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Platinum-Tellurium Alloy metallene Toward Formic Acid Oxidation Reaction

Renewables 2023年第1期1卷 90-99页

作者： Ya-Nan Li Qing-Ling Hong Bo-Qiang Miao Tian-Jiao Wang Yu Ding Yu Chen Key Laboratory of Macromolecular Science of Shaanxi Province School of Materials Science and EngineeringShaanxi Normal UniversityXi’an 710062

Engineering the composition and/or morphology of noble metal nanocrystals is a highly effective strategy for enhancing their electrocatalytic performance.Recently,metallenes with specific chemical and physical properties have increasingly attracted attention in the field of electrocatalysis.In this work,two-dimensional ultrathin platinum-tellurium alloy metallene(PtTe A-ML)is synthesized using a conventional liquid-phase chemical reduction method.The high atomic utilization as well as alloy effect endow PtTe A-ML with preeminent electrocatalytic activity for the formic acid oxidation reaction(FAOR).Specifically,the direct oxidation pathway of FAOR can be completely achieved using PtTe A-ML,which suppresses the production of toxic carbon monoxide(CO)intermediates and improves the reaction kinetics of FAOR.Accordingly,the FAOR activity of PtTe AML in acidic media is 43 and 5.6 times higher than that of commercial Pt and Pd nanocrystals,respectively.Meanwhile,PtTe A-ML also exhibits excellent electrocatalytic activity for the CO oxidation reaction because of the introduction of oxygenophilic Te atoms and electron transfer between Pt and Te,which elevates the durability of PtTe A-ML for FAOR.This study provides a simple synthesis strategy for PtTe A-ML and demonstrates that PtTe A-ML has a promising practical prospect for direct formic acid fuel cells.

关键词： metallene PtTe alloy electrocatalysis formic acid electrooxidation fuel cells

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Bifunctional PdPt bimetallenes for formate oxidation-boosted water electrolysis

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Carbon Energy 2023年第12期5卷 175-186页

作者： Xi-Lai Liu Yu-Chuan Jiang Jiang-Tao Huang Wei Zhong Bin He Pu-Jun Jin Yu Chen Key Laboratory of Macromolecular Science of Shaanxi Province Key Laboratory of Applied Surface and Colloid Chemistry(Ministry of Education)Shaanxi Key Laboratory for Advanced Energy DevicesShaanxi Engineering Lab for Advanced Energy TechnologySchool of Materials Science and EngineeringShaanxi Normal UniversityXi'anShaanxiPR China College of New Materials and New Energies Shenzhen Technology UniversityShenzhenGuangdongPR China

Small-molecule electrooxidation-boosted water electrolysis(WE)is an energy-saving method for hydrogen(H2)production.Herein,PdPt bimetallenes(PdPt BMLs)are obtained through the simple galvanic replacement reaction.PdPt BMLs reveal 2.93-fold enhancement in intrinsic electroactivity and 4.53-fold enhancement in mass electroactivity for the formate oxidation reaction(FOR)with respect to Pd metallenes(Pd MLs)at 0.50 V potential due to the synergistic effect.Meanwhile,the introduction of Pt atoms also considerably increases the electroactivity of PdPt BMLs for hydrogen evolution reaction(HER)with respect to Pd MLs in an alkaline medium,which even exceeds that with the use of commercial Pt nanocrystals.Inspired by the outstanding FOR and HER electroactivity of bifunctional PdPt BMLs,a two-electrode FOR-boosted WE system(FOR-WE)is constructed by using PdPt BMLs as the cathode and the anode.The FOR-WE system only requires an operational voltage of 0.31 V to achieve H2 production,which is 1.48 V lower than that(ca.1.79 V)with the use of the traditional WE system.

关键词： electrocatalyst formate oxidation reaction hydrogen evolution reaction metallene water electrolysis

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PdMoSb trimetallene as high-performance alcohol oxidation electrocatalyst

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Nano Research 2023年第2期16卷 2041-2048页

作者： Junfeng Liu Qiuxia Wang Tong Li Yong Wang Huaming Li Andreu Cabot Institute for Energy Research School of Chemistry and Chemical EngineeringJiangsu UniversityZhenjiang 212013China Catalonia Institute for Energy Research-IREC Sant Adriàde BesòsBarcelona 08930Spain ICREA Pg.Lluís Companys 23Barcelona 08010Spain

metallenes are an emerging class of two-dimensional(2D)material with outstanding potential in electrocatalysis.Herein,we present a new PdMoSb trimetallene produced by a facile wet-chemistry procedure and tested for the alcohol oxidation reaction.PdMoSb shows an extremely high Pd utilization and superior performance toward ethanol,methanol,and glycerol electro-oxidation compared with PdMo and commercial Pd/C catalysts.Experimental results and density functional theory calculations reveal that the enhanced activity relies not only on the high surface area that characterizes the ultrathin 2D metallene structure,but also on the particular electronic configuration of Sb.Sb facilitates OH−adsorption in the reactive-intermediate pathway and strongly enhances the CO tolerance in the poisoning-intermediate pathway for alcohol oxidation.The excellent alcohol oxidation performance of PdMoSb trimetallene demonstrates the high potential of multimetallenes in the field of electrocatalysis.

关键词： metallene ternary alloy 2D material alcohol oxidation reaction electrocatalysis

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A highly efficient atomically thin curved Pd Ir bimetallene electrocatalyst

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National Science Review 2021年第9期8卷 100-110页

作者： Fan Lv Bolong Huang Jianrui Feng Weiyu Zhang Kai Wang Na Li Jinhui Zhou Peng Zhou Wenxiu Yang Yaping Du Dong Su Shaojun Guo School of Materials Science and Engineering Peking University Department of Applied Biology and Chemical Technology Hong Kong Polytechnic University Frontier Institute of Science and Technology jointly with College of Science Xi'an Jiaotong University Center for Functional Nanomaterials Brookhaven National Laboratory School of Materials Science and Engineering & National Institute for Advanced Materials Nankai University College of Engineering Peking University

The multi-metallene with an ultrahigh surface area has great potential in precise tuning of surface heterogeneous d-electronic correlation by surface strain effect for the distinctive surface electronic structure, which is a brand new class of promising 2 D electrocatalyst for sustainable energy device application. However, achieving such an atomically thin multi-metallene still presents a great challenge.Herein, we present a new synthetic method for an atomic-level palladium-iridium(Pd Ir) bimetallene with an average thickness of only～1.0 nm for achieving superior catalysis in the hydrogen evolution reaction(HER) and the formic acid oxidation reaction(FAOR). The curved Pd Ir bimetallene presents a top-ranked high electrochemical active area of 127.5 ± 10.8 m~2 g Pd+Ir-1in the reported noble alloy materials, and exhibits a very low overpotential, ultrahigh activity and improved stability for HER and FAOR. DFT calculation reveals that the Pd Ir bimetallene herein has a unique lattice tangential strain, which can induce surface distortion while concurrently creating a variety of concave-convex featured micro-active regions formed by variously coordinated Pd sites agglomeration. Such a strong strain effect correlates the abnormal on-site active 4 d10-t2g-orbital Coulomb correlation potential and directly elevates orbital-electronegativity exposure within these active regions, resulting in a preeminent barrier-free energetic path for significant enhancement of FAOR and HER catalytic performance.

关键词： strain metallene PdIr alloy atomically thin electrocatalyst

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