Stable dry reforming of methane over Ni–Pt bimetallic catalysts supported on KIT-5 in a continuous flow system

Nanostructured bimetallic Ni–Pt catalysts supported on KIT-5 mesoporous silica were developed and assessed for their efficiency in the continuous dry reforming of methane (DRM) to generate synthesis gas. Both monometallic variants (Ni/KIT-5 and Pt/KIT-5) and a range of bimetallic Ni–Pt/KIT-5 catalysts were synthesized using co-impregnation and sequential impregnation methods. Comprehensive characterization of the catalysts was conducted through techniques such as high-resolution scanning electron microscopy (HR-SEM), X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET) surface area analysis, thermogravimetric analysis (TGA), and Fourier-transform infrared spectroscopy (FT-IR). In the monometallic Ni-based catalysts, nickel primarily existed in the form of NiO. In contrast, the bimetallic catalysts exhibited surface species such as Ni 2 O 3 and NiPt 2 O4. In the bimetallic Ni–Pt catalysts, thermally stable PtO 2 and NiPt 2 O 4 phases were identified. Reduction in hydrogen led to the development of Ni–Pt alloy phases on the surface, which enhanced the overall catalytic performance. The bimetallic Ni–Pt catalysts outperformed their monometallic counterparts in DRM activity. The nanofibrous structure of KIT-5, characterized by its interconnected pore network, provided improved accessibility to active sites and facilitated efficient diffusion of reactants and products. Among the catalysts evaluated, the 9.5%Ni–0.5%Pt/KIT-5 composition achieved the highest conversions of both methane and carbon dioxide, while maintaining a relatively low H 2 /CO product ratio. Durability assessments at 700 °C over a period of six hours demonstrated high thermal stability and negligible deactivation due to carbon deposition. Post-reaction analyses of the spent catalysts using XRD and HR-SEM revealed minimal structural deterioration. TGA measurements indicated that carbon deposition resulted in approximately 10% weight loss, suggesting the presence of mainly amorphous carbon and confirming the catalyst's excellent resistance to coking. The fibrous architecture of KIT-5 effectively suppressed nickel particle sintering and carbon build-up. These findings underscore the potential of Ni–Pt/KIT-5 systems, particularly with optimized metal loadings, as robust and coke-resistant catalysts for syngas production via dry reforming of methane.
2026 27634 27654 1 10.1039/rsc_crossmark_policy rsc.org true King Khalid University https://doi.org/10.13039/501100007446 RGP2/316/46 Princess Nourah Bint Abdulrahman University https://doi.org/10.13039/501100004242 PNURSP2026R584 http://creativecommons.org/licenses/by-nc/3.0/ 10.1039/D6RA02861F 20260522122631 https://xlink.rsc.org/?DOI=D6RA02861F http://pubs.rsc.org/en/content/articlepdf/2026/RA/D6RA02861F Int. J. Hydrogen Energy Al-Fatesh 44 