Sustainable Energy & Fuels最新文献

{"title":"Improving the electrocatalytic activity of Pd nanoparticles through electronic coupling interaction with a Ni2P–MoS2 hybrid support for ethanol electro-oxidation in an alkaline medium†","authors":"Thabo Matthews, Makhaokane Paulina Chabalala, Siyabonga Patrick Mbokazi, Memory Zikhali, Tarekegn Heliso Dolla, Anatolijs Šarakovskis, Guntars Vaivars, Tunde Lewis Yusuf, Rhiyaad Mohamed and Nobanathi Wendy Maxakato","doi":"10.1039/D4SE01223B","DOIUrl":"https://doi.org/10.1039/D4SE01223B","url":null,"abstract":"<p >To improve the performance of direct ethanol fuel cells (DEFCs), which are hindered by traditional catalysts, having matters pertaining to stability, activity, and selectivity in reaction environments, various electrocatalysts such as Pd/Ni<small>₂</small>P, Pd/MoS<small>₂</small>, and Pd/Ni<small>₂</small>P–MoS<small>₂</small> were synthesized using the microwave-assisted NaBH<small>₄</small>–ethylene glycol reduction method. The research findings suggest that the Pd/Ni<small>₂</small>P–MoS<small>₂</small> catalyst we developed had the highest activity (1579 mA mg<small>_Pd</small><small>⁻¹</small>), approximately 21 times greater than that of commercial Pd/C. The stability of the electrocatalysts were examined using chronoamperometry (CA) and cyclic voltammetry (CV) measurements, which indicated that the Pd/Ni<small>₂</small>P–MoS<small>₂</small> electrocatalyst had good stability towards the ethanol oxidation reaction (EOR) in alkaline electrolyte. Electrochemical impedance spectroscopy (EIS) analysis showed that the Pd/Ni<small>₂</small>P–MoS<small>₂</small> electrocatalyst had lower charge transfer resistance, indicating better electrochemical kinetics. According to XRD, HR-TEM, XPS, and electrochemical analysis, the enhanced electrocatalytic activity, long-term stability of the Pd/Ni<small>₂</small>P–MoS<small>₂</small> electrocatalyst were attributable to the interface synergism as well as electronic and strain effects between the Pd, Ni<small>₂</small>P, and MoS<small>₂</small> interactions. This resulted in a downshift in the d-band center of the Pd/Ni<small>₂</small>P–MoS<small>₂</small> electrocatalyst, weakening intermediate adsorption and the adsorbate metal interaction.</p>","PeriodicalId":104,"journal":{"name":"Sustainable Energy & Fuels","volume":" 6","pages":" 1552-1564"},"PeriodicalIF":5.0,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/se/d4se01223b?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143594478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An unsymmetrical bifluorenylidene–fluorene based hole-transporting material for perovskite solar cells†","authors":"Vinay Kumar, Jianlin Chen, Praveen Kumar Singh, Bommaramoni Yadagiri, Deepak Kumar, Xuepeng Liu, Songyuan Dai and Surya Prakash Singh","doi":"10.1039/D5SE00078E","DOIUrl":"https://doi.org/10.1039/D5SE00078E","url":null,"abstract":"<p >Hole-transporting materials (HTMs) play a crucial role in perovskite solar cells (PSCs). Herein, we have designed and synthesized a new hole-transporting molecule, denoted as <strong>sp-35</strong>, from low-cost, commercially available reagents <em>via</em> a simple two-step synthesis route. The molecular architecture of <strong>sp-35</strong> consists of a bifluorenylidene core moiety covalently linked with phenylfluorenamine units at the end. The suitable energy levels, ideal surface morphologies, high hole mobility of 2.388 × 10<small>⁻³</small> cm<small>²</small> V<small>⁻¹</small> s<small>⁻¹</small>, and stable chemical structure of <strong>sp-35</strong> make it an effective HTM. As a result, PSCs constructed with <strong>sp-35</strong> exhibit a high power conversion efficiency (PCE) of 21.59%, while <strong>spiro-OMeTAD</strong> shows a PCE of 20.42%. Promisingly, the device with <strong>sp-35</strong> exhibits significantly better long-term and thermal stabilities than <strong>spiro-OMeTAD</strong>. This work presents a new molecular design and an in-depth understanding of the HTL strategy and its potential for the development of highly efficient cell performances.