Journal of Power Sources最新文献_第2页

Ion-exchange induced statically activated zinc-containing hydroxyapatite interface toward stable zinc metal anodes

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-04-18 DOI: 10.1016/j.jpowsour.2025.237049

Xiao Yang , Yixing Fang , Guodong Miao , Zhen Wang , Ping Li

{"title":"Ion-exchange induced statically activated zinc-containing hydroxyapatite interface toward stable zinc metal anodes","authors":"Xiao Yang , Yixing Fang , Guodong Miao , Zhen Wang , Ping Li","doi":"10.1016/j.jpowsour.2025.237049","DOIUrl":"10.1016/j.jpowsour.2025.237049","url":null,"abstract":"<div><div>Zinc (Zn) metal has garnered substantial interest as an anode material in aqueous zinc-ion batteries (AZIBs) due to its cost-effectiveness and high theoretical capacity. However, its commercial viability is impeded by critical issues such as dendritic growth and parasitic side reactions. This study presents the construction of the Zn-induce static activation for hydroxyapatite layer (Z-HAP) on the zinc anode, which exhibits enhanced interface stability. The Z-HAP layer, rich in zinc-affinitive sites, facilitates preferential adsorption and ion exchange with calcium, thereby enabling controlled and uniform zinc ion transport and directing zinc growth and deposition along the hydroxyapatite structure. As a result, the Z-HAP@Zn symmetric cell demonstrates over 1800 h at 1 mA cm<sup>−2</sup> with a cumulative capacity of 1 mAh cm<sup>−2</sup>, maintaining a low polarization voltage. Moreover, the Z-HAP@ZnǁMnO<sub>2</sub> battery achieves exceptional cycling stability, with a capacity of 157.5mAh g<sup>−1</sup> after 1000 cycles at 2 A g<sup>−1</sup>. This work reports on a statically activated hydroxyapatite layer that is effectively constructed on the zinc anode surface, providing valuable insights for the advancement of interface layer technologies in zinc anode applications.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"644 ","pages":"Article 237049"},"PeriodicalIF":8.1,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143842744","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Yolk-shell structured ultra-small Fe3C nanoparticles encapsulated in S, N-codoped porous carbon as effective catalysts for the oxygen reduction reaction in microbial fuel cells

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-04-18 DOI: 10.1016/j.jpowsour.2025.237058

Baitao Li, Xiqian Wang, Lingmin Wu

{"title":"Yolk-shell structured ultra-small Fe3C nanoparticles encapsulated in S, N-codoped porous carbon as effective catalysts for the oxygen reduction reaction in microbial fuel cells","authors":"Baitao Li, Xiqian Wang, Lingmin Wu","doi":"10.1016/j.jpowsour.2025.237058","DOIUrl":"10.1016/j.jpowsour.2025.237058","url":null,"abstract":"<div><div>Oxygen reduction reaction (ORR) at the cathode of Microbial Fuel Cells (MFCs) is the limiting step due to its slow kinetics, making the development of efficient, stable, and cost-effective catalysts essential. This study focuses on a yolk-shell structured ultra-small Fe<sub>3</sub>C nanoparticles encapsulated in a sulfur, nitrogen-codoped porous carbon matrix. The strong complexation of citric acid (CA) with iron ions results in a smaller particle size of Fe<sub>3</sub>C nanoparticles, and its pore forming ability favors the effective assemble of a unique hollow yolk-shell structure. Due to the highly dispersed and ultra-small (4.99 ± 0.23 nm) Fe<sub>3</sub>C nanoparticles and the presence of abundant Fe-N active sites, Fe-SNC-2CA demonstrates superior ORR activity compared to commercial Pt/C, with half-wave potentials of 0.88 V and 0.68 V in alkaline and neutral solutions, respectively. Its unique yolk-shell structure ensures excellent stability by preventing the aggregation and dissolution of internal Fe<sub>3</sub>C nanoparticles. The Fe-SNC-2CA equipped MFC achieves a power density of 1614 ± 60 mW m<sup>−2</sup>, maintaining output stability with a 5.3 % decay over 430 h, and finally contributes a 75.6 % chemical oxygen demand removal. This study highlights a straightforward yolk shell synthesis method and the beneficial role of ultra-small Fe<sub>3</sub>C in fuel cell application.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"644 ","pages":"Article 237058"},"PeriodicalIF":8.1,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143842741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Revealing the unexpected interfacial promotion effect of Cu3P on NiOx/black phosphorus for (photo-)electrocatalytic urea oxidation