2019 21546 10.1016/j.ijhydene.2019.06.085 Int. J. Hydrogen Energy Farooqi 46 2021 31024 10.1016/j.ijhydene.2021.01.049 Int. J. Hydrogen Energy Aguiar 44 2019 32003 10.1016/j.ijhydene.2019.10.118 Int. J. Hydrogen Energy Wang 38 2013 9718 10.1016/j.ijhydene.2013.05.097 ChemCatChem Wittich 12 2020 2130 10.1002/cctc.201902142 Int. J. Hydrogen Energy Sharifianjazi 47 100 2021 42213 10.1016/j.ijhydene.2021.11.172 ACS Catal. Lustemberg 6 2016 8184 10.1021/acscatal.6b02360 Int. J. Hydrogen Energy Tang 47 2022 30391 10.1016/j.ijhydene.2022.07.002 ChemCatChem Roussiere 6 2014 1447 10.1002/cctc.201300958 Catal. Sci. Technol. Mohan 10 2020 6628 10.1039/d0cy00939c J. Phys. Chem. B Wei 108 2004 7253 10.1021/jp030783l J. Catal. Wei 224 2004 370 10.1016/j.jcat.2004.02.032 Sci. Rep. Al-Fatesh 10 2020 1 10.1038/s41598-02070930-1 RSC Adv. Arora 6 2016 108668 10.1039/c6ra20450c ChemCatChem Giehr 10 2018 751 10.1002/cctc.201701376 Catal. Today Titus 270 2016 68 10.1016/j.cattod.2015.09.027 ACS Catal. Zuo 8 2018 9821 10.1021/acscatal.8b02277 Int. J. Hydrogen Energy Morales Anzures 46 2021 26224 10.1016/j.ijhydene.2021.05.073 Appl. Catal., B Zhang 176–177 2015 513 10.1016/j.apcatb.2015.04.039 Appl. Catal., B Li 202 2017 683 10.1016/j.apcatb.2016.09.071 Int. J. Hydrogen Energy da Fonseca 45 2020 5182 10.1016/j.ijhydene.2019.09.207 J. Catal. Lou 356 2017 147 10.1016/j.jcat.2017.10.009 Int. J. Hydrogen Energy Li 46 2021 31608 10.1016/j.ijhydene.2021.07.056 Int. J. Hydrogen Energy Ekeoma 2022 10.1016/j.ijhydene.2022.05.297 Ind. Eng. Chem. Res. Al-fatesh 61 1 2022 164 10.1021/acs.iecr.1c03163 Int. J. Hydrogen Energy Yang 41 2016 1513 10.1016/j.ijhydene.2015.11.044 J. Energy Inst. Taherian 97 2021 100 10.1016/j.joei.2021.04.005 Chem. Eng. J. Kweon 431 2022 133364 10.1016/j.cej.2021.133364 Microporous Mesoporous Mater. Gholizadeh 310 2021 110616 10.1016/j.micromeso.2020.110616 Int. J. Hydrogen Energy Chong 46 2021 24687 10.1016/j.ijhydene.2020.01.086 Langmuir Febriyanti 32 2016 5802 10.1021/acs.langmuir.6b00675 J. CO2 Util. Abdulrasheed 37 2020 230 10.1016/j.jcou.2019.12.018 IOP Conf. Ser.: Mater. Sci. Eng. Siang 808 2020 012006 10.1088/1757-899X/808/1/012006 Int. J. Hydrogen Energy Aramouni 45 2020 17153 10.1016/j.ijhydene.2020.04.261 Int. J. Hydrogen Energy Cichy 47 2022 16528 10.1016/j.ijhydene.2022.03.147 Nanoscale Das 10 2018 6409 10.1039/c7nr09625a Catal. Today Ocsachoque 172 2011 226 10.1016/j.cattod.2011.02.057 Catal. Today Araiza 360 2021 46 10.1016/j.cattod.2019.06.018 J. Mater. Chem. Singha 5 2017 15688 10.1039/c7ta04452f Front. Chem. Alvarez Moreno 9 2021 1 10.3389/fchem.2021.694976 Int. J. Hydrogen Energy Duan 2022 10.1016/j.ijhydene.2022.05.211 ACS Catal. Liu 9 2019 3349 10.1021/acscatal.8b05162 Int. J. Hydrogen Energy Fatah 45 2020 9522 10.1016/j.ijhydene.2020.01.144 Inorg. Chem. Xiong 65 12 2026 6802 10.1021/acs.inorgchem.6c00156 ACS Catal. Fihri 2 2012 1425 10.1021/cs300179q