Yichen Ke, Zhuoying Cheng, Dianxue Cao, Jin Yi, Shengnan Zhang, Fanghua Ning, Kai Zhu
{"title":"Charge Storage Mechanisms and Material Design of Ammonium Ion Batteries","authors":"Yichen Ke, Zhuoying Cheng, Dianxue Cao, Jin Yi, Shengnan Zhang, Fanghua Ning, Kai Zhu","doi":"10.1002/cnl2.70182","DOIUrl":"https://doi.org/10.1002/cnl2.70182","url":null,"abstract":"<p>Aqueous ammonium-ion batteries (AAIBs) have emerged as a compelling alternative for large-scale energy storage due to the abundance, safety, and unique chemistry of NH<sub>4</sub><sup>+</sup> charge carriers. However, the commercialization of AAIBs is hindered by significant challenges, including the severe structural strain induced by the bulky NH<sub>4</sub><sup>+</sup> ion and the restricted electrochemical stability window of aqueous electrolytes that leads to undesired side reactions. This review provides a systematic overview of the recent progress in AAIBs, focusing on the fundamental charge storage mechanisms and advanced material design strategies. This review categorize and evaluate key electrode materials, including Prussian blue analogs, transition metal oxides, and organic compounds, emphasizing how modification strategy can accommodate the large NH<sub>4</sub><sup>+</sup> ions to enhance cycling stability. Furthermore, we discuss the evolution of electrolyte systems from dilute solutions to highly concentrated “Water-in-Salt” electrolytes as a means to suppress water splitting and expand operating voltages. This review concludes that the unique tetrahedral geometry and hydrogen-bonding of NH<sub>4</sub><sup>+</sup> are central to designing high-performance electrodes and electrolytes. These insights provide a clear roadmap for transitioning AAIBs from fundamental research to practical, large-scale energy storage applications.</p>","PeriodicalId":100214,"journal":{"name":"Carbon Neutralization","volume":"5 5","pages":""},"PeriodicalIF":12.0,"publicationDate":"2026-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cnl2.70182","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148848711","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hengchi Liu, Liu Huang, Ziyan Fu, Xinya Wang, Yue Liu, Shuang Cao, Zhongbiao Wu, Le Shi
{"title":"Methane Valorization Toward Carbon Neutralization: Catalytic Materials, Multiphase Interfaces, and Reactor Engineering Under Mild Conditions","authors":"Hengchi Liu, Liu Huang, Ziyan Fu, Xinya Wang, Yue Liu, Shuang Cao, Zhongbiao Wu, Le Shi","doi":"10.1002/cnl2.70195","DOIUrl":"https://doi.org/10.1002/cnl2.70195","url":null,"abstract":"<p>The direct conversion of methane into value-added chemicals under mild conditions offers a sustainable pathway to utilize this abundant hydrocarbon feedstock and mitigate greenhouse gas emissions. However, the thermodynamic stability of the C─H bond and the propensity for product overoxidation pose formidable scientific challenges. This review systematically summarizes recent breakthroughs in electrocatalytic, photocatalytic, and photoelectrocatalytic strategies for methane valorization. We critically examine fundamental activation mechanisms, structure-property relationships in catalyst design, and strategies to tune product selectivity toward liquid oxygenates and coupled hydrocarbons. Beyond material innovation, this review places particular emphasis on reactor engineering, elaborating on the evolution from conventional batch systems to advanced continuous flow architectures, such as gas convection electrodes and hierarchical triphase diffusion architectures, to overcome mass transfer limitations. Finally, we provide forward looking perspectives on emerging frontiers, including data-driven catalyst discovery and integrated system design, to guide the transition from laboratory research to industrial implementation.