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Electron-enriched Pt induced by CoSe_(2)promoted bifunctional catalytic ability for low carbon alcohol fuel electro-reforming of hydrogen evolution

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Journal of Energy Chemistry 2022年第12期75卷 46-54,I0002页

作者： Yang Zhou Qiaowei Wang Xinlong Tian jinfa chang Ligang Feng School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225002JiangsuChina State Key Laboratory of Marine Resource Utilization in South China Sea Hainan Provincial Key Lab of Fine ChemistrySchool of Chemical Engineering and TechnologyHainan UniversityHaikou 570228HainanChina NanoScience Technology Center University of Central FloridaOrlandoFL 32826USA

Alcohol fuel electro-reforming is promising for green hydrogen generation while developing efficient bifunctional catalysts for alcohol fuel electrolysis is still very ***,we for the first time proposed the electron-enriched Pt induced by CoSe_(2)has an efficient bi-functional catalytic ability for alcohol fuels electro-reforming of hydrogen in acid *** theoretical calculation revealed the advantages of electron-enriched Pt surface for the adsorption of intermediate,which is well supported by spectroscopic analysis and CO-stripping *** improved catalytic performances of activity,durability,and kinetics are demonstrated compared to the conventional alloy system and commercial Pt/C catalyst,due to the efficient synergism of Pt and CoSe_(2);the peak current density of Pt/CoSe_(2)for methanol(ethanol)oxidation is 87.61(48.27)m A cm^(-2),which is about 3.3(2.0)times higher than that of Pt/C catalyst and 2.0(1.5)times that of the traditional PtCo alloy ***,about 80%of the initial current was found after 1000 cycles of stability test for alcohol fuel oxidation of Pt/CoSe_(2)catalyst,higher than that of Pt/C(ca.50%)and PtCo catalyst(65%).When Pt/CoSe_(2)catalyst serviced as bi-functional catalysts for electrolyzer,a low cell potential of 0.65(0.78)V for methanol(ethanol)electrolysis was required to reach 10 m A cm^(-2),which was about 1030(900)m V less than that of conventional water electrolysis using Pt/C as the *** current result is instructive for the design of novel bifunctional catalyst and the understanding of hydrogen generation via alcohol fuel electro-reforming.

关键词： Cobalt selenide Electrolysis Pt nanoparticles Alcohol oxidation reaction Hydrogen evolution reaction

Strong preciousmetal–metal oxide interaction for oxygen reduction reaction:A strategy for efficient catalyst design

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SusMat 2023年第1期3卷 2-20页

作者： Wei Zhang jinfa chang Yang Yang NanoScience Technology Center University of Central FloridaOrlandoFloridaUSA Department of Materials Science and Engineering University of Central FloridaOrlandoFloridaUSA Renewable Energy and Chemical Transformation Cluster University of Central FloridaOrlandoFloridaUSA Department of Chemistry University of Central FloridaOrlandoFloridaUSA The StephenW.Hawking Center for Microgravity Research and Education University of Central FloridaOrlandoFloridaUSA

Oxygen reduction reaction(ORR)is an electrochemical reaction in which dissolved oxygen in an electrolyte is reduced toOH−/H2Owhen receiving *** reaction plays a crucial role in shaping the efficiency of both metal-air batteries and fuel cells,and precious metals are the dominant catalysts carrying out the ORR in their ***,how to manipulate the electronic structure of precious metals as active sites to further promote ORR performance and maximize the utilization rate is still under *** oxide serves as suitable and promising support that can strongly interact with precious metals for both activity and durability ***,we present recent research updates on strong precious metal-metal oxide interaction(SPMMOI)utilized in *** start by introducing the background of ORR,the issues to be solved,and its practical applications followed by a thorough discussion of the reaction mechanism and comprehensive evaluation protocols of *** then provide a complete understanding of theworking principle of SPMMOI and highlight the related ***,we summarize the merits of the precious metal-metal oxide systemand propose the research direction aswell as some urgent problems to be addressed in the future.

