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Thermoplasmonics originating from the relaxation process of plasmon resonances in nanostructures can be utilized as an efficient and highly localized heat source in solar-hydrogen conversion, but there have been few researches on the interfacial heat transport properties of photoelectrode with the thermoplasmonics effect in a photoelectrochemical water splitting system. In this work, the effects of temperature, interfacial coupling strength and the addition of graphene layers on the interfacial thermal conductance of Au-TiO2 electrodes are investigated by the non-equilibrium molecular dynamics simulation, and the variation of interfacial thermal conductance is analyzed by the phonon density of states. The results show that the interfacial thermal conductivity is increased by 78.55% when the temperature increases from 300 to 800 K. This is related to the fact that more low-frequency phonons participate in the interface heat transport, allowing more heat to be transferred to TiO2 to promote the interface reaction. As the coupling strength of the Au-TiO2 interface increases, the interfacial thermal conductivity of the electrode increases and then tends to stabilize. The interfacial thermal conductivity can be optimized by increasing the degree of overlap of the phonon state densities of Au and TiO2. The addition of a single layer of graphene can increase the interfacial thermal conductivity to 98.072 MW⋅m–2⋅K–1, but the addition of 2 and 3 layers of graphene can hinder interfacial heat transfer in Au and TiO2 due to the interaction between the layers of graphene. When adding graphene layer, medium-frequency phonons and high-frequency phonons are stimulated to participate in the interfacial heat transfer, but with the increase of the graphene layers, the number of low-frequency phonons in a range of 0—30 THz decreases, and these low-frequency phonons make the greatest contribution to the interfacial thermal conductivity. The obtained results are useful in regulating the thermal transport properties of the photoelectrode interface, which can provide new insights into and theoretical basis for the design and construction of composite photoelectrodes.
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Keywords:
- Au-TiO2 /
- interfacial thermal conductivity /
- phonon density of states /
- molecular dynamics
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表 1 Matsui-Akaogi力场的Buckingham势函数参数[28]
Table 1. Parameters of the Buckingham potential function for the Matsui-Akaogi force field[28].
Aij/(kcal·mol–1) Bij/(kcal·mol–1·Å6) ρij/Å Ti—Ti 717650 121.10 0.155 Ti—O 391050 290.42 0.195 O—O 271720 696.95 0.235 表 2 L-J势函数参数
Table 2. L-J potential function parameter.
σ/Å ε0/(kcal·mol–1) Ti—Au 2.488 1.62018 O—Au 3.092 0.81932 Ti—C 2.930 0.24029 Au—C 3.455 0.64085 O—C 3.529 0.12158 -
[1] Cavigli L, Milanesi A, Khlebtsov B N, Centi S, Ratto F, Khlebtsov N G, Pini R 2020 J. Colloid Interface Sci. 578 358
Google Scholar
[2] Czelej K, Colmenares J C, Jabłczyńska K, Ćwieka K, Werner L, Gradoń L 2021 Catal. Today 380 156
Google Scholar
[3] Nie J L, Schneider J, Sieland F, Zhou L, Xia S W, Bahnemann D W 2018 RSC Adv. 8 25881
Google Scholar
[4] Kunthakudee N, Puangpetch T, Ramakul P, Serivalsatit K, Hunsom M 2022 Int. J. Hydrogen Energy 47 23570
Google Scholar
[5] Zhao Y, Sang L X, Wang C 2023 Sol. Energy Mater. Sol. Cells 255 112306
Google Scholar
[6] Sang L X, Wang C, Zhao Y, Ren Z Y 2023 J. Phys. Chem. C 127 14666
Google Scholar
[7] Wu K P, Zhang L, Wang D B, Li F Z, Zhang P Z, Sang L W, Liao M Y, Tang K, Ye J D, Gu S L 2022 Sci. Rep. 12 19907
Google Scholar
[8] Swartz E T, Pohl R O 1989 Rev. Mod. Phys. 61 605
Google Scholar
[9] Sadasivam S, Waghmare U V, Fisher T S 2015 J. Appl. Phys. 117 134502
Google Scholar
[10] Wu B Y, Zhou M, Xu D J, Liu J J, Tang R J, Zhang P 2022 Surf. Interfaces 32 102119
Google Scholar
[11] Meng H, Maruyama S, Xiang R, Yang N 2021 Int. J. Heat Mass Transfer 180 121773
