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An amorphous FeMoO_(4) nanorod array enabled high-efficiency oxygen evolution electrocatalysis in alkaline seawater

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Nano Research 2024年第4期17卷 2270-2275页

作者： Jie Tang shengjun sun Xun He Hui Zhang Chaoxin Yang Min Zhang Meng Yue Hefeng Wang Yuntong sun Yonglan Luo sulaiman Alfaifi Asmaa Farouk mohamed s.hamdy Xuping sun Huiqing Wang Binwu Ying Department of Laboratory Medicine West China HospitalSichuan UniversityChengdu 610041China College of Chemistry Chemical Engineering and Materials ScienceShandong Normal UniversityJinan 250014China Institute of Fundamental and Frontier sciences University of Electronic Science and Technology of ChinaChengdu 610054China Chemistry Department Faculty of ScienceKing Abdulaziz UniversityJeddah 21589Saudi Arabia Department of Chemistry College of ScienceKing Khalid UniversityAbha 61413Saudi Arabia Medical simulation Centre West China Second University HospitalSichuan UniversityChengdu 610041China

The development of highly efficient and durable oxygen evolution reaction(OER)catalysts for seawater electrolysis is of great importance for ***,an amorphous FeMoO_(4) nanorod array on Ni foam is reported as a highly active OER electrocatalyst in alkaline seawater,requiring only overpotentials of 303 and 332 mV to achieve 100 and 300 mA·cm^(-2),***,it shows strong long-term electrochemical durability for at least 50 h.

关键词： amorphous material FeMoO_(4) nanorod array electrocatalyst seawater electrolysis oxygen evolution reaction

FeP nanorod array:A high-efficiency catalyst for electroreduction of NO to NH3 under ambient conditions

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Nano Research 2022年第5期15卷 4008-4013页

作者： Jie Liang Qiang Zhou Ting Mou Hongyu Chen Luchao Yue Yongsong Luo Qian Liu mohamed s.hamdy Abdulmohsen Ali Alshehri Feng Gong Xuping sun Institute of Fundamental and Frontier sciences University of Electronic Science and Technology of ChinaChengdu 610054China Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education School of Energy and EnvironmentSoutheast UniversityNanjing 211189China Institute for Advanced study Chengdu UniversityChengdu 610106China Catalysis Research Group(CRG) Department of ChemistryCollege of ScienceKing Khalid UniversityP.O.Box 900461413 AbhaSaudi Arabia Chemistry Department Faculty of ScienceKing Abdulaziz UniversityP.O.Box 80203Jeddah 21589Saudi Arabia

sustainable mitigation of the continuously rising concentration of NO contaminants is among the most urgent issues of this *** electrocatalytic conversion of NO into useful NH_(3)offers an attractive path toward achieving sustainable NO abatement and NH_(3)production ***,its efficiency is challenged by the intense competition from hydrogen evolution reaction and relatively high energy barriers of NO *** is thus highly desirable to explore active electrocatalyst for NO reduction reaction and investigate the mechanisms on relevant ***,we introduce an FeP nanorod array on carbon cloth as a high-efficiency catalyst for NO electroreduction to *** 0.2 M phosphate-buffered solution,this catalyst exhibits a low onset potential of-0.014 ***,it achieves a remarkable Faradaic efficiency of 88.49%and a large NH_(3)yield of 85.62μmol·h^(-1)cm^(-2),with durability for stable NO conversion over 12 h of *** catalytic mechanism on FeP is investigated further by theoretical calculations.

关键词： FeP nanoarray NO reduction reaction NH_(3)synthesis electrocatalysis density functional theory

A significant improvement in adsorption behavior of mesoporous TUD-1 silica through neodymium incorporation

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Journal of Rare Earths 2021年第4期39卷 469-476页

作者： Badria M.Al-shehri sahar K.mohamed shaykha Alzahly mohamed s.hamdy Catalysis Research Group(CRG) Department of ChemistryCollage of ScienceKing Khalid UniversityP.O.Box 2009Abha61413Saudi Arabia Chemistry Department Collage of ScienceUmm Al-Qura UniversityMakkah21421Saudi Arabia Chemistry Department Faculty of ScienceHelwan UniversityAin HelwanCairo11795Egypt King Abdullah Institute for Nanotechnology King Saud UniversityRiyadh11451Saudi Arabia

Neodymium was incorporated into the three-dimensional mesoporous siliceous material *** order to understand the chemical and morphological structure of the prepared material,several characterization techniques were *** characterization results show the formation of highly distributed isolated Nd3+ions incorporated in the silica matrix in tetrahedrally coordinated structure,moreover no aggregation of separate phase(s)was/were *** prepared material was investigated as an adsorbent for methyl green(MG)dye in aqueous solution as a model cationic *** results show higher adsorption capacity for Nd-TUD-1 by almost 24 times higher than the neat parent TUD-1 material and more than 100 times higher than bulky Nd_(2)O_(3)under neutral *** adsorption results were fitted perfectly with pseudo-second-order ***,the adsorption isotherms were perfectly fitted with Freundlich isotherm model which indicates the formation of a multilayer of the dye molecules onto the Nd-TUD-1 surface as a physisorption with endothermic nature.

