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06-12-2023 | Original Article

MOF-derived Cu embedded into N-doped mesoporous carbon as a robust support of PdAu nanocatalysts for ethanol electrooxidation

Authors: Yu-Fu Huang, Peng Wu, Jun-Ping Tang, Jian Yang, Jing Li, Shuai Chen, Xue-Ling Zhao, Cheng Chen, Bin-Wei Zhang, Yan-Yun Ma, Wei-Heng Shi, Dong-Hai Lin, Shi-Gang Sun

Published in: Rare Metals | Issue 3/2024

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Abstract

Metal–organic frameworks (MOFs) have attracted widespread attention due to their large surface area and porous structure. Rationally designing the nanostructures of MOFs to promote their application in ethanol electrooxidation is still a challenge. Here, a novel Cu-NCNs (Cu-nitrogen-doped carbon nanotubes) support was synthesized by pyrolysis of melamine (MEL) and Cu-ZIF-8 together, and then, Pd–Au nanoalloys were loaded by sodium borohydride reduction method to prepare PdAu@Cu-NCNs catalysts. The generating mesoporous carbon with high specific surface area and favorable electron and mass transport can be used as a potential excellent carrier for PdAu nanoparticles. In addition, the balance of catalyst composition and surface structure was tuned by controlling the content of Pd and Au. Thus, the best-performed Pd₂Au₂@Cu-NCN-1000–2 (where 1000 means the carrier calcination temperature, and 2 means the calcination constant temperature time) catalyst exhibits better long-term stability and electrochemical activity for ethanol oxidation in alkaline media (4.80 A·mg⁻¹), which is 5.05 times higher than that of commercial Pd/C (0.95 A· mg⁻¹). Therefore, this work is beneficial to further promoting the application of MOFs in direct ethanol fuel cells (DEFCs) and can be used as inspiration for the design of more efficient catalyst support structures.

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[1]

Zheng S, Li Q, Xue H, Pang H, Xu Q. A highly alkaline-stable metal oxide@metal-organic framework composite for high-performance electrochemical energy storage. Natl Sci Rev. 2020;7(2):305. https://doi.org/10.1093/nsr/nwz137.CrossRefPubMed

[2]

Wei ZX, Zhu YT, Liu JY, Zhang ZC, Hu WP, Xu H, Feng YZ, Ma JM. Recent advance in single-atom catalysis. Rare Met. 2021;40(4):767. https://doi.org/10.1007/s12598-020-01592-1.CrossRef

[3]

Xiao D, Jiang Q, Xu C, Yang C, Yang L, He H, Huang H. Interfacial engineering of worm-shaped palladium nanocrystals anchored on polyelectrolyte-modified MXene nanosheets for highly efficient methanol oxidation. J Colloid Interface Sci. 2022;616:781. https://doi.org/10.1016/j.jcis.2022.02.111.ADSCrossRefPubMed

[4]

Li Y-R, Li M-X, Li S-N, Liu Y-J, Chen J, Wang Y. A review of energy and environment electrocatalysis based on high-index faceted nanocrystals. Rare Met. 2021;40(12):3406. https://doi.org/10.1007/s12598-021-01747-8.CrossRef

[5]

Jing XH, Guo RH, An SL, Zhang JY, Zhou GZ, Li HQ. Theoretical study on DFT of ethanol adsorption on Pt low-index surfaces. Chin J Rare Met. 2022;46(2):206. https://doi.org/10.13373/j.cnki.cjrm.xy19120008.