</p>","PeriodicalId":100214,"journal":{"name":"Carbon Neutralization","volume":"5 5","pages":""},"PeriodicalIF":12.0,"publicationDate":"2026-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cnl2.70195","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148784689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Synergistic Fe/Cr Co-Doping and Graphene Compositing Boost Ni4OHF7-Based Supercapacitor Electrodes","authors":"Zeyu Hao, Huanlu Tu, Ziyu Wang, Ziyang Yu, Zhiyi Chen, Shansheng Yu, Xiaoying Hu, Chengyin Wang, Wei Kong Pang, Baohua Jia, Tianyi Ma, Hongwei Tian, Dawei Su","doi":"10.1002/cnl2.70200","DOIUrl":"https://doi.org/10.1002/cnl2.70200","url":null,"abstract":"<p>Nickel hydroxyfluoride (Ni<sub>4</sub>OHF<sub>7</sub>) has attracted increasing attention due to its high theoretical capacitance, yet its rate capability and cycling stability remain to be substantially improved. Here, we achieve dual optimization through elemental doping and support interaction, doping with Fe and Cr to enhance the rate capability, and compositing with reduced graphene oxide (rGO) to improve cycling stability. Experimental results show that the introduction of Cr, with lower electronegativity, further elevates the electronic state of the host element, while rGO facilitates the uniform distribution of active materials. The comprehensively optimized electrode material, denoted NFCHF/G, delivers a specific capacitance of 2852 F g<sup>−1</sup> at a current density of 1 A g<sup>−1</sup>, and retains 80% of its initial specific capacitance after 10,000 cycles. An asymmetric supercapacitor (ASC) based on NFCHF/G//AC achieves a maximum energy density of 71.9 Wh kg<sup>−1</sup> at a power density of 750 W kg<sup>−1</sup>, demonstrating promising application prospects. This work provides a reliable strategy for the development of hydroxyfluoride-based electrode materials and is expected to better meet future energy demands.</p>","PeriodicalId":100214,"journal":{"name":"Carbon Neutralization","volume":"5 5","pages":""},"PeriodicalIF":12.0,"publicationDate":"2026-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cnl2.70200","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148783989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Recent Advances in Metal-Organic Framework Photo-Electrocatalysts for the Synthesis of Ammonia","authors":"Jingjing Wang, Kaiyan Shi, Zhenlin Zhao, Yafu Wang, Ke Yang, Rui Ren, Jianqi Lu, Zhencheng Feng, Xiaojun Gu, Jiangwei Zhang","doi":"10.1002/cnl2.70185","DOIUrl":"https://doi.org/10.1002/cnl2.70185","url":null,"abstract":"<p>Ammonia (NH<sub>3</sub>) is a key precursor for fertilizers and bulk chemicals, with global production reaching approximately 200 million tons in 2018. It is also regarded as a highly promising hydrogen carrier thanks to its high hydrogen content and the ease with which it can be stored and transported. However, the traditional Haber process for synthesizing ammonia is energy-intensive and produces significant carbon emissions, making the development of sustainable new synthesis routes imperative. In recent years, nitrogen reduction reactions (NRR/NO<sub>x</sub>RR) involving photocatalysis, electrocatalysis, or both (photo-electrocatalysis) have received significant attention for their potential to drive ammonia synthesis under mild conditions using renewable electrical or solar energy. The key advancement in this field is designing high-performance catalysts. Metal-organic frameworks (MOFs), in particular, have emerged as an ideal platform for elucidating reaction mechanisms and enhancing catalytic performance, thanks to their precisely tunable structures, adjustable porosity, well-defined active sites, and ease of modification. This review outlines the application and research advances of MOF-based materials in photocatalytic, electrocatalytic, and photo-electrocatalytic nitrogen and NO<sub>3</sub><sup>-</sup> reduction for ammonia synthesis in a systematic way. The focus is on how the rational design of MOF metal nodes, organic ligands, and pore environments can regulate key steps, including light absorption, charge separation/transport, nitrogen adsorption activation, and proton transfer, to optimize catalytic performance. The paper thoroughly analyses effective strategies, including defect engineering, structural regulation, and morphology design, to overcome current challenges associated with catalysts, such as low selectivity, insufficient activity, and poor stability. Leveraging the programmable nature of MOF materials, the paper envisages their future role as models for studying mechanisms and as high-performance catalysts in advancing green ammonia synthesis technology toward practical application.