关键词： Adsorption Neodymium TUD-1 Mesoporous silica Water treatment Kinetics

selective photo-reduction of nitrate to nitrogen with a two-step process by a KBH_(4)/Cu(II)modified CuFe_(2)O_(4)photocatalyst

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Nano Research 2023年第7期16卷 10462-10475页

作者： Li Cai Jinrui Guo Ting Liu Jing Tian Zhaoli Wang Yong Liu mohamed shamdy Xuping sun College of Chemistry and Materials science Sichuan Normal UniversityChengdu 610066China Chengdu Academy of Environmental sciences Chengdu 610072China Key Laboratory of Treatment for special Wastewater of sichuan Province Higher Education system Chengdu 610066China Catalysis Research Group(CRG) Department of ChemistryCollege of ScienceKing Khalid UniversityP.O.Box 9004Abha 61413Saudi Arabia Institute of Fundamental and Frontier sciences University of Electronic Science and Technology of ChinaChengdu 610054China

Nitrate(NO_(3)^(-))removal by photochemical-reduction has received extensive ***,the low selectivity of NO_(3)^(-)reduction to N_(2)hinders the application of this *** this study,a novel Cu@Fe-Cu-CuFe_(2)O_(4)-x photocatalyst was prepared by modifying CuFe_(2)O_(4)with KBH4 and Cu(II),and used to selectively reduce NO_(3)^(-)to N_(2)with a two-step reduction *** step(1),with Cu@Fe-Cu-CuFe_(2)O_(4)-x/ultraviolet(UV)system,91.0%NO_(3)^(-)was reduced to 52.3%NO_(2)-and 39.4%N_(2)within 60 *** rapid removal of NO_(3)^(-)was due to the synergistic effect of oxygen vacancies,Fe-Cu corrosion cell,and CuFe_(2)O_(4)*** step(2),H_(2)C_(2)O_(4)and H_(2)O_(2)were introduced into the effluent of step(1)to promote CO_(2)·-formation via Fe(II)and Fe(III)catalysis and UV radiation,which boosted the selective reduction of NO_(2)-to N_(2).When H_(2)C_(2)O_(4)and H_(2)O_(2)dosages were both 4.0 mmol·L^(-1)and the reaction time was 30 min,the removal efficiency of NO_(2)-achieved 100%and the selectivity of N_(2)was 83.0%.Overall,the two-step reduction process achieved 95.0%NO_(3)^(-)removal efficiency and 90.1%N_(2)selectivity with initial NO_(3)^(-)concentration of 30 mg·N·L^(-1).In addition,the denitrification mechanism of the two-step reduction process was tentatively proposed.

关键词： nitrate nitrite photochemical-reduction denitrification photocatalysis

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电催化合成氨的研究进展

Chinese Journal of Catalysis 2023年第7期50卷 6-44页

作者：欧阳玲梁杰罗永嵩郑冬冬孙圣钧刘倩 mohamed s.hamdy 孙旭平应斌武四川大学华西医院检验科四川成都610041 电子科技大学基础与前沿研究院四川成都610054 山东师范大学化学化工与材料科学学院山东济南250014 成都大学高等研究院四川成都610106 哈立德国王大学理学院化学系阿卜哈沙特阿拉伯

氨是一种重要的工业原料,在化肥、染料、药品和炸药的制造中起着重要作用.由于氨的氢容量大、能量密度高且易于运输,被认为是一种潜在的无碳燃料.Haber-Bosch工艺实现了高附加值氨的大规模工业化生产,但其生产条件(400‒550ºC,15‒30 MPa... 详细信息

