Journal article
Preparation of PdNi@NH2-GO Catalysts with Enhanced Electrocatalytic Activity and Stability for Ethanol Oxidation
International journal of hydrogen energy, v 157, 150396
12 Aug 2025
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
This study presents a novel room-temperature synthesis of PdNi bimetallic catalysts supported on amino-functionalized graphene oxide (NH2-GO) for enhanced ethanol oxidation reaction (EOR) in alkaline media. By utilizing (3-aminopropyl)-triethoxysilane (APTES) to modify graphene oxide (GO), we constructed a hydrophilic NH2-GO carrier with improved dispersibility and electron-rich active sites. PdNi alloys with tunable Pd/Ni molar ratios (5:1, 7:1, 9:1, 1:0) were anchored on NH2-GO via surfactant-free sodium borohydride reduction, enabling precise control of nanoparticle size and distribution. FT-IR, Raman and UV-vis spectroscopy confirmed successful APTES grafting, enhancing GO hydrophilicity and metal-support interaction. SEM and TEM confirmed that PdNi nanoparticles (4.4 nm average diameter) exhibited uniform dispersion on NH2-GO sheets. XRD and SAED verified the face-centered cubic (fcc) structure of PdNi alloys, with lattice expansion (0.229 nm d-spacing for Pd(111)) induced by Ni incorporation. XPS analysis revealed electron transfer from Ni to Pd, optimizing the electronic structure for EOR.Electrochemical results revealed that Pd7Ni1@NH2-GO achieved a peak mass activity of 2.72 A/mgPd, 3.1 times higher than commercial Pd/C (0.88 A/mgPd). CO stripping tests and the RDE analysis showed that the Pd7Ni1@NH2-GO catalysts possessed an excellent anti CO poisoning and had better ethanol oxidation kinetics. This work provides a scalable strategy for designing high-performance, cost-effective EOR catalysts through synergistic engineering of bimetallic composition and functionalized carbon supports.
•Amino-functionalized graphene oxide (NH2-GO) synthesized via APTES grafting enhances hydrophilicity and metal dispersion.•Surfactant-free PdNi alloys (4.4 nm) achieve tunable Pd/Ni ratios and face-centered cubic structures.•Pd7Ni1@NH2-GO delivers 2.72 A/mgPd mass activity, 3.1 times higher than commercial Pd/C.•Ni doping induces lattice expansion and electron transfer, optimizing Pd's electronic structure.•Superior CO tolerance and ethanol oxidation kinetics revealed by CO stripping and RDE tests.
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Details
- Title
- Preparation of PdNi@NH2-GO Catalysts with Enhanced Electrocatalytic Activity and Stability for Ethanol Oxidation
- Creators
- Niannian Hu - Shanghai Polytechnic UniversityJunping Tang - Shanghai Polytechnic UniversityXunwang Duan - Shanghai Polytechnic UniversityCheng Chen - Shanghai Polytechnic UniversityXinfeng Wu - Shanghai Polytechnic UniversityYonghou Xiao - Shanghai Polytechnic UniversityLexing You - Zhejiang Normal UniversityXinzhou Ma - Foshan UniversityWeiheng Shih - Drexel UniversityHuaqing Xie - Shanghai Polytechnic UniversityShigang Sun - Xiamen UniversityDonghai Lin - Shanghai Polytechnic University
- Publication Details
- International journal of hydrogen energy, v 157, 150396
- Publisher
- Elsevier
- Number of pages
- 9
- Grant note
- Program for Professor of Special Appointment (Eastern Scholar) at SIHLGaoyuan Discipline of Shanghai-Materials Science and EngineeringShanghai Polytechnic University-Drexel University Joint Research Center for Optoelectronics and SensingScience Fund for Distinguished Young Scholars of Fujian Province: 2019J06027
This work is supported by the Program for Professor of Special Appointment (Eastern Scholar) at SIHL, Gaoyuan Discipline of Shanghai-Materials Science and Engineering, and Shanghai Polytechnic University-Drexel University Joint Research Center for Optoelectronics and Sensing. This work is also supported by Science Fund for Distinguished Young Scholars of Fujian Province (2019J06027) .
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:001534341900002
- Scopus ID
- 2-s2.0-105010412247
- Other Identifier
- 991022064898804721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Physical
- Electrochemistry
- Energy & Fuels