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-04-18 DOI: 10.1016/j.jpowsour.2025.237078

Man Zhao , Zimei Fu , Wei Wen , Yuhong Chang , Wenxiang Wang , Meng Bai , Xiaoli Li , Li Zhang , Junming Zhang , He Xiao , Jianfeng Jia

{"title":"Revealing the unexpected interfacial promotion effect of Cu3P on NiOx/black phosphorus for (photo-)electrocatalytic urea oxidation","authors":"Man Zhao , Zimei Fu , Wei Wen , Yuhong Chang , Wenxiang Wang , Meng Bai , Xiaoli Li , Li Zhang , Junming Zhang , He Xiao , Jianfeng Jia","doi":"10.1016/j.jpowsour.2025.237078","DOIUrl":"10.1016/j.jpowsour.2025.237078","url":null,"abstract":"<div><div>Up to now, nickel-based materials have been considered as the most promising catalysts for urea oxidation reaction (UOR). However, the inevitable self-oxidation from Ni<sup>2+</sup> to Ni<sup>3+</sup> severely limited their activity during UOR. To trigger the UOR occurred before self-oxidation of Ni species by altering reaction pathways, here synergistic dual-site of Cu<sub>3</sub>P-NiO<sub>x</sub> on black phosphorus (BP) nanosheets is constructed by a facile self-designed electrosynthesis method, where exfoliation of bulky BP into nanosheets and formation of multivalent Ni or Cu precursor are both obtained during electrosynthesis process. The best Cu<sub>3</sub>P-NiO<sub>x</sub>/BP shows the potential of 1.378 V under light irradiation at 10 mA cm<sup>−2</sup> (without IR compensation), 187 mV lower than that in oxygen evolution reaction. This UOR activity of Cu<sub>3</sub>P-NiO<sub>x</sub>/BP is superior to Cu<sub>3</sub>P/BP or NiO<sub>x</sub>/BP, which is attributed to synergistic dual-site constructure of Cu<sub>3</sub>P-NiO<sub>x</sub>. In-situ and ex-situ characterizations suggest that in-situ generated Cu<sub>3</sub>P promotes adsorption and activation of urea molecules, and takes synergistic effect with NiO<sub>x</sub>, which makes urea oxidation undergoes a direct complete oxidation process. Moreover, with application of light illumination, excited photoelectrocatalytic effect by Cu<sub>3</sub>P further greatly enhances the activity for UOR. This study provides insights to the designing principles for optimizing reaction pathways toward small nucleophile molecule oxidation and effective strategies to develop efficient UOR photoelectrocatalysts.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"643 ","pages":""},"PeriodicalIF":8.1,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143842618","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Control of ion-transport channel structure of a metal-organic framework incorporated membrane for vanadium redox flow batteries

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-04-17 DOI: 10.1016/j.jpowsour.2025.237041

Jing Peng, Yuxin Long, Xicai Fan, Álvaro Pérez Ramos, Xin Zeng, Jiabo Luo

{"title":"Control of ion-transport channel structure of a metal-organic framework incorporated membrane for vanadium redox flow batteries","authors":"Jing Peng, Yuxin Long, Xicai Fan, Álvaro Pérez Ramos, Xin Zeng, Jiabo Luo","doi":"10.1016/j.jpowsour.2025.237041","DOIUrl":"10.1016/j.jpowsour.2025.237041","url":null,"abstract":"<div><div>Highly selective proton exchange membranes (PEMs) are essential for optimal performance in vanadium redox flow batteries (VRFBs). Achieving both high proton conductivity and low vanadium ion permeability simultaneously poses a significant challenge due to the intrinsic mechanism of ion transport within the membrane. In this study, a composite membrane series is developed by incorporating a Zr-based metal-organic framework (MOF) material, MIP-202, into sulfonated poly (ether-ether-ketone) (SPEEK) polymer. This integration restructures the ion-transport channels successfully, providing proton transfer paths but hindering vanadium crossover through size sieving effects. Additionally, it facilitates the formation of a hydrogen bonding network within hydrophilic domains and expands the ionic cluster sizes to enhance ion transfer. These combined effects significantly enhance membrane performance, resulting in a 76.5 % increase in ion selectivity. Detailed proton transfer processes within the polymer-MOF composite system are proposed based on experimental characterization and density functional theory (DFT) analysis to better understand the ion selectivity enhancement mechanism. The modification of the polymer membrane benefits the VRFB, demonstrating a Coulombic efficiency of 99.03 %, voltage efficiency of 81.99 %, and energy efficiency of 81.20 % at 120 mA cm<sup>−2</sup>, while retaining 92.20 % capacity after 200 cycles, surpassing the performance of pristine SPEEK, Nafion 117 and Nafion 212 membranes.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"643 ","pages":"Article 237041"},"PeriodicalIF":8.1,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143838411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigating wetting and formation behavior of consumer format pouch cells utilizing ultrasound