[6]

Su N, Hu X, Zhang J, Huang H, Cheng J, Yu J, Ge C. Plasma-induced synthesis of Pt nanoparticles supported on TiO₂ nanotubes for enhanced methanol electro-oxidation. Appl Surf Sci. 2017;399:403. https://doi.org/10.1016/j.apsusc.2016.12.095.ADSCrossRef

[7]

Lu Y, Chen W. One-pot synthesis of heterostructured Pt–Ru nanocrystals for catalytic formic acid oxidation. Chem Commun. 2011;47(9):2541. https://doi.org/10.1039/C0CC04047A.CrossRef

[8]

Chen YZ, Zhou M, Huang YF, Ma YY, Yan LY, Zhou XW, Ma XZ, Zhao XL, Chen C, Bai J, Lin DH. Enhanced ethanol oxidation over Pd nanoparticles supported porous graphene-doped MXene using polystyrene particles as sacrificial templates. Rare Met. 2022;41(9):3170. https://doi.org/10.1007/s12598-022-02039-5.CrossRef

[9]

Wang ML, Zhao J, Wang JJ, Zhang JM, Tian YZ, Yue ZZ, Li D, Hu TJ, Jia JF, Wu HS. MoO₃/C-supported Pd nanoparticles as an efficient bifunctional electrocatalyst for ethanol oxidation and oxygen reduction reactions. Rare Met. 2023;42(5):1516. https://doi.org/10.1007/s12598-022-02211-x.CrossRef

[10]

Tang JX, Tian N, Xiao LP, Chen QS, Wang Q, Zhou ZY, Sun SG. Helical PdPtAu nanowires bounded with high-index facets selectively switch the pathway of ethanol electrooxidation. J Mater Chem A. 2022;10(20):10902. https://doi.org/10.1039/D2TA01011A.CrossRef

[11]

Wei W, Chen W. “Naked” Pd nanoparticles supported on carbon nanodots as efficient anode catalysts for methanol oxidation in alkaline fuel cells. J Power Sour. 2012;204:85. https://doi.org/10.1016/j.jpowsour.2012.01.032.CrossRef

[12]

Wei Y, Wang X, Yu W, Gao Q, Chong XY, Hu CY. Theory designs and experiment studies of Pt-based solid solution ultrahigh temperature alloy. Chin J Rare Met. 2022;46(9):1163. https://doi.org/10.13373/j.cnki.cjrm.XY21070025.

[13]

Chen YZ, Ma YY, Zhou YQ, Huang YF, Li SM, Chen Y, Wang RR, Tang JP, Wu P, Zhao XL, Chen C, Zhu ZG, Chen S, Cheng K, Lin DH. Enhanced methanol oxidation on PtNi nanoparticles supported on silane-modified reduced graphene oxide. Int J Hydrogen Energy. 2022;47(10):6638. https://doi.org/10.1016/j.ijhydene.2021.12.028.CrossRef

[14]

Fang Z, Zhang Z, Ligani Fereja S, Guo J, Tong X, Zheng Y, Liu R, Liang X, Zhang L, Li Z, Chen W. Highly dispersed 1 nm PtPd bimetallic clusters for formic acid electrooxidation through a CO-free mechanism. J Energy Chem. 2023;78:554. https://doi.org/10.1016/j.jechem.2022.12.018.CrossRef

[15]

Yu LH, Tao X, Feng SR, Liu JT, Zhang LL, Zhao GZ, Zhu G. Recent development of three-dimension printed graphene oxide and MXene-based energy storage devices. Tungsten. 2022. https://doi.org/10.1007/s42864-022-00181-2.

[16]

Huang Y-H, Yang SP, Lee PT, Kuo TT, Ho CE. Significant improvement of the thermal stability and electrochemical corrosion resistance of the Au/Pd surface finish through catalytic modification. Corros Sci. 2019;146:112. https://doi.org/10.1016/j.corsci.2018.10.030.CrossRef

[17]

Nodehi Z, Rafati AA, Ghaffarinejad A. Palladium-silver polyaniline composite as an efficient catalyst for ethanol oxidation. Appl Catal A. 2018;554:24. https://doi.org/10.1016/j.apcata.2018.01.018.CrossRef

[18]