</p>","PeriodicalId":100214,"journal":{"name":"Carbon Neutralization","volume":"5 5","pages":""},"PeriodicalIF":12.0,"publicationDate":"2026-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cnl2.70185","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148754166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Front Cover: Carbon Neutralization, Volume 5, Issue 5, September 2026","authors":"Jiaxin Wu, Xianjun Cao, Fengying Pan, Jinhu Wu, Fan Zhang, Yihao Shan, Pengpeng Zhang, Hong Gao, Ling Zhang, Jinqiang Zhang, Hao Liu, Yufei Zhao","doi":"10.1002/cnl2.70201","DOIUrl":"https://doi.org/10.1002/cnl2.70201","url":null,"abstract":"<p><b>Front cover image</b>: Developing highly efficient and durable electrocatalysts for the acidic hydrogen evolution reaction (HER) is vital for green hydrogen production via proton exchange membrane (PEM) water electrolysis, aligning with intermittent renewable energy sources and zero-carbon emission transportation. However, sluggish reaction kinetics and low precious metal utilization of conventional cathode materials pose significant challenges. Accurate regulation of both electronic structure and interfacial reaction kinetics could resolve these issues. In article number e70183, the cover image showcases a highly efficient PtRu alloy cluster electrocatalyst (Pt<sub>1</sub>Ru<sub>1</sub>/HMCS) anchored on hollow mesoporous carbon spheres. The strong electronic coupling between Pt and Ru atoms synergistically optimizes hydrogen adsorption/desorption behavior. The Ru sites, acting as the primary active centers, enrich and order the proton transport network at the interface, enabling rapid and directional proton migration, thus enhancing the HER performance.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":100214,"journal":{"name":"Carbon Neutralization","volume":"5 5","pages":""},"PeriodicalIF":12.0,"publicationDate":"2026-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cnl2.70201","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148753881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Zhijiang Su, Chunwei Dong, Zhihua Han, Tong Yang, Nannan Zhang, Guanghong Pan, Yang Dong, Xiaojie Sun, Xiangfei Meng, Xiaodong Jian, Dongjie Shi, Jiaye Ye, Qing Jiang
{"title":"2H-Phase Molybdenum Diselenide/Hollow Carbon Sphere-Based Separator With “One-Stone-Two-Birds” Effect Boosting High-Performance Lithium-Sulfur Batteries","authors":"Zhijiang Su, Chunwei Dong, Zhihua Han, Tong Yang, Nannan Zhang, Guanghong Pan, Yang Dong, Xiaojie Sun, Xiangfei Meng, Xiaodong Jian, Dongjie Shi, Jiaye Ye, Qing Jiang","doi":"10.1002/cnl2.70198","DOIUrl":"https://doi.org/10.1002/cnl2.70198","url":null,"abstract":"<p>Lithium-sulfur batteries (LSBs) offer advantages such as high energy density, cost-effectiveness, and abundant sulfur resources and therefore are regarded as ideal large-scale energy storage systems. However, due to the shuttle effect caused by the dissolution of soluble lithium polysulfides (LiPSs) into the electrolyte, LSBs face issues of low reversible capacity and rapid capacity decay. To overcome this limitation, a multifunctional polypropylene separator is developed by 2hexagonal-phase molybdenum diselenide (2H-MoSe<sub>2</sub>) functionalized hollow carbon spheres through a coating method. 2H-MoSe<sub>2</sub> strongly interacts with soluble LiPSs, enhancing their redox dynamics and improving sulfur utilization. Additionally, density functional theory (DFT) calculations reveal that the diffusion barrier for Li ions on the 2H-MoSe<sub>2</sub> surface is minimal, facilitating efficient lithium-ion transport. Furthermore, hollow carbon spheres physically restrict the dissolution of soluble LiPSs. This multifunctional separator exhibits excellent electrochemical performance in LSBs, achieving a high reversibility of 800 mAh g<sup>−1</sup> at 1.0 C after 1500 cycles. This investigation presents an efficacious approach to the development of a functional separator with shuttle suppression capabilities.</p>","PeriodicalId":100214,"journal":{"name":"Carbon Neutralization","volume":"5 5","pages":""},"PeriodicalIF":12.0,"publicationDate":"2026-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cnl2.70198","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148753206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yanran Wang, Zhijia Huang, Baoyin Yuan, Xuan Li, Fangyuan Zheng, Chunmei Tang, Ling Meng, Qingwen Su, Jingwei Qiu, Xin Li, Chen Song, Ning Wang, Siyu Ye