关键词： electrocatalysis electronic structure oxide support oxygen reduction reaction strong precious metal-metal oxide interaction

Low carbon alcohol fuel electrolysis of hydrogen generation catalyzed by a novel and effective Pt–CoTe/C bifunctional catalyst system

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Green Energy & Environment 2024年第4期9卷 758-770页

作者： Yang Zhou Lice Yu jinfa chang Ligang Feng Jiujun Zhang School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou225002JiangsuChina NanoScience Technology Center University of Central FloridaOrlandoFL32826USA College of Sciences&Institute for Sustainable Energy Shanghai UniversityShanghai200444China

Low carbon alcohol fuels electrolysis under ambient conditions is promising for green hydrogen generation instead of the traditional alcohol fuels steam reforming technique,and highly efficient bifunctional catalysts for membrane electrode fabrication are required to drive the electrolysis ***,the efficient catalytic promotion effect of a novel catalyst promoter,CoTe,on Pt is demonstrated for low carbon alcohol fuels of methanol and ethanol electrolysis for hydrogen *** and density functional theory calculation results indicate that the optimized electronic structure of Pt–CoTe/C resulting from the synergetic effect between Pt and CoTe further regulates the adsorption energies of CO and H*that enhances the catalytic ability for methanol and ethanol ***,the good water activation ability of CoTe and the strong electronic effect of Pt and CoTe increased the tolerance ability to the poisoning species as demonstrated by the CO-stripping *** high catalytic kinetics and stability,as well as the promotion effect,were also carefully ***,71.9%and 75.5%of the initial peak current density was maintained after 1000 CV cycles in acid electrolyte for methanol and ethanol oxidation;and a low overpotential of 30 and 35 mV was required to drive the hydrogen evolution reaction in methanol and ethanol solution at the current density of 10 mA cm^(-2).In the two-electrode system for alcohol fuels electrolysis,using the optimal Pt–CoTe/C catalyst as bi-functional catalysts,the cell potential of 0.66 V(0.67 V)was required to achieve 10 mA cm^(-2) for methanol(ethanol)electrolysis,much smaller than that of water electrolysis(1.76 V).The current study offers a novel platform for hydrogen generation via low carbon alcohol fuel electrolysis,and the result is helpful to the catalysis mechanism understanding of Pt assisted by the novel promoter.

关键词： Methanol electrolysis Ethanol electrolysis Cobalt telluride Pt-based electrocatalyst Hydrogen evolution reaction

Nitrogen-doped carbon black supported Pd nanoparticles as an effective catalyst for formic acid electro-oxidation reaction

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Frontiers in Energy 2017年第3期11卷 310-317页

作者： Na SUN Minglei WANG jinfa chang Junjie GE Wei XING Guangjie SHAO State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied Chemistry Laboratory of Advanced Power Sources Changchun 130022 China State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao 066004 China State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao 066004 China

Pd nanoparticles supported on nitrogen doped carbon black （Vulcan XC-72R） with two different levels of doping were prepared by the microwave-assisted ethylene glycol reduction process and used as catalyst for the formic acid electro-oxidation （FAEO）. The results indicate that the different nitrogen doping contents in Pd/N-C catalysts have a significant effect on the performance of FAEO. A higher N content facilitates the uniform dispersion of Pd nanoparticles on carbon black with narrow particle size distribution. Furthermore, the electrochemical results show that the catalyst with a higher N-doping content possesses a higher catalytic activity and a long-term stability for FAEO. The peak current density of the Pd/N-C （high） catalyst is 1.27 and 2.31 times that of the Pd/N-C （low） and homemade Pd/C-H catalyst. The present paper may provide a simple method for preparation of high-performance anode catalyst for direct formic acid fuel cells （DFAFCs）.

关键词： formic acid electro-oxidation nitrogen doped oxidized carbon nitrogen content

A review of Ni based powder catalyst for urea oxidation in assisting water splitting reaction

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Advanced Powder Materials

Advanced Powder Materials 2022年第3期1卷 70-87页

作者： Jiaxin Li Shuli Wang jinfa chang Ligang Feng School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225002China NanoScience Technology Center University of Central FloridaOrlandoFL32826USA