Farsadrooh M, Noroozifar M, Modarresi-Alam AR. An easy and eco-friendly method to fabricate three-dimensional Pd-M (Cu, Ni) nanonetwork structure decorated on the graphene nanosheet with boosted ethanol electrooxidation activity in alkaline medium. Int J Hydrogen Energy. 2019;44(54):28821. https://doi.org/10.1016/j.ijhydene.2019.09.048.CrossRef

[19]

Huang R, Wen YH, Zhu ZZ, Sun SG. Atomic-scale insights into structural and thermodynamic stability of Pd–Ni bimetallic nanoparticles. Phys Chem Chem Phys. 2016;18(14):9847. https://doi.org/10.1039/C5CP07555F.CrossRefPubMed

[20]

Yang B, Zhang W, Hu S, Liu C, Wang X, Fan Y, Jiang Z, Yang J, Chen W. Bidirectional controlling synthesis of branched PdCu nanoalloys for efficient and robust formic acid oxidation electrocatalysis. J Colloid Interface Sci. 2021;600:503. https://doi.org/10.1016/j.jcis.2021.05.018.ADSCrossRefPubMed

[21]

Fan F, Chen D-H, Yang L, Qi J, Fan Y, Wang Y, Chen W. PtCuFe alloy nanochains: Synthesis and composition-performance relationship in methanol oxidation and hydrogen evolution reactions. J Colloid Interface Sci. 2022;628:153. https://doi.org/10.1016/j.jcis.2022.08.032.CrossRefPubMed

[22]

Huang H, Wei Y, Yang Y, Yan M, He H, Jiang Q, Yang X, Zhu J. Controllable synthesis of grain boundary-enriched Pt nanoworms decorated on graphitic carbon nanosheets for ultrahigh methanol oxidation catalytic activity. J Energy Chem. 2021;57:601. https://doi.org/10.1016/j.jechem.2020.08.063.CrossRef

[23]

Guo XJ, Zhang Q, Li YN, Chen Y, Yang L, He HY, Xu XT, Huang HJ. Nanosized Rh grown on single-walled carbon nanohorns for efficient methanol oxidation reaction. Rare Met. 2022;41(6):2108. https://doi.org/10.1007/s12598-021-01882-2.CrossRef

[24]

Oh HS, Kim K, Ko YJ, Kim H. Effect of chemical oxidation of CNFs on the electrochemical carbon corrosion in polymer electrolyte membrane fuel cells. Int J Hydrogen Energy. 2010;35(2):701. https://doi.org/10.1016/j.ijhydene.2009.10.105.CrossRef

[25]

Li L, Hu L, Li J, Wei Z. Enhanced stability of Pt nanoparticle electrocatalysts for fuel cells. Nano Res. 2015;8(2):418. https://doi.org/10.1007/s12274-014-0695-5.CrossRef

[26]

Su CJ, Li Z, Mao MQ, Ye WH, Ye WH, Zhong JP, Ren QM, Cheng HR, Huang HM, Fu ML, Wu JL, Hu Y, Ye DQ, Xu HH. Unraveling specific role of carbon matrix over Pd/quasi-Ce-MOF facilitating toluene enhanced degradation. J Rare Earth. 2022;40(11):1751. https://doi.org/10.1016/j.jre.2021.09.017.

[27]

Ling LL, Liu WJ, Chen SQ, Hu X, Jiang H. MOF templated nitrogen doped carbon stabilized Pt–Co bimetallic nanoparticles: low Pt content and robust activity toward electrocatalytic oxygen reduction reaction. ACS Applied Nano Materials. 2018;1(7):3331. https://doi.org/10.1021/acsanm.8b00533.CrossRef

[28]

Palaniselvam T, Biswal BP, Banerjee R, Kurungot S. Zeolitic imidazolate framework (ZIF)-derived, hollow-core, nitrogen-doped carbon nanostructures for oxygen-reduction reactions in PEFCs. Chemistry. 2013;19(28):9335. https://doi.org/10.1002/chem.201300145.CrossRefPubMed