Google Scholar
[12] Qiu L, Zhu N, Feng Y H, Zhang X X, Wang X T 2020 Int. J. Heat Mass Transfer 152 119565
Google Scholar
[13] Wu J X, Wen H, Shi H Z, Chen C P, Huang B, Wei Y F, Li M 2019 Superlattices Microstruct. 130 258
Google Scholar
[14] Lu C C, Li Z H, Li S C, Li Z, Zhang Y Y, Zhao J H, Wei N 2023 Carbon 213 118250
Google Scholar
[15] Chen G F, Chen J, Wang Z L 2020 Int. J. Thermophys. 41 48
Google Scholar
[16] Wang B C, Shao W, Cao Q, Cui Z 2022 Int. J. Heat Mass Transfer 191 122850
Google Scholar
[17] Roodbari M, Abbasi M, Arabha S, Gharedaghi A, Rajabpour A 2022 J. Mol. Liq. 348 118053
Google Scholar
[18] Yang L, Wang C Z, Lin S W, Chen T H, Cao Y, Zhang P, Liu X H 2019 J. Phys. Condens. Matter 31 055302
Google Scholar
[19] 于泽沛, 冯妍卉, 冯黛丽, 张欣欣 2020 化工学报 71 1822
Google Scholar
Yu Z P, Feng Y H, Feng D L, Zhang X X 2020 CIESC J. 71 1822
Google Scholar
[20] Zhang Y J, Wang Z Y, Li N, Sun F Y, Hao J P, Wu H J, Zhang H L 2023 Appl. Surf. Sci. 638 158001
Google Scholar
[21] 宗志成, 潘东楷, 邓世琛, 万骁, 杨哩娜, 马登科, 杨诺 2023 物理学报 72 034401
Google Scholar
Zong Z C, Pan D K, Deng S C, Wang X, Yang L N, Ma D K, Yang N 2023 Acta Phys. Sin. 72 034401
Google Scholar
[22] 刘东静, 周福, 陈帅阳, 胡志亮 2023 物理学报 72 157901
Google Scholar
Liu D J, Zhou F, Chen S Y, Hu Z L 2023 Acta Phys. Sin. 72 157901
Google Scholar
[23] Aksoy M M, AlHosani M, Bayazitoglu Y 2021 Int. J. Thermophys. 42 87
Google Scholar
[24] Liu Y, Wu W H, Yang S X, Yang P 2022 Surf. Interfaces 28 101640
Google Scholar
[25] Hong Y, Zhang J C, Zeng X C 2016 Nanoscale 8 19211
Google Scholar
[26] Matsui M, Akaogi M 1991 Mol. Simul. 6 239
Google Scholar
[27] Heyhat M M, Abbasi M, Rajabpour A 2021 J. Mol. Liq. 333 115966
Google Scholar
[28] Ding Z W, Pei Q X, Jiang J W, Huang W X, Zhang Y W 2016 Carbon 96 888
Google Scholar
[29] Yang N, Luo T F, Esfarjani K, Henry A, Tian Z T, Shiomi J, Chalopin Y, Li B W, Chen G 2015 J. Comput. Theor. Nanosci. 12 168
Google Scholar
[30] Plimpton S 1995 J. Comput. Phys. 117 1
Google Scholar
[31] Zong Z C, Deng S C, Qin Y J, Wan X, Zhan J H, Ma D K, Yang N 2023 Nanoscale 15 16472
Google Scholar
[32] Huang H, Zhong Y H, Cai B, Wang J F, Liu Z X, Peng Q 2023 Surf. Interfaces 37 102736
Google Scholar
[33] Liang Z, Hu M 2018 J. Appl. Phys. 123 191101
Google Scholar
[34] Wu X, Han Q 2021 ACS Appl. Mater. Interfaces 13 32564
Google Scholar
[35] Mitra D, Howli P, Das B K, Das N S, Chattopadhyay P, Chattopadhyay K K 2020 J. Mol. Liq. 302 112499
Google Scholar
[36] Momenzadeh L, Moghtaderi B, Belova I V, Murch G E 2018 Comput. Condens. Matter 17 e00342
Google Scholar
[37] Chow P K, Cardona Quintero Y, O’Brien P, Hubert Mutin P, Lane M, Ramprasad R, Ramanath G 2013 Appl. Phys. Lett. 102 201605
Google Scholar
[38] Hatam-Lee S M, Jabbari F, Rajabpour A 2022 Nanoscale Microscale Thermophys. Eng. 26 40
Google Scholar
[39] Bao W L, Wang Z L, Tang D W 2022 Int. J. Heat Mass Transfer 183 122090
Google Scholar
[40] Zou H Y, Feng Y H, Qiu L, Zhang X X 2022 Int. J. Heat Mass Transfer 183 122216
Google Scholar
[41] Wilson B A, Nielsen S O, Randrianalisoa J H, Qin Z P 2022 J. Chem. Phys. 157 054703
Google Scholar
[42] Farahani H, Rajabpour A, Khanaki M, Reyhani A 2018 Comput. Mater. Sci. 142 1
Google Scholar
[43] 安盟, 孙旭辉, 陈东升, 杨诺 2022 物理学报 71 166501
Google Scholar
An M, Sun X H, Chen D S, Yang N 2022 Acta Phys. Sin. 71 166501
Google Scholar
[44] Hu M, Sergei S, Pawel K 2007 Appl. Phys. Lett. 91 241910
Google Scholar
[45] Kan Y J, Hong F, Wei Z Y, Bi K D 2020 Mater. Res. Express 7 095602
Google Scholar
[46] Wei Z Y, Ni Z H, Bi K D, Chen M H, Chen Y F 2011 Carbon 49 2653
Google Scholar
[47] Cao H Y, Guo Z X, Xiang H J, Gong X G 2012 Phys. Lett. A 376 525
Google Scholar
[48] Namsani S, Singh J K 2018 J. Phys. Chem. C 122 2113
Google Scholar
[49] Pei Q X, Guo J Y, Suwardi A, Zhang G 2023 J. Phys. Chem. C 127 19796
Google Scholar
[50] Wu X, Han Q 2022 Int. J. Heat Mass Transfer 191 122829
Google Scholar
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