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-04-17 DOI: 10.1016/j.jpowsour.2025.236988

Simon Feiler , Jannis Johann , Lukas Gold , Andreas Gronbach , Guinevere A. Giffin

引用次数: 0

A photo-bio-hybrid catalyst with a triple synergistic enhancement effect to boost oxygen reduction for high-performance biofuel cells

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-04-17 DOI: 10.1016/j.jpowsour.2025.237050

Dandan Hu , Haoran Chen , Qiwen Su , Jian-Rong Zhang , Linlin Wang , Jun-Jie Zhu

{"title":"A photo-bio-hybrid catalyst with a triple synergistic enhancement effect to boost oxygen reduction for high-performance biofuel cells","authors":"Dandan Hu , Haoran Chen , Qiwen Su , Jian-Rong Zhang , Linlin Wang , Jun-Jie Zhu","doi":"10.1016/j.jpowsour.2025.237050","DOIUrl":"10.1016/j.jpowsour.2025.237050","url":null,"abstract":"<div><div>Bilirubin oxidase (BOD)-catalyzed oxygen reduction reaction (ORR) exhibits outstanding advantages compared to abiotic electro-catalysts in neutral environment, thus playing a crucial role in fuel cells. However, limited by the low solubility of oxygen and the impeded extracellular electron transfer, the activity of BOD is fast-approaching its upper threshold. Given this, we create a mutually enhanced bio-abiotic hybrid ORR photo-electro-catalyst by integrating BOD with pyrrole nitrogen-doped carbon nanodots (BOD/N<sub>pyo</sub>-CDs). In BOD/N<sub>pyo</sub>-CDs, N<sub>pyo</sub>-CDs generate photoelectrons and vacancies under illumination, and the vacancies and BOD simultaneously accept electrons from the anode. The photoelectrons can rapidly transfer to BOD's active center due to the high electron conductivity of N<sub>pyo</sub>-CDs and well-matched energy level, further boosting the ORR on BOD. This process promotes photoelectrons-vacancies separation of N<sub>pyo</sub>-CDs and reduces fluorescence energy dissipation, which in turn promotes the ORR by generating more photoelectrons. Thanks to the triple synergistic promotion effect, the current density of BOD/N<sub>pyo</sub>-CDs reaches 2.76 mA cm<sup>−2</sup>. Coupled with an Au nanozyme anode, we develop a glucose/oxygen fuel cell with remarkable power output (468 μW cm<sup>−2</sup>) and high stable open-circuit voltage (0.78 V, 70 h). This study shed light on breaking the limitation in energy conversion efficiency by creating a mutually promoted bio-abiotic catalyst.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"643 ","pages":"Article 237050"},"PeriodicalIF":8.1,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143844214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Water distribution and transmission within perforated gas diffusion layer and layered gas diffusion layer of a proton exchange membrane fuel cell

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-04-17 DOI: 10.1016/j.jpowsour.2025.237024