Water splitting has been regarded as a sustainable and environmentally-friendly technique to realize green hydrogen generation,while more energy is consumed due to the high overpotentials required for the anode oxygen evolution *** electrooxidation,an ideal substitute,is thus received increasing attention in assisting water-splitting *** that highly efficient catalysts are still required to drive urea oxidation,and the facile generation of high valence state species is significant in the reaction based on the electrochemicalchemical *** high cost and rareness make the noble metal catalysts impossible for further consideration in large-scale ***-based catalysts are very promising due to their cheap price,facile structure tuning,good compatibility,and easy active phase *** the light of the significant advances made recently,herein,we reviewed the recent advances of Ni-based powder catalysts for urea oxidation in assisting water-splitting *** fundamental of urea oxidation is firstly presented to clarify the mechanism of urea-assisted water splitting,and then the prevailing evaluation indicators are briefly expressed based on the electrochemical *** catalyst design principle including synergistic effect,electronic effect,defect construction and surface reconstruction as well as the main fabrication approaches are presented and the advances of various Ni-based powder catalysts for urea assisted water splitting are summarized and *** problems and challenges are also concluded for the Ni-based powder catalysts fabrication,the performance evaluation,and their *** the key influencing factors for catalytic process and their application,attention should be given to structure-property relationship deciphering,novel Ni-based powder catalysts development and their construction in the real device;specifically,the effort should be directed to the Ni-based powder catalyst with mul

关键词： Nickel Powder catalyst Urea Water splitting Synergistic effect Electronic effect

Advancements in Seawater Electrolysis:Progressing from Fundamental Research to Applied Electrolyzer Application

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Renewables 2023年第4期1卷 415-454页

作者： jinfa chang Yang Yang NanoScience Technology Center University of Central FloridaOrlandoFlorida 32826 Faculty of Chemistry Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of EducationNortheast Normal UniversityChangchun 130024 Department of Materials Science and Engineering University of Central FloridaOrlandoFlorida 32826 Renewable Energy and Chemical Transformation Cluster University of Central FloridaOrlandoFlorida 32826 Department of Chemistry University of Central FloridaOrlandoFlorida 32826 The Stephen W.Hawking Center for Microgravity Research and Education University of Central FloridaOrlandoFlorida 32826

Seawater electrolysis(SWE)provides a promising and efficient pathway to produce green ***,the current SWE technology confronts a lot of challenges,such as the sluggish reaction kinetics on the anode side,and a lot of impurities and ions in seawater that poison the active sites of the catalyst and block membrane *** addition,the existence of chloride ions(Cl−)in seawater will strongly compete with oxygen evolution reaction(OER)by the chlorine oxidation/evolution reaction(ClOR/ClER)on the anode side as a result of the extremely similar thermodynamic ***,to move SWE much closer to commercialization,it is highly desirable to enhance not only the activity of electrocatalysts but also the selectivity and stability of efficient OER to restrain ClOR/*** the same time,the additive of electrolytes and the unique structural design of the electrolyzer also promote the development of *** this review,the fundamental mechanisms for SWE and water electrolysis are first introduced and ***,the design principles of efficient catalysts,electrolytes,surface/interface engineering,and novelty reaction device are critically,comprehensively summarized and ***,perspectives,challenges,and opportunities to develop and boost SWE technologies are proposed.

关键词： seawater electrolysis water oxidation reaction chlorine oxidation reaction competing reaction selectivity

A multi-step induced strategy to fabricate core-shell Pt-Ni alloy as symmetric electrocatalysts for overall water splitting

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Nano Research 2022年第2期15卷 965-971页

作者： Wenjuan Xu jinfa chang Yinggang Cheng Hongqi Liu Jifan Li Yongjian Ai Zenan Hu Xinyue Zhang Yiming Wang Qionglin Liang Yang Yang Hongbin Sun Department of Chemistry Northeastern UniversityShenyang 110819China NanoScience Technology Center Department of Materials Science and EngineeringUniversity of Central FloridaOrlandoFL 32826USA Key Laboratory of Bioorganic Phosphorus Chemistry&Chemical Biology(Ministry of Education) Department of ChemistryCenter for Synthetic and Systems BiologyTsinghua UniversityBeijing 100084China