{"title":"Rational Design of La0.6Sr0.4CoO3−δ-Based Oxygen Electrodes for Solid Oxide Cells: Integrating Machine-Learning Prediction With Experimental Characterization","authors":"Yanran Wang, Zhijia Huang, Baoyin Yuan, Xuan Li, Fangyuan Zheng, Chunmei Tang, Ling Meng, Qingwen Su, Jingwei Qiu, Xin Li, Chen Song, Ning Wang, Siyu Ye","doi":"10.1002/cnl2.70196","DOIUrl":"https://doi.org/10.1002/cnl2.70196","url":null,"abstract":"<p>Solid oxide cells (SOCs) are promising for efficient energy conversion, but their electrochemical performances are largely limited by the conductivity, catalytic activity, and durability of oxygen electrode materials. La<sub>0.6</sub>Sr<sub>0.4</sub>CoO<sub>3−<i>δ</i></sub> (LSC)-based oxides as promising oxygen electrodes of SOCs, are widely studied. Here, we systematically studied Fe/Ni/Mn doped LSC-based oxides by combining machine learning (ML) prediction with experimental characterizations. Among them, La<sub>0.6</sub>Sr<sub>0.4</sub>Co<sub>0.8</sub>Mn<sub>0.2</sub>O<sub>3−<i>δ</i></sub> shows the outstanding performance. Mn dopant not only suppresses the grain growth but also induces the highest concentration of oxygen vacancies than others, enabling the high proton uptake ability (0.05 mol unit<sup>−1</sup> at 650°C) and catalytic activity. Moreover, the LSCM shows low thermal expansion coefficient of 17.5 × 10<sup>−6 </sup>K<sup>−1</sup>, lower than most of Co-based oxides. The SOC with LSCM oxygen electrode achieves a high electrolysis current density of 1.45 A cm<sup>−2</sup> at 1.3 V and 600°C. This work demonstrates the great potential of using the ML model prediction and experimental characterizations to optimize the electrode materials.</p>","PeriodicalId":100214,"journal":{"name":"Carbon Neutralization","volume":"5 5","pages":""},"PeriodicalIF":12.0,"publicationDate":"2026-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cnl2.70196","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148617018","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Hydroelectric-Coupled Supercapacitor System for Simultaneous Energy Conversion and Storage With Binder-Free WS2 Nanostructures","authors":"Rajavarman Swaminathan, Sang-Jae Kim","doi":"10.1002/cnl2.70194","DOIUrl":"https://doi.org/10.1002/cnl2.70194","url":null,"abstract":"<p>The growing adoption of flexible electronics, electric mobility, and decentralized energy systems has intensified the demand for scalable electrochemical energy-storage technologies capable of delivering high power under dynamic and mechanically flexible conditions, which are essential for self-sustaining energy ecosystems. In this work, binder-free tungsten disulfide (BF-WS<sub>2</sub>) nanoarchitectured electrodes were directly grown on carbon cloth via a one-step hydrothermal process and investigated for scalable supercapacitor applications. Structural and chemical analyses confirm the formation of a hexagonal WS<sub>2</sub> nanostructure grown on the carbon cloth substrate. The BF-WS<sub>2</sub> electrode exhibits a specific capacitance of 1261 F g<sup>−1</sup> at 5 mV s<sup>−1</sup>, demonstrating excellent electrochemical energy storage capability. A flexible BF-WS<sub>2</sub> symmetric solid-state supercapacitor (BF-WS<sub>2</sub> SSC) fabricated using a PVA/H<sub>2</sub>SO<sub>4</sub> gel electrolyte delivers a device capacitance of 363.5 F g<sup>−1</sup> at 7.5 mA, achieving an energy density of 50 Wh kg<sup>−1</sup> and a power density of 9090.9 W kg<sup>−1</sup>. Moreover, modular series-parallel integration enables tunable voltage/current output, and direct coupling with a water-flow-driven hydroelectric generator demonstrates renewable-energy-driven charging of the stacked BF-WS<sub>2</sub> SSC device to 5 V. This work highlights binder-free WS<sub>2</sub> nanostructure as a scalable electrode platform for modular, flexible, and hydroelectric-assisted self-powered supercapacitor systems.