氨是一种重要的工业原料,在化肥、染料、药品和炸药的制造中起着重要作用.由于氨的氢容量大、能量密度高且易于运输,被认为是一种潜在的无碳燃料.Haber-Bosch工艺实现了高附加值氨的大规模工业化生产,但其生产条件(400‒550ºC,15‒30 MPa)苛刻,且伴随着高能耗和CO_(2)排放.因此,开发绿色和可持续的氨合成方法,同时实现全球环境的可持续性势在必行.电催化氮还原合成氨(NRR)是近年来的研究热点,该技术可以在环境条件下进行,且可利用电子作为绿色还原剂,水作为质子源.此外,该过程具有实现分散和现场按需生产氨的巨大潜力,支持分布式肥料生产,从而降低运输成本.除了N2作为氮源,对环境有害且活性高于N2的氮物种(如NO,NO_(2)^(−)/NO_(3)^(−))已被认为是实现环境条件下生产氨的有吸引力的氮源,电催化NO还原(NORR)和NO_(2)−/NO_(3)^(−)(NO_(x)^(−))还原(NtrRR)合成氨具有应用潜力.本文综述了近年来电催化合成氨的研究进展.首先简要介绍了三种电催化合成氨路线(NRR,NORR和NtrRR)的研究背景和意义.然后,对环境条件下合成氨电催化剂的最新研究进展进行了详细讨论,主要涉及催化机理、理论计算和电化学性能.最后,对人工电催化合成氨当前面临的挑战和未来的研究需求作了总结和展望,包括:(1)注重理论计算,通过理论计算可以预测可能的活性位点、吸附能和反应途径,有助于快速筛选合适的催化剂,大大降低实验成本;(2)发展先进的原位表征技术来观察电催化剂表面上的动态变化和捕获/识别反应中间体,促进对真实反应机理的探索,从而进一步指导催化剂的设计;(3)确保数据的准确性和可重复性;(4)合理设计有效的电催化剂.为了进一步提高现有材料体系对氨合成的催化性能,需要开发更高效的材料设计策略(如精确调节单原子金属的配位环境、掺杂原子/空位的类型和浓度、合理暴露特定的晶体面等),以促进电催化剂的内在活性.此外,通过优化电催化剂的形态,构建特殊的结构(如尖刺),可以暴露丰富的活性位点,显著提高其表观活性;(5)研究特定的电极材料时,除材料工程外,扩展实验条件也至关重要,包括电解质的pH值、应用电位和氮物种初始浓度等,可能会影响催化活性和选择性;(6)文献报道的稳定性测试通常在50 h以下,对于工业运行(预计在高电流密度下可以稳定运行数千小时)来说,时间太短.因此,未来的催化剂设计需要以更长的测试时间为目标;(7)未来研究应进一步探索真实环境下NORR/NtrRR的催化活性,以实现更高效的氨合成;(8)应开发一种可替代的氨分离技术.在传统的Haber-Bosch工艺中,通过冷凝,氨从未反应的N2和H_(2)中分离出来,耗能大,因此应采用比冷凝工艺能量输入更少的分离技术;(9)从实际应用角度出发,还应考虑综合的技术经济评估,包括材料成本、总能源成本、设备维护成本和产品分离成本等,以评估氨电合成的大规模可扩展性和商业可行性.综上,开展电催化合成氨领域的研究有望以绿色和可持续的方式缓解环境污染和未来的能源问题.

关键词：氨合成氮还原一氧化氮还原硝酸盐/亚硝酸盐还原电催化剂

Enhanced N_(2)-to-NH_(3)conversion efficiency on Cu3P nanoribbon electrocatalyst

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Nano Research 2022年第8期15卷 7134-7138页

作者： Qian Liu Yiting Lin shuang Gu Ziqiang Cheng Lisi Xie shengjun sun Longcheng Zhang Yongsong Luo Abdulmohsen Ali Alshehri mohamed shamdy Qingquan Kong Jiahong Wang Xuping sun Institute for Advanced study Chengdu UniversityChengdu 610106China Institute of Fundamental and Frontier sciences University of Electronic Science and Technology of ChinaChengdu 610054China shenzhen Engineering Center for the Fabrication of Two-Dimensional Atomic Crystals Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China Chemistry Department Faculty of Science&Center of Excellence for Advanced Materials ResearchKing Abdulaziz UniversityP.O.Box 80203Jeddah 21589Saudi Arabia Catalysis Research Group(CRG) Department of ChemistryCollege of ScienceKing Khalid UniversityP.O.Box 9004Abha 61413Saudi Arabia

Ambient electroreduction of nitrogen(N_(2))is considered as a green and feasible approach for ammonia(NH_(3))synthesis,which urgently demands for efficient *** has close relationship with catalytic activity of heterogeneous *** is attractive nanostructure,which possesses the flexibility of one-dimensional nanomaterials,the large surface area of two-dimensional nanomaterials,and lateral size confinement *** this work,Cu_(3)P nanoribbon is proposed as a highly efficient electrocatalyst for N_(2)-to-NH_(3)conversion under benign *** measured in N_(2)-saturated 0.1 M HCl,such Cu_(3)P nanoribbon achieves high performance with an excellent Faradaic efficiency as high as 37.8%and a large yield of 18.9μg·h^(−1)·mgcat.−1 at−0.2 *** also demonstrates outstanding stability in long-term electrolysis test at least for 45 h.

