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Energy & Environmental Materials 2024年第3期7卷 257-267页

作者： Kejun Xu Liuying Wang Chaoqun Ge Long Wang Bin Wang Zhuo Wang Chuanwei Zhang Gu Liu Xi'an Research Institute of High Technology Xi'an 710025China School of Material Science and Engineering Zhengzhou UniversityZhengzhou 450001China School of Mechanical Engineering Xi'an University of Science and TechnologyXi'an 710054China

NiO,an anodic electrochromic material,has applications in energy-saving windows,intelligent displays,and military ***,its electrochromic mechanism and reasons for its performance degradation in alkaline aqueous electrolytes are complex and poorly understood,making it challenging to improve NiO thin *** studied the phases and electrochemical characteristics of NiO films in different states(initial,colored,bleached and after 8000 cycles)and identified three main reasons for performance ***,Ni(OH)_(2)is generated during electrochromic cycling and deposited on the NiO film surface,gradually yielding a NiO@Ni(OH)_(2)core-shell structure,isolating the internal NiO film from the electrolyte,and preventing ion ***,the core-shell structure causes the mode of electrical conduction to change from first-to second-order conduction,reducing the efficiency of ion transfer to the surface Ni(OH)_(2)***,Ni(OH)_(2)and NiOOH,which have similar crystal structures but different b-axis lattice parameters,are formed during electrochromic cycling,and large volume changes in the unit cell reduce the structural stability of the thin ***,we clarified the mechanism of electrochromic performance degradation of NiO films in alkaline aqueous electrolytes and provide a route to activation of NiO films,which will promote the development of electrochromic technology.

关键词： alkaline electrolyte electrochromism NiO film performance attenuation mechanism

N,S-Doped Carbon Dots as Additive for Suppression of Zinc Dendrites in alkaline electrolyte

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Chinese Journal of Chemistry 2023年第14期41卷 1697-1704页

作者： Shan Cai Ge Chang Jiugang Hu Jiae Wu Yuqing Luo Guoqiang Zou Hongshuai Hou Xiaobo Ji College of Chemistry and Chemical Engineering Central South UniversityChangshaHunan410083 China

The severe dendrite growth on zinc anode in alkaline electrolyte brings great challenge to the development of zinc-based *** is a simple and effective strategy to inhibit zinc dendrite formation by introducing additives into the *** this study,N,S-doped carbon dots(TU-CQDs)were synthesized and used as additives to regulate zinc deposition in a typical KOH *** experimental and three-dimensional transient nucleation model disclosed that the special functional groups of carbon dots can change the electrode surface state and the coordination behaviors of zinc species in the ***,TU-CQDs can not only inhibit the hydrogen evolution reaction,but also achieve uniform zinc *** in-situ synchrotron radiation X-ray imaging elucidated that TU-CQDs can effectively inhibit the dendrite growth and improve the reversibility of zinc plating/stripping *** work provides a feasible route for regulating the reversibility of zinc metal anode in alkaline electrolyte.

关键词： Zinc anode Carbon dots alkaline electrolyte Dendrite-free Electrode interfacesI electrolyte additives

Promoting effects of Fe_2O_3 to Pt electrocatalysts toward methanol oxidation reaction in alkaline electrolyte

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Chinese Journal of Catalysis 2017年第3期38卷 554-563页

作者：宋桂花杨海芳孙雅飞王静怡曲卫东张强马令娟冯媛媛曲阜师范大学化学与化工学院山东省生命有机分析重点实验室山东曲阜273165

Fe_2O_3 nanorods and hexagonal nanoplates were synthesized and used as the promoters for Pt electrocatalysts toward the methanol oxidation reaction（MOR） in an alkaline *** catalysts were characterized by scanning electron microscopy,transmission electron microscopy,X-ray diffraction,X-ray photoelectron spectroscopy,cyclic voltammetry and *** results show that the presence of Fe_2O_3 in the electrocatalysts can promote the kinetic processes of MOR on Pt,and this promoting effect is related to the morphology of the Fe_2O_3 *** catalyst with Fe_2O_3 nanorods as the promoter（Pt-Fe_2O_3/C-R） exhibits much higher catalytic activity and stability than that with Fe_2O_3 nanoplates as the promoter（Pt-Fe_2O_3/C-P）.The mass activity and specific activity of Pt in a Pt-Fe_2O_3/C-R catalyst are 5.32 A/mgpt and 162.7 A/m^2_（Pt）,respectively,which are approximately 1.67 and 2.04 times those of the Pt-Fe_2O_3/C-P catalyst,and 4.19 and 6.16 times those of a commercial PtRu/C catalyst,*** effects between Fe_2O_3 and Pt and the high content of Pt oxides in the catalysts are responsible for the *** findings contribute not only to our understanding of the MOR mechanism but also to the development of advanced electrocatalysts with high catalytic properties for direct methanol fuel cells.

