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Journal of Energy Chemistry 2020年第2期29卷 15-19页

作者： Zhaoyan Luo Junjie Ge changpeng liu Wei Xing State Key Laboratory of Electroanalytical Chemistry Jilin Province Key Laboratory of Low Carbon Chemical PowerChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022JilinChina University of Science and Technology of China Hefei 230026AnhuiChina

Water electrolysis is regarded as an environmental friendly and effective technique for large-scale hydrogen(H2)production[1,2].To date,Pt-based electrocatalysts are still the most efficient HER catalysts[3].However,the prohibitive cost and scarcity of precious metal catalysts have restricted its large-scale ***,finding an earth-abundant and effective alternative electrocatalysts is crucial to the development of‘hydrogen economy'.

关键词： Electrocatalyst MoS2 Dual-metal doping Electron level matching Hydrogen evolution reaction

Highly active PtAu alloy surface towards selective formic acid electrooxidation

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Journal of Energy Chemistry 2019年第10期28卷 157-162页

作者： Liang Liang Fateev Vladimir Junjie Ge changpeng liu Wei Xing Laboratory of Advanced Power Sources Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022JilinChina University of Chinese Academy of Sciences Beijing 100039China Jilin Province Key Laboratory of Low Carbon Chemical Power Sources Changchun 130022JilinChina State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022JilinChina National Research Center“Kurchatov Institute” Kurchatov sq.1MoscowRussia

The electrochemical oxidation of formic acid has been attracting significant attention in the past few years due to the great potential prospect of direct formic acid fuel cell (DFAFC) in applications, including high theoretical open circuit potential (1.48 V), low fuel crossover, high practical power densities at low temperature, facilitating of proton transport in catalyst layers and low toxicity [1-5].

关键词： Formic acid oxidation PtAu Electrocatalysis DFAFC Nanostructure

Design strategy and comprehensive performance assessment towards Zn anode for alkaline rechargeable batteries

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Journal of Energy Chemistry 2023年第7期82卷 122-138,I0004页

作者： Di Yang Jinsheng Li changpeng liu Wei Xing Jianbing Zhu State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022JilinChina School of Applied Chemistry and Engineering University of Science and Technology of Chin1 Hefei 230026AnhuiChina

Alkaline Zn-based primary batteries have been commercialized in the past ***,their success has not been extended to secondary batteries due to the poor cycle reversibility of Zn *** some research has been conducted on alkaline Zn anodes,their performance is still far from commercial requirements.A variety of degradation mechanisms,including passivation,dendrites,morphological changes,and hydrogen precipitation,are claimed responsible for the failure of alkaline Zn metal ***’s worse,these constraints always interact with each other,which leads to a single strategy being unable to suppress all the ***,a comprehensive evaluation of the positive and negative effects of various strategies on performance is important to promote the commercialization of alkaline Zn ***,the recent progress and performance of improvement strategies for Zn anode in alkaline conditions are reviewed ***,the principles and challenges of alkaline Zn anodes are briefly ***,various design strategies for alkaline Zn anodes from the perspectives of ion and electron regulation are ***,through a comprehensive summary of various performance parameters,the advantages and disadvantages of different strategies are compared and *** the basis of this assessment,we aim to provide more insights into the anode design of high-performance alkaline rechargeable Zn batteries.

关键词： Alkaline aqueous batteries Zinc anode Regulation strategies Performance assessment

Recent advances in active sites identification and regulation of M-N/C electro-catalysts towards ORR

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Science China Chemistry 2019年第6期62卷 669-683页

作者： Jie liu Zhao Jin Xian Wang Junjie Ge changpeng liu Wei Xing State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences University of Science and Technology of China Laboratory of Advanced Power Sources Changchun Institute of Applied Chemistry Chinese Academy of Sciences Jilin Province Key Laboratory of Low Carbon Chemical Power Sources

Transition metal and nitrogen co-doped carbon(M–N/C) catalysts are recognized as the most prospective alternatives for platinum-based electro-catalysts towards oxygen reduction reaction(ORR) in polymer electrolyte fuel cells. Recently, significant progress has been achieved in the identification and regulation of active sites of this kind of catalysts. In this mini review,we summarize the techniques and strategies to identify active sites in M–N/C catalysts, the main debates on active sites types, the measurement method for active site density, the reactivity descriptors for M–N/C catalysts, and directions to the design of ORR M–N/C catalysts.