关键词： Cu_(3)P nanoribbon nitrogen reduction reaction ammonia electrosynthesis electrocatalysis

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自支撑过渡金属海水电解析氧催化剂研究进展

物理化学学报 2023年第12期39卷 63-78页

作者：吴倩高庆平单彬王文政齐玉萍台夕市王霞郑冬冬严虹应斌武罗永嵩孙圣钧刘倩 mohamed s.hamdy 孙旭平潍坊学院化学化工与环境工程学院山东潍坊261061 潍坊职业学院化学工程学院山东潍坊262737 电子科技大学基础与前沿研究院成都610054 山东师范大学化学化工与材料科学学院济南250014 成都大学高等研究院成都610106 哈立德国王大学理学院化学系催化研究课题组阿卜哈61413

海水电解是一种很有前景的可持续绿氢生产技术。然而,由于受到缓慢的动力学、阳极上竞争性的氯释放反应、氯离子腐蚀和电极表面中毒等的影响,致使阳极材料的性能和耐久性下降,析氧反应(OER)的选择性降低。与传统的粉末催化剂相比,自支... 详细信息

海水电解是一种很有前景的可持续绿氢生产技术。然而,由于受到缓慢的动力学、阳极上竞争性的氯释放反应、氯离子腐蚀和电极表面中毒等的影响,致使阳极材料的性能和耐久性下降,析氧反应(OER)的选择性降低。与传统的粉末催化剂相比,自支撑纳米阵列材料具有较低的界面电阻、较大的活性表面和优异的稳定性,已成为先进的催化剂。特别是在需要高电流密度的实际大规模制氢应用中,自支撑催化剂比粉末催化剂更具优势。电解过程中,在电极表面所产生气泡的强烈冲击下,粉末状纳米材料很容易剥离,导致催化活性降低,甚至频繁更换催化剂。相比之下,自支撑纳米材料的活性物质和基底之间具有很强的粘附性,确保了良好的电子导电性和高机械稳定性,有利于长期和循环使用。本文综述了用于海水电解自支撑过渡金属催化剂的最新进展,包括(氧)氢氧化物、氮化物、磷化物、硫族化物等。为确保OER过程中的高活性和高选择性,着重总结了各析氧催化剂在应对耐腐蚀性和屏蔽竞争反应方面所采取的策略。通常,构建具有高孔隙率和粗糙度的3D多孔纳米结构可以使催化剂具有较大的表面积和丰富的活性位点,是提高传质、OER活性和催化效率的有效策略。其次,催化剂表面的Cl−阻挡层,特别是兼具催化活性和保护作用的保护层,可以有效抑制Cl−的竞争性氧化和腐蚀,提高催化剂的催化活性、选择性和稳定性。此外,设计具有超亲水和超疏水表面的催化材料,以增加电解质的渗透性,促进活性位点的有效利用,并避免大量气泡的积累。最后,简要总结了OER催化剂在海水电解中的发展前景及建议。具体来说,海水电解的介质应从模拟盐水转移到天然海水中。鉴于天然海水电解中面临的诸多挑战,除了设计和合成具有高活性、高选择性和高稳定性的自支撑催化剂外,开发简单、低成本的天然海水预处理技术以最大限度地减少腐蚀和中毒问题也是海水电解未来发展的重要课题。更重要的是,应合理构建自支撑OER电催化剂的标准化评价体系。评估过程中应充分考虑催化剂内在活性、可达活性位点密度、尺寸、质量负荷、基质效应和试验条件等因素。

关键词：海水电解自支撑阵列过渡金属催化剂抗腐蚀析氧反应

自支撑过渡金属海水电解析氧催化剂研究进展（英文）

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物理化学学报 2023年第12期 71-86页

作者：吴倩高庆平单彬王文政齐玉萍台夕市王霞郑冬冬严虹应斌武罗永嵩孙圣钧刘倩 mohamed s.hamdy 孙旭平潍坊学院化学化工与环境工程学院潍坊职业学院化学工程学院电子科技大学基础与前沿研究院山东师范大学化学化工与材料科学学院成都大学高等研究院哈立德国王大学理学院化学系催化研究课题组