关键词： Platinum Ferric oxide Promoting effect Methanol electrooxidation reaction alkaline electrolyte

Co₉S₈ Nanotubes as an Efficient Catalyst for Hydrogen Evolution Reaction in alkaline electrolyte

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American Journal of Analytical Chemistry 2016年第2期7卷 210-218页

作者： Lihuang Jin Cuncai Lv Jie Wang Han Xia Yaoxing Zhao Zhipeng Huang Scientific Research Academy Jiangsu University Zhenjiang China

Cobalt sulfide (Co9S8) nanotubes were found to be an electrocatalyst for the hydrogen evolution reaction under alkaline condition. An electrode comprising of Co9S8 nanotubes on a glass carbon electrode (GCE) (mass loading: 0.855 mg·cm-2) produced a cathodic current density of 20 mA·cm-2 at an overpotential of 320 mV. The Co9S8/GCE electrode was stable over 20,000 s during potentiostatic electrolysis. Minor degradation of reduction current after 4000 cyclic voltammetric sweeps suggests the long-term viability under operating conditions. The faradaic efficiency of Co9S8 nanotubes is nearly 100% during the electrolysis of water.

关键词： Cobalt Sulfide Nanotubes Electrocatalyst Hydrogen Evolution Reaction alkaline electrolyte

Improved hydrogen oxidation reaction under alkaline conditions by Au–Pt alloy nanoparticles

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Journal of Energy Chemistry 2020年第1期29卷 52-56,I0003页

作者： Lijuan Lu Lishan Peng Li Li Jing Li Xun Huang Zidong Wei College of Chemistry and Chemical Engineering Chongqing University

This work demonstrates the outstanding performance of alloyed Au1 Pt1 nanoparticles on hydrogen oxidation reaction(HOR)in alkaline *** to the weakened hydrogen binding energy caused by uniform incorporation of Au,the alloyed Au1Pt1/C nanoparticles exhibit superior HOR activity than commercial PtRu/*** the contrary,the catalytic performance of the phase-segregated Au2Pt1/C and Au1Pt1/C bimetallic nanoparticles in HOR is significantly ***,Au1Pt1/C shows a remarkable durability with activity dropping only 4% after 3000 CV cycles,while performance attenuation of commercial PtRu/C is high up to 15% under the same *** results indicate that the alloyed Au1Pt1/C is a promising candidate to substitute commercial PtRu/C for hydrogen oxidation reaction in alkaline electrolyte.

关键词： Hydrogen oxidation reaction Pt-Au alloy Nanoparticles alkaline electrolyte

Recent advances in alkaline hydrogen oxidation reaction

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Journal of Energy Chemistry 2022年第3期31卷 107-122,I0004页

作者： Lixin Su Dan Gong Yiming Jin Dean Wu Wei Luo College of Chemistry and Molecular Sciences Wuhan UniversityWuhan 430072HubeiChina Suzhou Institute of Wuhan University Suzhou 215123JiangsuChina

The development of highly efficient electrocatalysts toward hydrogen oxidation reaction(HOR)under alkaline media is essential for the commercialization of alkaline exchange membrane fuel cells(AEMFCs).However,the HOR kinetics in alkaline is two to three orders of magnitude slower than that in *** critically,fundamental understanding of the sluggish kinetics derived from the p H effect is still *** this review,the recent development of understanding HOR mechanism and rational design of advanced HOR electrocatalysts are ***,recent advances in the theories focusing on fundamental understandings of HOR under alkaline electrolyte are comprehensively ***,from the aspect of intermediates binding energy,optimizing hydrogen binding energy(HBE)and increasing hydroxyl binding energy(OHBE),the strategies for designing efficient alkaline HOR catalysts are *** last,perspectives for the future research on alkaline HOR are pointed out.

关键词： Hydrogen oxidation reaction Hydrogen evolution reaction alkaline electrolyte AEMFC Binding energy

Effects of Hybrid Voltages on Oxide Formation on 6061 Al-alloys During Plasma Electrolytic Oxidation

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Chinese Journal of Aeronautics 2009年第5期22卷 564-568页

作者： Kai Wang Bon Heun Koo Chan Gyu Lee Young Joo Kim Sunghun Lee Eungsun Byon School of Nano & Advanced Materials Engineering Changwon National University Changwon 641-773 Korea Surface Technology Research Center Korea Institute of Materials Science Changwon 641-010 Korea

Plasma electrolytic oxidation （PEO） is carried out on 6061 Al-alloys in a weak alkaline electrolyte containing NaOH, Na2SiO3 and NaCl. Centered on the correlation of composition and structure, analyses by means of X-ray diffration （XRD）, scanning electron microscope （SEM） and energy dispersive spectrometry （EDS） are conducted on the specimens, which have been PEO-treated under hybrid voltages of different direct current （DC） values （140-280 V） with constant alternate current （AC） amplitude （200 V）. Attention is paid to the composition, properties and growth mechanism of oxide layers formed with hybrid voltages. Moreover, the main effects of DC value are discussed. Ceramic layers with a double-layer structure which combines hard outer and soft inner layers are found to be consist of α-Al2O3,γ-Al2O3 and mullite. With the DC values increasing, the growth of the ceramic layers tends to have increasingly obvious three-stage feature.