</p>","PeriodicalId":100214,"journal":{"name":"Carbon Neutralization","volume":"5 4","pages":""},"PeriodicalIF":12.0,"publicationDate":"2026-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cnl2.70194","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148615640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Correction to “Deciphering Catalytic Reaction Mechanisms for Low-Temperature Ammonia Synthesis: Mechanism-Guided Rational Design of Active Sites”","authors":"","doi":"10.1002/cnl2.70197","DOIUrl":"https://doi.org/10.1002/cnl2.70197","url":null,"abstract":"<p>Jinshu Tian, Yukun Bai, Chi Wang, Tao Jin, Bing Lu, Yongpeng Ren, Yaru Li, Haoran Shi, Yihan Zhu, Xiaonian Li, Deciphering Catalytic Reaction Mechanisms for Low-Temperature Ammonia Synthesis: Mechanism-Guided Rational Design of Active Sites, Carbon Neutralization, 2026; 5: e70181, DOI:10.1002/cnl2.70181</p><p>An inaccuracy was identified in the author affiliation section of the article. The university name was presented incompletely where the institutional identifier “Zhejiang” was inadvertently omitted before “University of Technology”, resulting in an incorrect full name of the affiliated institution. The official and correct name of the university is Zhejiang University of Technology. The full corrected affiliation is as follows: “State Key Laboratory of Green Chemical Synthesis and Conversion and College of Chemical Engineering, Zhejiang Key Laboratory of Surface and Interface Science and Engineering for Catalysts, Zhejiang University of Technology, Hangzhou, Zhejiang, China”</p><p>We apologize for this error.</p>","PeriodicalId":100214,"journal":{"name":"Carbon Neutralization","volume":"5 4","pages":""},"PeriodicalIF":12.0,"publicationDate":"2026-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cnl2.70197","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148615639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Linpeng Du, Zikuo Wang, Jie Tian, Detlef W. Bahnemann, Jia Hong Pan
{"title":"Photodeposited Silver-Driven Phase Engineering of Bismuth-Based Halide Perovskite Enabling Tunable Heterojunctions for Efficient CO2 Photoreduction","authors":"Linpeng Du, Zikuo Wang, Jie Tian, Detlef W. Bahnemann, Jia Hong Pan","doi":"10.1002/cnl2.70188","DOIUrl":"https://doi.org/10.1002/cnl2.70188","url":null,"abstract":"<p>Cs<sub>3</sub>Bi<sub>2</sub>Br<sub>9</sub> has emerged as a competitive lead-free photocatalyst owing to its low toxicity and favorable stability. However, its practical application is still limited by the rapid recombination of photogenerated carriers and a narrow photoresponse range. Herein, we report a facile in situ photodeposition strategy to engineer Cs<sub>3</sub>Bi<sub>2</sub>Br<sub>9</sub> with controlled silver loadings, enabling the selective construction of S-scheme Cs<sub>3</sub>Bi<sub>2</sub>Br<sub>9</sub>@AgBr and Type I Cs<sub>3</sub>Bi<sub>2</sub>Br<sub>9</sub>@Cs<sub>2</sub>AgBiBr<sub>6</sub> heterojunctions. Among these, the optimized S-scheme heterojunction (CBB-Ag<sub>2</sub>) delivers a CO yield 4.7 times higher than that of pristine Cs<sub>3</sub>Bi<sub>2</sub>Br<sub>9</sub>, achieving superior CO<sub>2</sub> photoreduction performance. Mechanistic investigations reveal that the built-in electric field within the S-scheme heterojunction establishes efficient interfacial charge transfer channels, effectively suppressing carrier recombination and promoting <sup>•</sup>OH generation, which collectively lower the energy barrier for *COOH formation—the rate-determining step in CO<sub>2</sub>-to-CO conversion. This work presents a scalable and phase-controllable strategy for constructing high-performance, lead-free perovskite photocatalysts, offering valuable insights into rational heterojunction design for efficient CO<sub>2</sub> valorization toward carbon neutrality.</p>","PeriodicalId":100214,"journal":{"name":"Carbon Neutralization","volume":"5 4","pages":""},"PeriodicalIF":12.0,"publicationDate":"2026-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cnl2.70188","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148466963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}