法及焙烧温度对Ni-Al2O3催化剂催化丙烷选择性还原NO性能的影响.结果表明,Ni-Al2O3中存在NiO和NiAl2O4两种镍相,前者是丙烷氧化活性中心,后者是NO选择性催化还原的活性中心.共沉淀法制备的催化剂活性最好,550℃焙烧的Ni-Al2O3催化剂在反应温度为450和500℃时NO转化率接近100%.

关键词：镍氧化铝一氧化氮选择性催化还原丙烷

金属-ZSM-5/堇青石整体式催化剂上稀燃汽车尾气的净化

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催化学报 2006年第1期27卷 41-44页

作者：李兰冬章福祥关乃佳冯洪庆刘德新南开大学新催化材料研究所天津300071 天津大学内燃机燃烧学国家重点实验室天津300072

在原位合成的ZSM5/堇青石整体式样品基础上制备了几种金属(Cu,In或Ag)改性的ZSM5/堇青石催化剂,并将其应用于稀燃发动机尾气的净化.结果表明,CuZSM5/堇青石催化性能最好,尾气中的三种主要污染物NOx,CO和HC可以同时得到净化.用微量(0.02%... 详细信息

在原位合成的ZSM5/堇青石整体式样品基础上制备了几种金属(Cu,In或Ag)改性的ZSM5/堇青石催化剂,并将其应用于稀燃发动机尾气的净化.结果表明,CuZSM5/堇青石催化性能最好,尾气中的三种主要污染物NOx,CO和HC可以同时得到净化.用微量(0.02%)贵金属(Pd,Rh或Ir)对CuZSM5/堇青石进一步改性,所得催化剂对CO的净化能力大大增强,保持高NOx转化率的温度窗口也大大加宽,因而该催化剂在稀燃汽车尾气净化方面具有潜在的应用前景.微量贵金属对CuZSM5/堇青石催化剂的改性作用也在文中进行了讨论.

关键词：铜 ZSM-5 堇青石稀燃汽车尾气贵金属