关键词： ORR electro-catalysts M–N/C active sites

Surface interaction between Pd and nitrogen derived from hyperbranched polyamide towards highly effective formic acid dehydrogenation

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Journal of Energy Chemistry 2020年第1期29卷 212-216,I0008页

作者： Yancun Yu Xian Wang changpeng liu Fateev Vladimir Junjie Ge Wei Xing Laboratory of Advanced Power Sources Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022JilinChina University of Chinese Academy of Sciences Beijing 100049China Jilin Province Key Laboratory of Low Carbon Chemical Power Sources Changchun 130022JilinChina State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022JilinChina University of Science and Technology of China(USTC) Hefei 230026AnhuiChina National Research Center Kurchatov Institute Kurchatov sq.1MoscowRussia Laboratory of Advanced Power Sources Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchaun 130022Jilin.China

Hydrogen production from formic acid decomposition(FAD)is a promising means of hydrogen energy storage and utilization in fuel *** of efficient catalysts for dehydrogenation of formic acid is a challenging *** surface chemical and electronic structure of the active catalysis components is important in formic acid decomposition at ***,the pyrdinic-nitrogen doped catalysts from hyperbranched polyamide were prepared via in situ polymerization reaction process by using activated carbon as a *** of the introduction of the polymer,the particles of the catalysts were stabilized,and the average particle diameter was only 1.64 *** mild conditions,the catalysts activities were evaluated for *** optimized Pd-N30/C catalyst exhibited high performance achieving almost full conversion,with a turnover frequency of 3481 h^-1 at 30℃.

关键词： Formic acid decomposition Hydrogen generation Hyperbranched polymer Pd catalyst

Hydrogen etching induced hierarchical meso/micro-pore structure with increased active density to boost ORR performance of Fe-N-C catalyst

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Journal of Energy Chemistry 2019年第8期28卷 17-23,I0002页

作者： Liqin Gao Meiling Xiao Zhao Jin changpeng liu Junjie Ge Wei Xing State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied Chemistry Chinese Academy of ScienceChangchun 130022 Jilin China University of Chinese Academy of Sciences Beijing 100039 China Laboratory of Advanced Power Sources Changchun Institute of Applied ChemistryChangchun 130022 Jilin China

Rational regulation on pore structure and active site density plays critical roles in enhancing the performance of Fe-N-C catalysts. As the microporous structure of the carbon substrate is generally regarded as the active site hosts, its hostility to electron/mass transfer could lead to the incomplete fulfillment of the catalytic activity. Besides, the formation of inactive metallic Fe particles during the conventional catalyst synthesis could also decrease the active site density and complicate the identification of real active site. Herein, we developed a facial hydrogen etching methodology to yield single site Fe-N-C catalysts featured with micro/mesoporous hierarchical structure. The hydrogen concentration in pyrolysis process was designated to effectively regulate the pore structure and active site density of the resulted *** optimized sample achieves excellent ORR catalytic performance with an ultralow H2O2 yield(1%)and superb stability over 10,000 cycles. Our finding provides new thoughts for the rational design of hierarchically porous carbon-based materials and highly promising non-precious metal ORR catalysts.

关键词： Hierarchical meso/micro-pore structure Hydrogen etching Single site Fe-N-C catalysts Carbon-nitrogen-coordinated iron(FeN4) Oxygen reduction reaction

Formic acid electro-oxidation:Mechanism and electrocatalysts design

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Nano Research 2023年第3期16卷 3607-3621页

作者： Tongtong Yang Shuai Hou Jiaojiao Xing changpeng liu Junjie Ge Wei Xing State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China University of Chinese Academy of Sciences Beijing 100039China

As a model reaction for the electrooxidation of many small organic molecules,formic acid electrooxidation(FAEO)has aroused wide *** promises of direct formic acid fuel cells(DFAFC)in application further strengthen people’s attention to the related ***,despite decades of study,the FAEO mechanism is still under debate due to the multi-electron and multi-pathway nature of the catalytic *** this review,the progresses towards understanding the FAEO mechanism along with the developed methodology(electrochemistry,in-situ spectroscopy,and theoretical calculation and simulation)are *** especially focused on the construction of anti-poisoning catalysts system based on understanding of the catalytic mechanism,with anti-poisoning catalyst design being systemically ***,we provide a brief summarization for current challenges and future prospects towards FAEO study.