Shu-Fen Sun , Z.Y. Sun

{"title":"Water distribution and transmission within perforated gas diffusion layer and layered gas diffusion layer of a proton exchange membrane fuel cell","authors":"Shu-Fen Sun , Z.Y. Sun","doi":"10.1016/j.jpowsour.2025.237024","DOIUrl":"10.1016/j.jpowsour.2025.237024","url":null,"abstract":"<div><div>Effective water management within the gas diffusion layer (GDL) is especially critical to the performance of the proton exchange membrane fuel cell (PEMFC). Various parameters, including operation time, driving voltage, porosity, and structure features, collectively govern water saturation distribution within the PEMFC. Through experimentally validated numerical simulations (with a maximum error of 4.7 % against experimental data), this study examines the effects of different porosity and contact angle distributions of GDL, as well as the addition of a microporous layer (MPL) and perforation, on the water drainage efficiency of a fuel cell under various operating conditions. The findings indicated that GDL's water removal capacity improved as the contact angle and porosity increased. Arranging the porosity in a positive manner or the contact angle in a negative manner effectively enhanced the GDL's water removal capability. A higher difference in porosity between MPL and GDL, with MPL having a lower porosity and a lower thickness ratio, resulted in better water transport performance for the GDL. The GDL utilizes a through-hole structure as a drainage channel for efficient water transport, and a smaller through-hole diameter leads to improved drainage effectiveness.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"643 ","pages":"Article 237024"},"PeriodicalIF":8.1,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143844219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characterization and testing of strontium titanium ferrite-based solid oxide cells for reversible and co-electrolysis operation

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-04-17 DOI: 10.1016/j.jpowsour.2025.237029

Maria Carmenza Diaz Lacharme, Alessandro Donazzi

{"title":"Characterization and testing of strontium titanium ferrite-based solid oxide cells for reversible and co-electrolysis operation","authors":"Maria Carmenza Diaz Lacharme, Alessandro Donazzi","doi":"10.1016/j.jpowsour.2025.237029","DOIUrl":"10.1016/j.jpowsour.2025.237029","url":null,"abstract":"<div><div>This study investigates the electrocatalytic performance and the preliminary durability of SrTi<sub>0.3</sub>Fe<sub>0.7</sub>O<sub>3-δ</sub> (STF) and Sr<sub>0.95</sub>(Ti<sub>0.3</sub>Fe<sub>0.63</sub>Ni<sub>0.07</sub>)O<sub>3-δ</sub> (STF-Ni) as fuel electrodes for solid oxide cells operated at 750 °C in reversible mode with H<sub>2</sub>/H<sub>2</sub>O and CO/CO<sub>2</sub> mixtures, and in H<sub>2</sub>O/CO<sub>2</sub> co-electrolysis mode. STF-Ni achieved a peak power density of 415 mW/cm<sup>2</sup> under 3 % humidified H<sub>2</sub>, and maintained 96 % of its performance over 96 h of H<sub>2</sub>/H<sub>2</sub>O reversible operation. In co-electrolysis, STF-Ni delivered a maximum current density of 540 mA/cm<sup>2</sup> at 1.4 V, with 15 % performance drop at 1.2 V after 162 h. Reversible operation with CO/CO<sub>2</sub> mixtures proved most challenging, as surface SrCO<sub>3</sub> formation caused significant degradation, and stable performance was reached only on STF-Ni. STF-Ni consistently demonstrated superior stability compared to STF across all the operative modes. A 0D model was utilized to analyze the I/V curves of STF-Ni: a power-law rate for the fuel electrode's kinetics with H<sub>2</sub> and H<sub>2</sub>O mixtures was extracted, and the kinetic insensitivity to the CO<sub>2</sub> amount in co-electrolysis was proved. Complementary characterization using XRD, TPR, SEM, and TEM techniques highlighted the role of exsolution. After exposure to CO<sub>2</sub>, compositional changes in exsolved Ni-Fe nanoparticles were observed, with selective reincorporation of Fe into the perovskite structure.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"643 ","pages":"Article 237029"},"PeriodicalIF":8.1,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143838422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Anode-supported fuel cell with promising Co-free (La,Pr)2(Ni,Cu)O4-based cathode

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-04-17 DOI: 10.1016/j.jpowsour.2025.237022