</p>","PeriodicalId":104,"journal":{"name":"Sustainable Energy & Fuels","volume":" 7","pages":" 1812-1821"},"PeriodicalIF":5.0,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143698371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cuprous thiocyanate as an inorganic hole transport material for carbon-based flexible perovskite solar cells†","authors":"Samyuktha Noola, Gyanendra Shankar, Francesca De Rossi, Emanuele Calabrò, Matteo Bonomo, Claudia Barolo and Francesca Brunetti","doi":"10.1039/D4SE01222D","DOIUrl":"https://doi.org/10.1039/D4SE01222D","url":null,"abstract":"<p >Flexible perovskite solar cells (F-PSCs) are highly promising for harvesting solar energy in various environments, both indoors and outdoors. Nonetheless, one of the main hurdles to the widespread commercial use of F-PSCs is the thermal evaporation of the metal top electrode, a time-consuming process that substantially increases the cost related to both raw materials and fabrication equipment. Consequently, developing effective alternatives is essential for harnessing the full potential of this technology. One promising approach is to replace the top metal electrode with carbon-based materials, which can effectively serve as both the hole transport layer (HTL) and back electrode. These materials are low cost and compatible with inexpensive, simple, and scalable deposition techniques, such as blade coating. However, HTL-free carbon-based PSCs (C-PSCs) currently suffer from power conversion efficiency (PCE) lower than their metal counterparts, due to inefficient charge transfer and collection, associated with an ineffective perovskite (PVK) and carbon electrode interface. By utilizing a suitable HTL between the PVK and the carbon electrode, the charge extraction can be effectively improved and the interfacial recombination reduced. Throughout this work, a screening of suitable hole transport materials (HTMs) was carried out to select the most promising candidate to improve the performance of C-PSCs on flexible substrates. Copper(<small>I</small>) thiocyanate (CuSCN) was employed as the HTL with a wide band gap (3.5–3.8 eV). At the optimized concentration of 10 mg ml<small>⁻¹</small>, a PCE of 9.4% was achieved on 1 cm<small>²</small> flexible devices. The results obtained were compared with the performance of F-PSCs with gold top electrodes using organic PTAA as the HTL as state-of-the-art reference. The optimization of the HTL allowed for the demonstration of a significant improvement in the performance of the device, which could pave the way for the large-scale commercialization of PSCs with low environmental impact and promising cost-effectiveness.</p>","PeriodicalId":104,"journal":{"name":"Sustainable Energy & Fuels","volume":" 7","pages":" 1786-1796"},"PeriodicalIF":5.0,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143698376","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"In situ-decorated heterocomposites derived from Zn(ii)-based coordination polymer for asymmetric supercapacitor applications†","authors":"Arif Ali, Khusboo Kumari, Anupama Joy, Fatma Parween, Mst Shubnur Sultana and Ganesh Chandra Nayak","doi":"10.1039/D4SE01517G","DOIUrl":"https://doi.org/10.1039/D4SE01517G","url":null,"abstract":"<p >Enhancing charge storage and balancing energy and power densities in a supercapacitor requires a hybrid approach. To this end, a material with high porosity, good crystalline stability, and an adjustable framework could be integrated with a 2D defect-containing material that has a large surface area. A hydrothermally synthesized Zn(<small>II</small>)-based coordination polymer, [Zn(IPA)<small>₂</small>(2-MI)<small>₂</small>]<small>_<em>n</em></small> (<strong>MZ</strong>) [IPA: isophthalic acid, 2MI: 2-methylimidazole], and <em>in situ</em> fabricated heterocomposites with <strong>MZ</strong> anchored on graphene oxide (GO) and reduced graphene oxide (RGO) interlayer sheets are presented here. <strong>MZ</strong> and its heterocomposites were characterized using spectroscopic (SC-XRD for <strong>MZ</strong>, UV-visible, FT-IR, PXRD with Rietveld refinement, and XPS) and nanoscopic (FE-SEM with EDX, and HR-TEM) techniques to confirm their structural compositions. The topological underlying net of <strong>MZ</strong> shows the uninodal <strong>2C1</strong> net topology. The synergistic effect between <strong>MZ</strong> and GO/RGO delivered good supercapacitance (SC) properties. Three electrode-based electrochemical analysis (1 M KCl, 1 M KOH, 1 M Na<small>₂</small>SO<small>₄</small>) revealed that <strong>GMZ23</strong> and <strong>RGMZ11</strong> exhibited better performance in 1 M KCl aqueous electrolyte than <strong>MZ</strong>. Furthermore, symmetric (SSC) and asymmetric supercapacitor (ASC) devices were designed and tested. The <strong>RGMZ11</strong> ASC device provided the specific capacitance (Sp. Cp.) of 154.53 F g<small>⁻¹</small> (specific capacity-247.48 C g<small>⁻¹</small>), the energy density (E. D.) of 54.99 W h kg<small>⁻¹</small>, and the power density (P. D.) of 160 