海水电解是一种很有前景的可持续绿氢生产技术。然而，由于受到缓慢的动力学、阳极上竞争性的氯释放反应、氯离子腐蚀和电极表面中毒等的影响，致使阳极材料的性能和耐久性下降，析氧反应(OER)的选择性降低。与传统的粉末催化剂相比，... 详细信息

海水电解是一种很有前景的可持续绿氢生产技术。然而，由于受到缓慢的动力学、阳极上竞争性的氯释放反应、氯离子腐蚀和电极表面中毒等的影响，致使阳极材料的性能和耐久性下降，析氧反应(OER)的选择性降低。与传统的粉末催化剂相比，自支撑纳米阵列材料具有较低的界面电阻、较大的活性表面和优异的稳定性，已成为先进的催化剂。特别是在需要高电流密度的实际大规模制氢应用中，自支撑催化剂比粉末催化剂更具优势。电解过程中，在电极表面所产生气泡的强烈冲击下，粉末状纳米材料很容易剥离，导致催化活性降低，甚至频繁更换催化剂。相比之下，自支撑纳米材料的活性物质和基底之间具有很强的粘附性，确保了良好的电子导电性和高机械稳定性，有利于长期和循环使用。本文综述了用于海水电解自支撑过渡金属催化剂的最新进展，包括(氧)氢氧化物、氮化物、磷化物、硫族化物等。为确保OER过程中的高活性和高选择性，着重总结了各析氧催化剂在应对耐腐蚀性和屏蔽竞争反应方面所采取的策略。通常，构建具有高孔隙率和粗糙度的3D多孔纳米结构可以使催化剂具有较大的表面积和丰富的活性位点，是提高传质、OER活性和催化效率的有效策略。其次，催化剂表面的Cl-阻挡层，特别是兼具催化活性和保护作用的保护层，可以有效抑制Cl-的竞争性氧化和腐蚀，提高催化剂的催化活性、选择性和稳定性。此外，设计具有超亲水和超疏水表面的催化材料，以增加电解质的渗透性，促进活性位点的有效利用，并避免大量气泡的积累。最后，简要总结了OER催化剂在海水电解中的发展前景及建议。具体来说，海水电解的介质应从模拟盐水转移到天然海水中。鉴于天然海水电解中面临的诸多挑战，除了设计和合成具有高活性、高选择性和高稳定性的自支撑催化剂外，开发简单、低成本的天然海水预处理技术以最大限度地减少腐蚀和中毒问题也是海水电解未来发展的重要课题。更重要的是，应合理构建自支撑OER电催化剂的标准化评价体系。评估过程中应充分考虑催化剂内在活性、可达活性位点密度、尺寸、质量负荷、基质效应和试验条件等因素。

关键词：海水电解自支撑阵列过渡金属催化剂抗腐蚀析氧反应

Advances in clinical applications of bioceramics in the new regenerative medicine era

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World Journal of Clinical Cases 2024年第11期12卷 1863-1869页

作者： Noha Elshazly Fayza Eid Nasr Ayat hamdy safa saied mohamed Elshazly Tissue Engineering Laboratory Faculty of DentistryAlexandria UniversityAlexandria 21526Egypt Department of Biochemistry Faculty of ScienceAlexandria UniversityAlexandria 21526Egypt Public Dental Clinic Central Administration of DentistryMinistry of Health and PopulationAlexandria 21554Egypt Department of surgery Faculty of Veterinary MedicineAlexandria 21526Egypt

In this editorial,we comment on the hard and soft tissue applications of different ceramic-based scaffolds prepared by different mechanisms such as 3D printing,sol-gel,and *** new concept of regenerative medicine relies on biomaterials that can trigger in situ tissue regeneration and stem cell recruitment at the defect site.A large percentage of these biomaterials is ceramic-based as they provide the essential requirements of biomaterial principles such as tailored multisize porosity,antibacterial properties,and angiogenic *** these previously mentioned properties put bioceramics on top of the hierarchy of biomaterials utilized to stimulate tissue regeneration in soft and hard tissue *** clinical applications registered the use of these materials in triggering soft tissue regeneration in healthy and diabetic patients such as bioactive glass *** results were promising and opened new frontiers for utilizing these materials on a larger *** same results were mentioned when using different forms and formulas of bioceramics in hard defect *** bioceramics were used in combination with other polymers and biological scaffolds to improve their regenerative and mechanical *** this progress will enable a larger scale of patients to receive such services with ease and decrease the financial burden on the government.

关键词： Regenerative medicine Bioceramics Chronic wounds Bone defects Clinical applications