关键词： formic acid electrooxidation mechanism anti-poisoning methodology in-situ technique electrocatalysts design

Low-temperature synthesis of nitrogen doped carbon nanotubes as promising catalyst support for methanol oxidation

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Journal of Energy Chemistry 2019年第1期28卷 118-122页

作者： Liang Liang Meiling Xiao Jianbing Zhu Junjie Ge changpeng liu Wei Xing Laboratory of Advanced Power Sources Changchun Institute of Applied Chemistry Chinese Academy of Sciences University of Chinese Academy of Sciences Jilin Province Key Laboratory of Low Carbon Chemical Power Sources StateState Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences

The electrochemical methanol oxidation reaction(MOR) is of paramount importance for direct methanol fuel cell(DMFC) application, where efficient catalysts are required to facilitate the complicated multiple charge transfer process. The catalyst support not only determines the dispersion status of the catalysts particles, but also exerts great influence on the electronic structure of the catalysts, thereby altering its intrinsic activity. Herein, we demonstrated that nitrogen atoms, assisted by the pre-treatment of carbon matrix with oxidants, can be easily doped into carbon nanotubes at low temperature. The obtained nitrogen-doped carbon nanotubes can effectively improve the dispersion of the supported platinum nanoparticles and facilitate the MOR by modifying the electronic structure of platinum atoms,through catalyst-support interaction.

关键词： Methanol oxidation Carbon nanotubes Hydrothermal method Nitrogen doping

Identification of active sites and synergistic effect in multicomponent carbon-based Ru catalysts during electrocatalytic hydrogen evolution

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Nano Research 2023年第1期16卷 166-173页

作者： Rongpeng Ma Xian Wang Xiaolong Yang Yang Li changpeng liu Junjie Ge Wei Xing State Key Laboratory of Electroanalytical Chemistry Laboratory of Advanced Power SourcesChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026China Dalian National Laboratory for Clean Energy Chinese Academy of SciencesDalian 116023China

Single atom catalysts(SACs)were reported to demonstrate exciting catalytic features for a number of reactions,including hydrogen evolution reaction(HER).However,the true role of these single atom sites in catalysts remains elusive,particularly for those prepared via pyrolysis,where the formation of active nanoparticle counterparts is often *** we report a Ru based catalyst(Ru embedded in N doped carbon spheres(Ru/NPCS))comprising of both Ru nanoclusters and Ru single sites,who demonstrates activity exceeding Pt catalyst and mass activity among the best of the Ru based catalysts under acidic *** integration of proton exchange membrane water electrolysis with Ru/NPCS as a cathode exhibited an excellent hydrogen generation activity and extraordinary stability(during 120 h of electrolysis)with a 1/48 Ru loading(16.5μgRu·cm^(−2))of a commercial 20%Pt/C *** precisely tailoring the dispersion status of the catalysts,we reveal that while ruthenium nanoclusters actively catalyze HER via Volmer–Tafel mechanism,the Ru SACs barely catalyze HER,with H*adsorption difficult to ***,no synergy between Ru SACs and Ru cluster is revealed,meaning the Ru SACs act as a spectator rather than active species during H2 evolution.

关键词： hydrogen evolution reaction single atom catalysts nanoclusters no synergy

Anode Catalytic Dependency Behavior on Ionomer Content in Direct CO Polymer Electrolyte Membrane Fuel Cell

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Chemical Research in Chinese Universities 2022年第5期38卷 1251-1257页

作者： LI Yang WANG Xian liu Jie JIN Zhao liu changpeng GE Junjie XING Wei State Key Laboratory of Electroanalytic Chemistry Jilin Province Key Laboratory of Low Carbon Chemistry PowerChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022P.R.China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026P.R.China

In this work,the effect of Nafion ionomer content on the structure and catalytic performance of direct CO polymer electrolyte membrane fuel cell(CO-PEMFC)by using Rh-N-C single-atom catalyst as the anode catalyst layers was *** ionic plaque and roughness of the anode catalyst layers increase with the increase of Nafion ionomer ***,the contact angle measurement results show that the hydrophilicity of the anode catalyst layers also increases with the increase of Nafion ionomer ***,when the Nafion ionomer content is too low,the binding between microporous layers,catalyst layers and membrane cannot meet the requirement for either electric conductivity or mass *** Nafion ionomer content increased above 30%,the content of water in anode is difficult to ***,it was found that AN 30(30%Nafion ionomer content of anode)is the best level to effectively extend the three-phase boundary and improve CO-PEMFCs performance.

关键词： Anode catalyst Carbon monoxide Polymer electrolyte membrane fuel cell(PEMFC) Nafion ionomer content