W kg<small>⁻¹</small> at a 0.2 A g<small>⁻¹</small> current density in 1 M TEABF<small>₄</small> (DMSO) electrolyte. Up to 75% of the capacitance of <strong>RGMZ11</strong> was retained after 10 000 charge–discharge cycles at a current density of 5 A g<small>⁻¹</small>. Moreover, the capacitive and diffusion-controlled processes were examined using the Dunn method and it was found that the optimized device follows a diffusion-controlled process at lower scan rate. The optimized <strong>RGMZ11</strong> was successfully utilized to make a multi-color disco LED and a red LED glow. The above study suggests that the <strong>RGMZ11</strong> heterocomposite shows good performance for SC applications.</p>","PeriodicalId":104,"journal":{"name":"Sustainable Energy & Fuels","volume":" 6","pages":" 1505-1519"},"PeriodicalIF":5.0,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143594490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nitrogen-deficient porous g-C3N4 derived from an HMTA-regulated supramolecular precursor for enhanced photocatalytic H2 evolution†","authors":"Liuhao Mao, Kailin Chen, Yuzhou Jiang, Xing Kang, Yazhou Zhang, Cheng Cheng, Yu Chen and Jinwen Shi","doi":"10.1039/D4SE01835D","DOIUrl":"https://doi.org/10.1039/D4SE01835D","url":null,"abstract":"<p >Precursor structure engineering is a fundamental strategy for regulating the physicochemical properties of g-C<small>₃</small>N<small>₄</small>, which can promote the development of efficient photocatalysts. Herein, hexamethylenetetramine (HMTA) with a stable three-dimensional cage-like spatial configuration, was successfully incorporated into a melamine–cyanuric acid supramolecular complex <em>via</em> a hydrothermal method. Furthermore, a novel N-defect-rich porous g-C<small>₃</small>N<small>₄</small> was obtained through thermal pyrolysis of this HMTA-regulated supramolecular precursor. The presence of N defects and the resulting midgap states which were proved to be induced by HMTA-regulated precursor structure engineering could effectively enhance the light absorption and promote the separation of photogenerated carriers of g-C<small>₃</small>N<small>₄</small>. As a result, the HMTA-regulated g-C<small>₃</small>N<small>₄</small> exhibited an enhanced H<small>₂</small>-evolution activity of 2.77 mmol g<small>⁻¹</small> h<small>⁻¹</small>, which was 5.8 times that of pristine g-C<small>₃</small>N<small>₄</small>. This work proposes a molecular-level structure engineering strategy of g-C<small>₃</small>N<small>₄</small> by rationally incorporating functional molecules into the precursor, offering valuable insights for developing highly efficient photocatalysts.</p>","PeriodicalId":104,"journal":{"name":"Sustainable Energy & Fuels","volume":" 6","pages":" 1498-1504"},"PeriodicalIF":5.0,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143594489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Copper(i) bis(diimine) sensitized titania nanotube array photoelectrodes for photoelectrochemical water oxidation†","authors":"Joseph D. Chiong, Zujhar Singh, Joseph F. Ricardo-Noordberg, Nhat Truong Nguyen and Marek B. Majewski","doi":"10.1039/D4SE01768D","DOIUrl":"https://doi.org/10.1039/D4SE01768D","url":null,"abstract":"<p >Dye-sensitized photoelectrochemical cells (DS-PECs), devices inspired by photosynthesis, are being developed to advance the goal of using the sun as the sole source of energy for converting abundant resources to fuel and valuable chemicals. Herein, we report compact and vertically aligned titanium dioxide nanotubes grown through self-organized electrochemical anodization as semiconducting materials functionalized with a molecular copper(<small>I</small>) bis(diimine)-based acceptor–chromophore–donor to yield a photoanode capable of carrying out oxidative processes. The ability of these dye-sensitized photoanodes to drive oxidative processes is further confirmed photoelectrochemically through activation of a molecular iridium(<small>III</small>) water oxidation pre-catalyst where ultimately a Faradaic efficiency of 84% is found for O<small>₂</small> production.</p>","PeriodicalId":104,"journal":{"name":"Sustainable Energy & Fuels","volume":" 6","pages":" 1534-1544"},"PeriodicalIF":5.0,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/se/d4se01768d?