A.R. Gilev, K.S. Sukhanov, E.A. Kiselev, M.E. Sobol, V.A. Cherepanov

{"title":"Anode-supported fuel cell with promising Co-free (La,Pr)2(Ni,Cu)O4-based cathode","authors":"A.R. Gilev, K.S. Sukhanov, E.A. Kiselev, M.E. Sobol, V.A. Cherepanov","doi":"10.1016/j.jpowsour.2025.237022","DOIUrl":"10.1016/j.jpowsour.2025.237022","url":null,"abstract":"<div><div>La<sub>1.5</sub>Pr<sub>0.5</sub>Ni<sub>0.4</sub>Cu<sub>0.6</sub>O<sub>4+δ</sub> (LPNC) and La<sub>2</sub>NiO<sub>4+δ</sub> (LN) oxides are applied and compared as cathodes in the anode-supported fuel cells with the Ce<sub>0.8</sub>Sm<sub>0.2</sub>O<sub>2-δ</sub> (SDC) thin electrolyte. LPNC and LN samples are synthesized by citrate-nitrate method. Doping of LN with Pr and Cu leads to a reduction of the final annealing temperature down to 750 °C. The optimal sintering temperature for electrode fabrication is also reduced to 950 °C, compared to 1000 °C for undoped LN. Differential analysis of <em>i-V</em> characteristics (DiVA) for the studied LPNC/SDC/Ni-SDC fuel cells shows that potential drop with increasing current is mainly associated with ohmic losses and gas diffusion limitations at higher current densities. The contribution of the activation polarization increases when LPNC is replaced by LN indicating slower electrode reaction in the latter. Electrochemical Impedance Spectroscopy (EIS) studies show that the polarization resistance of the studied fuel cells is mainly determined by the cathode in the temperature range of 600–750 °C. Fuel cell tests reveal that LPNC has significantly higher ORR activity than undoped LN. The maximal power densities for the LPNC/SDC(28 μm)/Ni-SDC fuel cell are 1.46, 1.25, 0.94 and 0.62 W cm<sup>−2</sup> at 750, 700, 650 and 600 °C, respectively.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"643 ","pages":"Article 237022"},"PeriodicalIF":8.1,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143844211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

TiO2/BiVO4 dual photoanodes: Extending light harvesting and addressing band edge misalignment for photoelectrochemical water splitting

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-04-17 DOI: 10.1016/j.jpowsour.2025.237070

Ahmed El Hattab , Amir Mirzaei , Amr A. Nada , Zahra Shayegan , Stéphanie Roualdes , Mohamed Chaker

{"title":"TiO2/BiVO4 dual photoanodes: Extending light harvesting and addressing band edge misalignment for photoelectrochemical water splitting","authors":"Ahmed El Hattab , Amir Mirzaei , Amr A. Nada , Zahra Shayegan , Stéphanie Roualdes , Mohamed Chaker","doi":"10.1016/j.jpowsour.2025.237070","DOIUrl":"10.1016/j.jpowsour.2025.237070","url":null,"abstract":"<div><div>Combining two photocatalysts to form heterojunctions is a common strategy to enhance the photoelectrochemical (PEC) performance in water splitting. However, this approach requires suitable band alignment between the two photocatalysts, which limits its effectiveness or even deteriorate the performance, as seen with mismatched type I heterojunctions. In this work, we design a dual photoanode configuration overcoming the unfavorable type I band alignment commonly formed in TiO<sub>2</sub>/BiVO<sub>4</sub> heterojunctions. Using pulsed laser deposition (PLD), we optimized the deposition parameters to independently maximize photocurrent generation in transparent TiO<sub>2</sub> and BiVO<sub>4</sub> films, deposited separately on FTO substrates. The two photoanodes were then connected and positioned back-to-back, with the TiO<sub>2</sub> photoanode facing the light source and the BiVO<sub>4</sub> photoanode illuminated by light passing through the TiO<sub>2</sub> layer. The TiO<sub>2</sub>/BiVO<sub>4</sub> dual photoanode generates a photocurrent of 1.72 mA/cm<sup>2</sup> at 1.3 V vs. RHE, 2.3 times higher than that of TiO<sub>2</sub>/BiVO<sub>4</sub> heterojunction. Similarly, PEC hydrogen production increased to 14.2 μmol cm<sup>−2</sup> h<sup>−1</sup>, which is 2.25 times higher than BiVO<sub>4</sub> alone and 2.9 times greater than TiO<sub>2</sub>/BiVO<sub>4</sub> heterojunction. This improvement is attributed to the extended light absorption and larger active surface area provided by the dual photoanode, while avoiding the charge carrier recombination typically associated with type I heterojunction interfaces.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"643 ","pages":"Article 237070"},"PeriodicalIF":8.1,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143844212","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0