[29]

Huang Y, Wu P, Ma Y, Tang J, Zhou X, Ma X, Li W, Zhao X, Chen C, Shih W, Lin D. Single atom iron carbons supported Pd–Ni–P nanoalloy as a multifunctional electrocatalyst for alcohol oxidation. Int J Hydrogen Energy. 2023;48(37):13972. https://doi.org/10.1016/j.ijhydene.2022.12.274.CrossRef

[30]

Yuan N, Deng YR, Wang SH, Gao L, Yang JL, Zou NC, Liu BX, Zhang JQ, Liu RP, Zhang L. Towards superior lithium–sulfur batteries with metal–organic frameworks and their derivatives. Tungsten. 2022;4(4):269. https://doi.org/10.1007/s42864-022-00186-x

[31]

Zhao SN, Song XZ, Song SY, Zhang HJ. Highly efficient heterogeneous catalytic materials derived from metal-organic framework supports/precursors. Coord Chem Rev. 2017;337:80. https://doi.org/10.1016/j.ccr.2017.02.010.ADSCrossRef

[32]

Liang Q, Chen Z, Chen X, Li Y. A KCl-assisted pyrolysis strategy to fabricate nitrogen-doped carbon nanotube hollow polyhedra for efficient bifunctional oxygen electrocatalysts. J Mater Chem A. 2019;7(35):20310. https://doi.org/10.1039/C9TA07481C.CrossRef

[33]

Huang H, Wang Q, Wei Q, Huang Y. Nitrogen doped mesoporous carbon derived from copolymer and supporting cobalt oxide for oxygen reduction reaction in alkaline media. Int J Hydrogen Energy. 2015;40:6072. https://doi.org/10.1016/j.ijhydene.2015.02.089.CrossRef

[34]

Chen Y, Yang J, Ma Y, Tang J, Zhao X, Chen C, Wang L, Zhang B, Zhou X, Sun S, Lin D. N-doped carbon-stabilized PdNiCu nanoparticles derived from PdNi@Cu-ZIF-8 as highly active and durable electrocatalyst for boosting ethanol oxidation. Appl Surf Sci. 2023;637: 157944. https://doi.org/10.1016/j.apsusc.2023.157944.CrossRef

[35]

Zhang S, Pei A, Li G, Zhu L, Li G, Wu F, Lin S, Chen W, Chen BH, Luque R. Pd/CuO–Ni(OH)₂/C as a highly efficient and stable catalyst for the electrocatalytic oxidation of ethanol. Green Chem. 2022;24(6):2438. https://doi.org/10.1039/D1GC04799J.CrossRef

[36]

Chu M, Huang J, Gong J, Qu Y, Chen G, Yang H, Wang X, Zhong Q, Deng C, Cao M, Chen J, Yuan X, Zhang Q. Synergistic combination of Pd nanosheets and porous Bi(OH)₃ boosts activity and durability for ethanol oxidation reaction. Nano Res. 2022;15(5):3920. https://doi.org/10.1007/s12274-021-4049-9.ADSCrossRef

[37]

Li Z, Chen Y, Ji S, Tang Y, Chen W, Li A, Zhao J, Xiong Y, Wu Y, Gong Y, Yao T, Liu W, Zheng L, Dong J, Wang Y, Zhuang Z, Xing W, He CT, Peng C, Cheong WC, Li Q, Zhang M, Chen Z, Fu N, Gao X, Zhu W, Wan J, Zhang J, Gu L, Wei S, Hu P, Luo J, Li J, Chen C, Peng Q, Duan X, Huang Y, Chen XM, Wang D, Li Y. Iridium single-atom catalyst on nitrogen-doped carbon for formic acid oxidation synthesized using a general host-guest strategy. Nat Chem. 2020;12(8):764. https://doi.org/10.1038/s41557-020-0473-9.CrossRefPubMed