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143594493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Charge transfer and reaction coordinate construction based theoretical investigation of the eNRR and HER on cuboidal silver phosphate: a tale of two competing mechanisms†","authors":"Prajna Parimita Mohanty, Tisita Das, Rajeev Ahuja and Sudip Chakraborty","doi":"10.1039/D4SE01614A","DOIUrl":"https://doi.org/10.1039/D4SE01614A","url":null,"abstract":"<p >We have performed systematic electronic structure calculations based on reaction coordinate construction and charge transfer analysis to explore the demarcation between two-competing mechanisms: the electrochemical nitrogen reduction reaction (eNRR) and hydrogen evolution reaction (HER). We have employed density functional theory based first-principles calculations to investigate the eNRR and HER on the cuboidal silver phosphate Ag<small>₃</small>PO<small>₄</small> surface in an acidic medium. For the eNRR, we have explored all three reaction mechanism pathways named distal, alternating and enzymatic, while the adsorption site selectivity has also been envisaged in this work. Among all the possible catalytic sites of Ag<small>₃</small>PO<small>₄</small>, the Ag site turned out to be the most energetically favourable for the eNRR that suppresses HER activity. The alternating pathway is confirmed to be the best catalytic pathway with a limiting potential of −0.60 V, as compared to −1.4 V and −2.9 V for distal and enzymatic pathways, respectively. The quantitative and qualitative analyses of the charge transfer process corresponding to the alternating pathway of the eNRR are also being explored from the perspective of Bader charge variation and charge density distribution.</p>","PeriodicalId":104,"journal":{"name":"Sustainable Energy & Fuels","volume":" 9","pages":" 2333-2339"},"PeriodicalIF":5.0,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143888451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Integrating surface coating and quasi-solid deep eutectic electrolytes for enhanced cycling of micro-Si anodes in Li-ion batteries†","authors":"Natthawut Suebsing, Pauline Jaumaux, Javad Safaei, Cherdsak Bootjomchai, Asif Mahmood, Udom Tipparach and Guoxiu Wang","doi":"10.1039/D4SE01640H","DOIUrl":"https://doi.org/10.1039/D4SE01640H","url":null,"abstract":"<p >Microsilicon (μ-Si) anodes exhibit promising capacity and energy density as lithium-ion battery (LIB) anodes. However, their application is affected by large volume changes, surface pulverization, poor interfacial contact, and limited cyclic stability. Here, we report an integrated methodology to protect μ-Si particles by coating the particle surface and integrating the coated Si particles with a quasi-solid-state (gel) electrolyte to achieve high performance and long-term stability. High-resolution transmission electron microscopy and X-ray photoelectron spectroscopy showed that the μ-Si particles were successfully coated with a polydopamine (PD) layer <em>via</em> a wet-chemical process to achieve PD@Si. Moreover, a quasi-solid-state electrolyte composed of LiTFSI/<em>N</em>-methylacetamide deep eutectic solvents and acrylate monomers was optimized to accommodate the volume change endured by μ-Si based anode during cycling. The as-prepared quasi-solid-state electrolyte exhibited a high ionic conductivity (1.63 × 10<small>⁻³</small> S cm<small>⁻¹</small>) at room temperature. Integrating PD@Si with the modified quasi-solid-state electrolyte delivered a superior stability upon cycling, maintaining a high specific capacity of 1000 mA h g<small>⁻¹</small> in the quasi-solid-state electrolyte at a current density of 1 A g<small>⁻¹</small> after 100 cycles in a half-cell battery. Furthermore, post-cycling analyses demonstrated that electrode cracking and delaminating were reduced with the co-utilization of coating and quasi-solid-state electrolyte. These results proved that μ-Si microparticle-based electrodes could be applied to high-energy quasi-solid-state batteries.</p>","PeriodicalId":104,"journal":{"name":"Sustainable Energy & Fuels","volume":" 6","pages":" 1480-1485"},"PeriodicalIF":5.0,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143594487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Triggering the phase transition of molybdenum di-selenide (MoSe2) 1T@2H by introducing copper (Cu+): experimental insights and DFT analysis for the hydrogen evolution reaction†","authors":"Gautham Kumar G, P. Balaji Bhargav, C. Balaji and Shobana Priyanka D","doi":"10.1039/D4SE01623H","DOIUrl":"https://doi.org/10.1039/D4SE01623H","url":null,"abstract":"<p >The quest to find an effective non-precious metal-based catalyst for the hydrogen evolution process has recently garnered widespread attention. Platinum (Pt) and other platinoids are the preferred catalyst for the hydrogen