Catal. Today Guerrero-Caballero 333 2019 251 10.1016/j.cattod.2018.11.064 Green Chem. Gautam 18 2016 5890 10.1039/c6gc02012g Catalysts Sadek 10 2020 112 10.3390/catal10010112 Sci. Rep. Oboudatian 12 2022 1 10.1038/s41598-022-05993-3 Mater. Chem. Phys. Guan 82 2003 1002 10.1016/j.matchemphys.2003.09.003 Catal. Today Dou 311 2018 48 10.1016/j.cattod.2017.12.027 J. Solid State Electrochem. Umeshbabu 20 2016 2725 10.1007/s10008-016-3278-4 Appl. Surf. Sci. Zhang 499 2020 143933 10.1016/j.apsusc.2019.143933 Nano Res. Liu 19 2026 94908604 10.26599/NR.2026.94908604 Chem. Commun. Liu 62 2026 8733 10.1039/D6CC00135A Nat. Commun. Tian 13 2022 5567 10.1038/s41467-022-33217-9 Int. J. Hydrogen Energy Damyanova 37 2012 15966 10.1016/j.ijhydene.2012.08.056 Appl. Catal., A Boukha 317 2007 299 10.1016/j.apcata.2006.10.029 Int. J. Hydrogen Energy Abdulrasheed 45 2020 18549 10.1016/j.ijhydene.2019.04.126 J. Energy Inst. Hu 125 2026 102467 10.1016/j.joei.2026.102467 Appl. Surf. Sci. Tyuliev 32 1988 381 10.1016/0169-4332(88)90089-X ACS Omega Chang 6 2021 9692 10.1021/acsomega.1c00295 Appl. Catal., A Lim 505 2015 62 10.1016/j.apcata.2015.07.040 J. Phys. D Appl. Phys. Choudhury 22 1989 1185 10.1088/0022-3727/22/8/026 J. Electrochem. Soc. Arciga-Duran 165 2018 H3178 10.1149/2.0261804jes Appl. Surf. Sci. Kim 165 2000 70 10.1016/S0169-4332(00)00378-0 J. Energy Chem. He 112 2026 778 10.1016/j.jechem.2025.09.007 ACS Catal. Wu 9 2019 2693 10.1021/acscatal.8b02821 Int. J. Electrochem. Sci. Guo 18 1 2023 26 10.1016/j.ijoes.2023.01.005 Pet. Sci. Wang 23 2025 447 10.1016/j.petsci.2025.11.015 Int. J. Hydrogen Energy Zhang 40 2015 16115 10.1016/j.ijhydene.2015.09.150 J. Taiwan Inst. Chem. Eng. Nejat 97 2019 216 10.1016/j.jtice.2019.01.025 Ocean. Eng. Wang 341 2025 122516 10.1016/j.oceaneng.2025.122516 ChemCatChem Li 7 2015 427 10.1002/cctc.201402921 Sci. Adv. Xu 12 1 2026 eadz7504 10.1126/sciadv.adz7504 Appl. Catal., A San-Jose-Alonso 371 2009 54 10.1016/j.apcata.2009.09.026 Chem. Eng. J. Huang 537 2026 176243 10.1016/j.cej.2026.176243 Int. J. Hydrogen Energy Shen 44 2019 4616 10.1016/j.ijhydene.2019.01.027 Appl. Catal., B Quek 95 2010 374 10.1016/j.apcatb.2010.01.016 J. Nat. Gas Sci. Eng. Moradi 33 2016 657 10.1016/j.jngse.2016.06.004 Int. J. Hydrogen Energy Omoregbe 42 2017 11283 10.1016/j.ijhydene.2017.03.146 J. Phys. Chem. C Manukyan 19 28 2015 16131 10.1021/acs.jpcc.5b04313 J. Phys. Chem. C Kharatyan 123 35 2019 21513 10.1021/acs.jpcc.9b04506 Int. J. Hydrogen Energy Estephane 40 2015 9201 10.1016/j.ijhydene.2015.05.147 Electrocatalyst Fu 2018 1 10.1002/adfm.201705094.1705094 Appl. Catal., B Pinilla 200 2017 255 10.1016/j.apcatb.2016.07.015 Int. J. Hydrogen Energy Xu 35 2010 13013 10.1016/j.ijhydene.2010.04.075 Appl. Surf. Sci. Chen 484 2019 479 10.1016/j.apsusc.2019.04.093 Appl. Catal., A Nemeth 504 2015 608 10.1016/j.apcata.2015.04.006 Schweiz. Z. Hydrol. Björkman 31 1969 632 10.1007/BF02543692