[38]

Zhang J, Feng A, Bai J, Tan Z, Shao W, Yang Y, Hong W, Xiao Z. One-pot synthesis of hierarchical flower-like Pd-Cu alloy support on graphene towards ethanol oxidation. Nanoscale Res Lett. 2017;12(1):521. https://doi.org/10.1186/s11671-017-2290-7.ADSCrossRefPubMedPubMedCentral

[39]

Zhang H, Hwang S, Wang M, Feng Z, Karakalos S, Luo L, Qiao Z, Xie X, Wang C, Su D, Shao Y, Wu G. Single atomic iron catalysts for oxygen reduction in acidic media: particle size control and thermal activation. J Am Chem Soc. 2017;139(40):14143. https://doi.org/10.1021/jacs.7b06514.CrossRefPubMed

[40]

Yu H, Fisher A, Cheng D, Cao D. Cu, N-codoped hierarchical porous carbons as electrocatalysts for oxygen reduction reaction. ACS Appl Mater Interfaces. 2016;8(33):21431. https://doi.org/10.1021/acsami.6b04189.CrossRefPubMed

[41]

Zhang J, Wang R, Hu X, Sun Z, Wang X, Guo Y, Yang L, Lou M, Wen P. MOF-derived Co embedded into N-doped nanotube decorated mesoporous carbon as a robust support of Pt catalyst for methanol electrooxidation. Appl Surf Sci. 2020;533: 147319. https://doi.org/10.1016/j.apsusc.2020.147319.CrossRef

[42]

Yun Q, Xu J, Wei T, Ruan Q, Zhu X, Kan C. Synthesis of Pd nanorod arrays on Au nanoframes for excellent ethanol electrooxidation. Nanoscale. 2022;14(3):736. https://doi.org/10.1039/D1NR05987D.CrossRefPubMed

[43]

Liang Y, Ma T, Xiong Y, Qiu L, Yu H, Liang F. Highly efficient blackberry-like trimetallic PdAuCu nanoparticles with optimized Pd content for ethanol electrooxidation. Nanoscale. 2021;13(22):9960. https://doi.org/10.1039/D1NR00841B.CrossRefPubMed

[44]

Zhou LL, Wei S, Wang WW, Jin Z, Jia CJ. Au/La-CeOx catalyst for CO oxidation: Effect of different atmospheres pretreatment on gold state — Commemorating the 100th anniversary of the birth of Academician Guangxian Xu. J Rare Earth. 2021;39(4):364. https://doi.org/10.1016/j.jre.2021.01.008.

[45]

Zhou Y, Ma R, Candelaria SL, Wang J, Liu Q, Uchaker E, Li P, Chen Y, Cao G. Phosphorus/sulfur co-doped porous carbon with enhanced specific capacitance for supercapacitor and improved catalytic activity for oxygen reduction reaction. J Power Sources. 2016;314:27414. https://doi.org/10.1016/j.jpowsour.2016.03.009.CrossRef

[46]

Zhang X, Lin D, Chen W. Nitrogen-doped porous carbon prepared from a liquid carbon precursor for CO₂ adsorption. RSC Adv. 2015;5(56):45136. https://doi.org/10.1039/C5RA08014B.ADSCrossRef

[47]

Zhou Y, Ma R, Candelaria SL, Wang J, Liu Q, Uchaker E, Li P, Chen Y, Cao G. Phosphorus/sulfur Co-doped porous carbon with enhanced specific capacitance for supercapacitor and improved catalytic activity for oxygen reduction reaction. J Power Sour. 2016;314:39. https://doi.org/10.1016/j.jpowsour.2016.03.009.CrossRef

[48]

Lin DH, Jiang YX, Wang Y, Sun SG. Silver nanoparticles confined in SBA-15 mesoporous silica and the application as a sensor for detecting hydrogen peroxide. J Nanomater. 2008;2008:1. https://doi.org/10.1155/2008/473791.CrossRef