Devising an electrocatalyst with brilliant efficiency and satisfactory durability for hydrogen production is of considerable demand,especially for large-scale ***,we adopt a multi-step consequential induced strategy to construct a bifunctional electrocatalyst for the overall water *** oxide(GO)was used as a carbon matrix and in situ oxygen source,which was supported by the octahedral PtNi alloy to form the PtxNiy-GO *** calcinating in Ar atmosphere,the oxygen in GO induced the surface segregation of Ni from the PtNi octahedron to form a core-shell structure of Ptx@***,the surface-enriched Ni continuously induced the reformation of C in reduced graphene oxide(rGO)to enhance the degree of *** multi-step induction formed a nanocatalyst Pt_(x)@Ni_(y)-rGO which has very high catalytic efficiency and *** optimizing the feeding ratio of PtNi(Pt:Ni=1:2),the electrolytic overall water splitting at 10 mA·cm^(-2) can be driven by an electrolytic voltage of as low as 1.485 V,and hydrogen evolution reaction(HER)only needs an overpotential of 37 mV in 1.0 M KOH aqueous ***,the catalyst exhibited consistent existence form in both HER and oxygen evolution reaction(OER),which was verified by switching the anode and cathode of the cell in the electrolysis of *** work provides a new idea for the synthesis and evaluation of the bifunctional catalysts for water splitting.

关键词： continuous induction core-shell structured Pt@Ni graphene oxide hydrogen evolution reaction alkaline water splitting

Nanocluster PtNiP supported on graphene as an efficient electrocatalyst for methanol oxidation reaction

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Nano Research 2021年第8期14卷 2853-2860页

作者： Long Yang Guoqiang Li Rongpeng Ma Shuai Hou jinfa chang Mingbo Ruan Wenbin Cai Zhao Jin Weilin Xu Guiling Wang Junjie Ge changpeng Liu Wei Xing Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education College of Materials Science and Chemical EngineeringHarbin Engineering UniversityHarbin 150001China State Key Laboratory of Electroanalytical Chemistry Laboratory of Advanced Power SourcesChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Collaborative Innovation Center of Chemistry for Energy MaterialsDepartment of ChemistryFudan UniversityShanghai 200433China

In this study,phosphorus doped graphene supported PtNiP nanocluster electrocatalyst(PtNiP/P-graphene)was successfully prepared via a simple hypophosphite-assisted co-reduction *** improved anchoring force and increased anchoring sites of graphene support result from phosphorus doping as well as size-confined growth effect of NaH_(2)PO_(2) leads to uniform dispersion of ultrafine PtNiP *** P also promotes the removal of CO-like intermediate by adjusting Pt electronic structure combining with alloyed Ni via electronic *** a result,the as-prepared PtNiP/P-graphene catalyst with more exposed active sites and optimized electronic structure of Pt alloy shows excellent electrocatalytic performances for methanol oxidation reaction(MOR)both in activity and durability in an acidic medium.

关键词： nanocluster PtNiP/P-graphene uniformly disperse phosphorus doping methanol electrochemical oxidation

Sulfur and nitrogen dual-doped graphdiyne as a highly efficient metal-free electrocatalyst for the Zn-air battery

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Science China Materials 2024年第12期67卷 4005-4012页

作者： Mengtian Huo Jianhang Sun Wei Liu Qianyu Li jinfa chang Zihao Xing Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education Faculty of ChemistryNortheast Normal UniversityChangchun 130024China

Sulfur and nitrogen dual-doped graphdiyne(NSGD)has been found to be a promising catalyst for oxygen reduction reaction(ORR)through a combination of density functional theory(DFT)calculation and the application of oxygen evolution reaction(OER)*** DFT analysis suggests that adsorption characteristics are significantly altered by resulting nitrogen and sulfur doping,which in turn affect the ORR *** particular,the NSGD-800 catalyst exhibits an increased ORR half-wave potential of 0.754 V,with enhanced stability due to the synergy effect of N and ***,thanks to the unique acetylene-rich structure of graphdiyne to anchor metal oxides with strong d-πinteractions,the activity and stability of com-RuO2 for OER were significantly enhanced by mixing with *** zinc-air battery(ZAB)with NSGD shows a much higher peak power density(87.3 mW cm^(−2))and longer charge-discharge cycle stability compared with the ZAB with Pt/C,making it an excellent candidate air electrode for ZAB and other energy storage and conversion devices.

关键词： metal-free catalysts oxygen reduction reaction dualdoping graphdiyne zinc-air battery