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Lee H, Lee JS, Kwak GW, Kim J, Kim KM, Kang DG, Yun GN, Kim HT, Choi SJ, Kim SJ. Carbide-Induced Thermal Shock Synthesis of High-Entropy Alloy Nanoparticles Anchored on WO 3 Nanofibers for High-Performance Gas Sensors. ACS NANO 2025; 19:18095-18107. [PMID: 40222014 DOI: 10.1021/acsnano.4c11149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/15/2025]
Abstract
The synthesis of high-entropy alloy nanoparticles (HEA NPs) on oxide supports with a uniform and homogeneous distribution has been a significant challenge in traditional carbothermal shock (CTS) methods. In this study, we introduce a carbide-induced thermal shock (CITS) process for synthesizing HEA NPs anchored on tungsten trioxide (WO3) nanofibers. Utilizing one-dimensional (1D) tungsten carbide (WC) nanofibers (NFs) as scaffolds, we facilitated their oxidation to WO3 while preserving structural integrity. This approach resulted in the formation of ultrasmall HEA NPs (1-3 nm) strongly anchored on the WO3 NFs, preventing grain growth and enabling a core-shell microstructure. The functionalized WO3 NFs with homogeneously distributed HEA NPs demonstrated significantly enhanced gas sensing performance, especially for hydrogen sulfide (H2S), with a response (Rair/Rgas) of 22.1 at 5 ppm. This improvement is attributed to the CITS process, which enhances the chemisorption of oxygen species and increases the density of Lewis acid sites, leading to superior catalytic performance and stability. The findings from this study demonstrate the effectiveness of the CITS method in synthesizing highly active oxide-based catalysts and its potential applications in advanced gas sensing technologies under extreme conditions.
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Affiliation(s)
- Hyunji Lee
- Center for CO2 & Energy, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeong-ro, Daejeon 34114, South Korea
- Department of Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon 34114, Republic of Korea
| | - Joon-Seok Lee
- Division of Materials of Science and Engineering, Hanyang University, Seoul 04763, Republic of Korea
| | - Gyeong-Won Kwak
- Division of Materials of Science and Engineering, Hanyang University, Seoul 04763, Republic of Korea
| | - Jina Kim
- Center for CO2 & Energy, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeong-ro, Daejeon 34114, South Korea
| | - Kyung-Min Kim
- Center for CO2 & Energy, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeong-ro, Daejeon 34114, South Korea
| | - Dong Gwon Kang
- Center for CO2 & Energy, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeong-ro, Daejeon 34114, South Korea
| | - Gwang-Nam Yun
- Research Center for Nanocatalysts, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeong-ro, Daejeon 34114, South Korea
- School of Chemical Engineering, Sungkyunkwan University (SKKU), 2066, Seobu-Ro, Jangan-Gu, Suwon, Gyeong Gi-Do 16419, Republic of Korea
| | - Hyun-Tak Kim
- Center for CO2 & Energy, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeong-ro, Daejeon 34114, South Korea
| | - Seon-Jin Choi
- Division of Materials of Science and Engineering, Hanyang University, Seoul 04763, Republic of Korea
| | - Sang-Joon Kim
- Center for CO2 & Energy, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeong-ro, Daejeon 34114, South Korea
- Department of Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon 34114, Republic of Korea
- Department of Materials Science and Engineering, Chungnam National University, Daejeon 34134, Republic of Korea
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Akansu H, Arbag H, Tasdemir HM, Yasyerli S, Yasyerli N, Dogu G. Nickel-based alumina supported catalysts for dry reforming of biogas in the absence and the presence of H2S: Effect of manganese incorporation. Catal Today 2021. [DOI: 10.1016/j.cattod.2021.12.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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