[49]

Lin DH, Jiang YX, Chen SR, Chen SP, Sun SG. Preparation of Pt nanoparticles supported on ordered mesoporous carbon FDU-15 for electrocatalytic oxidation of CO and methanol. Electrochim Acta. 2012;67:127. https://doi.org/10.1016/j.electacta.2012.02.007.CrossRef

[50]

Feng T, Zhang M. A mixed-ion strategy to construct CNT-decorated Co/N-doped hollow carbon for enhanced oxygen reduction. Chem Commun (Camb). 2018;54(82):11570. https://doi.org/10.1039/C8CC05959D.CrossRefPubMed

[51]

Zhang Y, Yi Q, Deng Z, Zhou X, Nie H. Excellent electroactivity of ternary Pd–Ag–Sn nanocatalysts for ethanol oxidation. Catal Lett. 2018;148(4):1190. https://doi.org/10.1007/s10562-018-2335-2.CrossRef

[52]

Clímaco FR, Almeida CVS, Aristides SS, Eguiluz KIB, Salazar-Banda GR. Influence of the composition and morphology of PdNiFe/C nanocatalysts toward ethanol oxidation. Chem Phys Lett. 2022;801:139745. https://doi.org/10.1016/j.cplett.2022.139745.CrossRef

[53]

Dementjev AP, de Graaf A, van de Sanden MCM, Maslakov KI, Naumkin AV, Serov AA. X-Ray photoelectron spectroscopy reference data for identification of the C₃N₄ phase in carbon–nitrogen films. Diam Relat Mater. 2000;9(11):1904. https://doi.org/10.1016/S0925-9635(00)00345-9.ADSCrossRef

[54]

Le SD, Nishimura S. Effect of support on the formation of CuPd alloy nanoparticles for the hydrogenation of succinic acid. Appl Catal B. 2021;282:119619. https://doi.org/10.1016/j.apcatb.2020.119619.CrossRef

[55]

Subramanian NP, Li X, Nallathambi V, Kumaraguru SP, Colon-Mercado H, Wu G, Lee JW, Popov BN. Nitrogen-modified carbon-based catalysts for oxygen reduction reaction in polymer electrolyte membrane fuel cells. J Power Sources. 2009;188(1):38. https://doi.org/10.1016/j.jpowsour.2008.11.087.CrossRef

[56]

Ren G, Lu X, Li Y, Zhu Y, Dai L, Jiang L. Porous core-shell Fe₃C embedded n-doped carbon nanofibers as an effective electrocatalysts for oxygen reduction reaction. ACS Appl Mater Interfaces. 2016;8(6):4118. https://doi.org/10.1021/acsami.5b11786.CrossRefPubMed

[57]

Almeida CVS, Eguiluz KIB, Salazar-Banda GR. Superior ethanol electrooxidation activity of Pd supported on Ni(OH)₂/C. The effect of Ni(OH)₂ nanosheets content. J Electroanal Chem. 2020;878:114683. https://doi.org/10.1016/j.jelechem.2020.114683.CrossRef

Title: MOF-derived Cu embedded into N-doped mesoporous carbon as a robust support of PdAu nanocatalysts for ethanol electrooxidation
Authors: Yu-Fu Huang
Peng Wu
Jun-Ping Tang
Jian Yang
Jing Li
Shuai Chen
Xue-Ling Zhao
Cheng Chen
Bin-Wei Zhang
Yan-Yun Ma
Wei-Heng Shi
Dong-Hai Lin
Shi-Gang Sun
Publication date: 06-12-2023
Publisher: Nonferrous Metals Society of China
Published in: Rare Metals / Issue 3/2024
Print ISSN: 1001-0521
Electronic ISSN: 1867-7185
DOI: https://doi.org/10.1007/s12598-023-02512-9

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