evolution reaction (HER). However, their widespread application is restricted by the scarcity of rare earth reserves and the consequent elevated costs. In this work, we synthesized a distinctive 1T/2H phase structure <em>via</em> a facile hydrothermal technique. Pristine MoSe<small>₂</small> and Cu–MoSe<small>₂</small> were deposited on a carbon cloth (CC) and were directly employed as electrodes in HERs, without the use of binders. The structures and basal planes of the as-prepared pristine MoSe<small>₂</small>@CC as well as 3% and 5%Cu–MoSe<small>₂</small>@CC samples were analysed <em>via</em> XRD, and their morphology was examined using field emission scanning electron microscopy (FESEM), revealing that each carbon fibre's surface was evenly covered with wrinkled nano petals in the shape of nanosheets. Elemental mapping using energy dispersive X-ray spectroscopy (EDX) revealed the coexistence of Cu, Mo, and Se, uniformly dispersed over the sample, and their corresponding energy states and binding energies were analysed using X-ray photoelectron spectroscopy (XPS). Findings indicated a substantial reduction in binding energy when copper was present on MoSe<small>₂</small>, which caused the metallic-semiconductor (1T/2H) phase to dominate. This meticulously developed architecture when coated on a carbon fibre substrate exhibited remarkable HER activity with a low onset potential of −113 mV <em>vs.</em> RHE (reversible hydrogen electrode), a Tafel slope of 87.2 mV per decade and excellent cycle stability of 80 h. In addition, density functional theory (DFT) studies conducted on the novel structure predicted that the introduction of Cu<small>⁺</small> ions into the MoSe<small>₂</small> monolayer can make interfacial semiconducting MoSe<small>₂</small> transform into metallic MoSe<small>₂</small>. This transformation is beneficial for speeding up charge transfer between the interfaces, promoting H atom adsorption and desorption kinetics and thus accelerating sluggish HER kinetics, thereby enhancing its catalytic performance. In brief, the present findings provide experimental and theoretical insights into developing advanced functional catalysts using phase engineering for energy-conversion applications.</p>","PeriodicalId":104,"journal":{"name":"Sustainable Energy & Fuels","volume":" 5","pages":" 1338-1352"},"PeriodicalIF":5.0,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143489340","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The value of enhanced geothermal systems for the energy transition in California","authors":"Mohammad J. Aljubran, Dimitri M. Saad, Mo Sodwatana, Adam R. Brandt and Roland N. Horne","doi":"10.1039/D4SE01520G","DOIUrl":"https://doi.org/10.1039/D4SE01520G","url":null,"abstract":"<p >Enhanced Geothermal Systems (EGS) offer a promising solution to decarbonizing electricity grids by providing clean firm power. We use the BRIDGES gas-electric capacity expansion model – a multi-sector energy model that optimizes energy system investment, retirements, and hourly dispatch over multiple time horizons – to explore the techno-economic impacts of integrating EGS into California's electricity and gas end-use sectors. This least-cost model co-optimizes for system expansion to meet electricity and heating demands, subject to gradually decreasing emission targets to reach a net-zero economy in 2045. We evaluated multiple EGS-focused scenarios by varying drilling depth, seismic exclusion zones, and dispatch flexibility. This allowed us to determine the influence of these factors on system capacity, costs, and emission reductions. Results showed that allowing drilling depths up to 7 km yielded up to 82 GW of EGS capacity by 2045, reducing the total system capacity requirement by 40% and system costs by 8.6% compared to cases without EGS. Flexible EGS dispatch further decreased system costs by 12.3%, although it accelerated reservoir depletion in the long term. EGS also reduced reliance on power-to-gas systems and supported electrification of heating, decreasing the total power-to-gas capacity by 50% compared to cases without EGS. This study demonstrated that EGS could be a critical component in achieving California's 2045 net-zero emissions target, offering significant cost reductions and enhanced system reliability across both the electricity and gas sectors.</p>","PeriodicalId":104,"journal":{"name":"Sustainable Energy & Fuels","volume":" 5","pages":" 1317-1337"},"PeriodicalIF":5.0,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143489338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}