关键词： plasma electrolytic oxidation oxide layer aluminum alloys alkaline electrolyte hybrid voltages

Designing single-atom catalysts toward improved alkaline hydrogen evolution reaction

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Materials Reports(Energy) 2022年第3期2卷 38-49页

作者： Fatma Abdelghafar Xiaomin Xu Ping Jiang Zongping Shao WA School of Mines:Minerals Energy and Chemical Engineering(WASM-MECE)Curtin UniversityPerthWestern Australia6102Australia WA School of Mines:Department of Evaluation and Analysis Egyptian Petroleum Research InstituteCairoEgypt

Electrochemical water splitting powered by renewables-generated electricity represents a promising approach for green hydrogen ***,the sluggish kinetics for the hydrogen evolution reaction(HER)under an alkaline medium causes a massive amount of energy losses,hindering large-scale *** efficient and low-cost catalyst candidates for large-scale H_(2) generation becomes a crucial ***-atom catalysts(SACs)demonstrate great promise for enabling efficient alkaline HER catalysis at maximum atom utilization *** this review,we provide a comprehensive overview of the recent progress in SACs for the HER application in alkaline *** fundamentals of alkaline HER are first introduced,followed by a justification of the need to develop *** rational design of the SACs including the inherent element property,coordination environment,SAC morphology,and SAC mass loading are *** facilitate the development of SACs for alkaline HER,we further propose the remaining challenges and perspectives in this research field.

关键词： Single-atom catalyst Hydrogen evolution reaction Electrocatalysis alkaline electrolyte Water splitting

Controlled Growth of NiMoO_(4) Nano-rods on Carbon Cloth:A Novel Electrode for the Hydrogen Evolution Reaction in alkaline Media and Simulated Sea Water

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China Petroleum Processing & Petrochemical Technology 2022年第2期24卷 91-100页

作者： Jiang Bolong Shi Shunjie Cui Yanyan Jiang Nan Innovation Institute for Sustainable Maritime Architecture Research and Technology Qingdao University of TechnologyQingdao Shandong 266000 Institute of Environmental and Municipal Engineering Qingdao University of TechnologyQingdaoShandong 266000

A series of NiMoO_(4)-nano rod/carbon cloth composite electrodes with different loadings(x)of NiMoO_(4)-NRs was synthesized with a view to implementing an efficient hydrogen evolution reaction(HER).The NiMoO_(4) nano-rods(NRs)were prepared by growing them directly on carbon cloth(CC)via a simple hydrothermal reaction coupled with an annealing *** resulting NiMoO_(4)-NR/CC-x composites served directly as electrodes for electrolysis of an alkaline medium and a simulated sea *** results indicated that among the NiMoO_(4)-NR/CC-x composites,the NiMoO_(4)-NR/CC-10 composite possessed the highest HER activity with an overpotential of 244.8 mV at 10 mA/cm^(2),a Tafel slope of 95 mV/dec,the fastest charge transfer rate(R_(ct)alkaline *** in simulated seawater,the NiMoO_(4)-NR/CC-10 composite showed good *** outstanding HER activity and stability may originate from the strong interaction between Ni and Mo in the NiMoO_(4) NRs as well as the efficient charge transfer process and the rate of the HER due to the synergistic effect involving the CC and NiMoO_(4) NRs.

关键词： Hydrogen evolution reaction catalyst NiMoO_(4)nano-rods carbon cloth alkaline electrolyte simulated seawater

Electrocatalysts development for hydrogen oxidation reaction in alkaline media:From mechanism understanding to materials design

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Chinese Journal of Catalysis 2021年第12期42卷 2094-2104页

作者： Yang Qiu Xiaohong Xie Wenzhen Li Yuyan Shao Pacific Northwest National Laboratory RichlandWashington 99352USA Department of Chemical&Biological Engineering Iowa State UniversityAmesIAUSA DOE’s Ames Laboratory AmesIAUSA

Anion exchange membrane(AEM)fuel cells have gained great attention partially due to the advantage of using non-precious metal as ***,the reaction kinetics of hydrogen oxidation reaction(HOR)is two orders of magnitude slower in alkaline systems than in *** understand the slower kinetics of HOR in base,two major theories have been proposed,such as(1)pH dependent hydrogen binding energy as a major descriptor for HOR;and(2)bifunctional theory based on the contributions of both hydrogen and hydroxide adsorption for HOR in alkaline ***,we discuss the possible HOR mechanisms in alkaline electrolytes with the corresponding change in their Tafel *** from the traditional Tafel-Volmer and Heyrovsky-Volmer HOR mechanisms,the recently proposed hydroxide adsorption step is also discussed to illustrate the difference in HOR mechanisms in acid and *** further summarize the representative works of alkaline HOR catalyst design(e.g.,precious metals,alloy,intermetallic materials,Ni-based alloys,carbides,nitrides,etc.),and briefly describe their fundamental HOR reaction mechanism to emphasize the difference in elementary reaction steps in alkaline *** strategy of strengthening local interaction that facilitates both H2 desorption and Hads+OHads recombination is finally proposed for future HOR catalyst design in alkaline environment.

关键词： Hydrogen oxidation reaction alkaline electrolyte Fuel cell Electrocatalyst Electrocatalysis Hydrogen and hydroxide binding energy